Meet the tepeo ZEB heat battery boiler – low-carbon heating with no outdoor unit, minimal changes to your home, and the familiar central heating you’re used to.
If a heat pump isn’t right for your property, the ZEB offers another way to move away from gas, oil or LPG while continuing to use your existing radiators or underfloor heating where suitable.
With winter approaching, now is a good time to find out whether a ZEB could work for your home.
Please choose your property type, floor area, build period, and main fuel below to calculate your estimate.
Loading property data...
Select Property Type
Select Main Fuel
Select Build Period
Mapped Category:
189019201950198020102026
Adjust Floor Area
Type your value directly or click and hold the up/down buttons to adjust. Press Enter to confirm.
SQM
We have just 3 simple questions for you
Have you renovated your home in the last 10 years to add insulation or double glazing to your windows?
Do you have a wet central heating system i.e. radiators or underfloor heating?
Do you have a hot water cylinder?
Good news! The ZEB is a match for your home.
Based on your estimated usage, a ZEB can comfortably heat your home.
While we aren't actively installing in your area today, we are expanding quickly. Leave your details below to join our priority waitlist and be first in line when we launch in your area.
Your home may not be a good fit for a ZEB
Based on our estimate, which considers your property size and available building records, your home's heat demand appears to be above the suitable range for a ZEB.
If you think this doesn't look right, you can check your latest energy bills and update the heat demand figure on this page. We'll then recheck your suitability and update your estimate.
ADDRESS:
Heat Demand
kWh*
✓ PerfectToo high
*assumes your renovation included insulation/window upgrades
Delivery Area
Covered
✓ Active installExpanding soon
Central Heating
Yes
✓ CompatibleSystem needed
Water Cylinder
Yes
✓ ExistingNew tank needed
Estimated Installed Cost
£2,500 Grant Included
Starting from £5,995
inc. VAT
Estimated running costs
Running Cost Breakdown & Assumptions
Compares fuel consumption, standing charges, and annual maintenance vs your current boiler.
Tariff: Optimised on cheapest flexible tariff ().
Click '?' to view full calculation breakdown
Greener
Save / year
Similar to current bills
Higher running costs
Reduces ~ kg CO2/yr
Ready to take the next step?
Enter your contact details below to get an email with your estimate or book a quick, no-obligation call with one of our heating experts.
On the call, we'll review your home details, answer any questions, and help turn this estimate into a tailored quote. We'll also email you a copy of your estimate and report straight away.
Want to be added to the waiting list?
If you'd like to be notified as soon as we launch in your area, enter your contact details below to join our priority waitlist.
We'll email you a copy of your initial estimate and suitability report right away, and drop you a message as soon as installation opens in your area.
Still think the ZEB is right for you or just want to stay in touch?
If your actual usage is over 14,000 kWh, the ZEB could still work if you have secondary heating (like a wood burner or heat pump), a hybrid setup, or a 3-phase electrical supply. Please fill out your details below and one of our heating specialists will get in touch to discuss your options.
Please enter a valid phone number (min 10 digits)
Please enter a valid email address
Optional
Optional
We may occasionally email you with useful information about ZEB suitability, costs and tepeo services. You can opt out at any time.
By proceeding, you agree that tepeo will use your details to respond to your enquiry in accordance with our Privacy Policy.
Your Next Step
✓ Ready to send your estimate✓ Choose email or booking to continue
Compatibility Check
What are your options?
If you are planning to install wet central heating, or want to explore bespoke arrangements with our specialists, our team is on hand to help.
Edit Heat Demand
If you think our estimate isn't quite right for your home, enter your actual annual heating demand below. You can usually find your annual gas or heating kWh on your recent energy bills.
kWh / yr
Calculation Transparency
Annual Running Cost Estimate & Assumptions
Important Notice on Running Cost Estimates
The cost and carbon figures shown are running cost estimates based on your inputs, typical home efficiencies, smart thermostat usage patterns, and weather data. Your actual experience and heating bills will vary depending on property insulation, household heating habits, and your specific energy tariffs. We provide estimated ranges to reflect natural variations in seasonal weather and occupancy.
How the annual costs compare
Cost Element
Current Boiler
tepeo ZEB Heat Battery
Fuel Consumption Cost
Energy for space heating & hot water
Based on tariff & ~85% boiler efficiency
Smart off-peak charging on
Standing Charges
Dedicated heating supply charges
Gas supply standing charge (~29.68p/day or ~£108/yr)LPG bulk tank rental (~£60-£70/year)£0 dedicated supply charge (bulk fuel deliveries)£0 extra (uses main electricity supply)
£0 extra (uses existing electricity meter)
Maintenance & Servicing
Annual care & upkeep
Typical annual boiler service or cover (~£120-£180)
Included in tepeo Care Plan
Estimated Total / Year
Net Estimated Annual Savings:
Flexible Electricity Tariff Assumptions
To achieve low running costs and take advantage of the ZEB's thermal storage, you will switch to a flexible time-of-use electricity tariff. The ZEB automatically charges when renewable electricity is cheapest on the grid (typically overnight) and supplies heat on demand without drawing peak-rate power.
EV Tariff (e.g. EDF GoElectric)
• 6.99p / kWh off-peak (23:00 - 06:00)
• 33.59p / kWh daytime (06:00 - 23:00)
*You may require an EV to access this tariff.
Heating Tariff (e.g. Octopus Cosy)
• 13.48p / kWh during cheap charge slots
• 41.24p / kWh peak periods
• 27.49p / kWh standard daytime
*The data is based on tariffs during the October-December 2026 Ofgem price cap period.
Current Boiler & Fuel Assumptions
• Mains Gas Baseline: Using 7.97p/kWh (National average Ofgem price cap: 1 October - 31 December 2026) and 85% typical gas boiler efficiency. Standing charge: 29.68p/day (~£108/yr).
• Heating Oil Baseline: Using 102.03p/litre (Government Domestic energy price indices, June 2026) and 85% typical oil boiler efficiency (typically no standing charge, fuel delivery charges apply).
• Solid Fuel Baseline: Modelled on heating oil equivalent cost (102.03p/litre) and 85% typical efficiency for automated central heating equivalence.
• LPG Baseline: Using 98p/litre (Based on online quote) and 85% typical LPG boiler efficiency, plus ~£60-£70/year tank rental charge.
• Direct Electric Baseline: Using 26.32p/kWh (National average Ofgem price cap: 1 October - 31 December 2026) and 100% direct electric efficiency (£0 dedicated standing charge, uses standard household electricity supply).
• Half-Hourly Optimisation: Modelling uses half-hourly charging optimisation over a typical year using real UK weather data from 2022-2024 and typical smart thermostat daily heating profiles. The Heat Battery is assumed to be inside the heated envelope of the building so heat loss contributes to heating the home.
Estimation Notes
The cost and carbon estimates here are estimates based on your inputs, a typical home, and standard usage patterns. Actual results will vary depending on property insulation, household habits, and your specific tariff. Ranges reflect expected variations in real-world outcomes.
Wet heating system: As your home does not currently have radiators or underfloor pipework, our heating engineer will also discuss options for installing wet central heating during your call.
Book a call with one of our experts
Choose a time that suits you and we'll talk through your home, your estimate and any questions you have about the ZEB.
✓ We've also emailed a copy of your initial estimate to
We're emailing your complete estimate and suitability report to . Please check your inbox shortly.
Why not book a call right now?
While you wait for your email, why not lock in a quick call with one of our heating experts? We can review your home's details together, answer any questions, and help turn your estimate into a bespoke installation quote.
Please choose your property type, floor area, build period, and main fuel below to calculate your estimate.
Loading property data...
Select Property Type
Select Main Fuel
Select Build Period
Mapped Category:
189019201950198020102026
Adjust Floor Area
Type your value directly or click and hold the up/down buttons to adjust. Press Enter to confirm.
SQM
We have just 3 simple questions for you
Have you renovated your home in the last 10 years to add insulation or double glazing to your windows?
Do you have a wet central heating system i.e. radiators or underfloor heating?
Do you have a hot water cylinder?
Good news! The ZEB is a match for your home.
Based on your estimated usage, a ZEB can comfortably heat your home.
While we aren't actively installing in your area today, we are expanding quickly. Leave your details below to join our priority waitlist and be first in line when we launch in your area.
Your home may not be a good fit for a ZEB
Based on our estimate, which considers your property size and available building records, your home's heat demand appears to be above the suitable range for a ZEB.
If you think this doesn't look right, you can check your latest energy bills and update the heat demand figure on this page. We'll then recheck your suitability and update your estimate.
ADDRESS:
Heat Demand
kWh*
✓ PerfectToo high
*assumes your renovation included insulation/window upgrades
Delivery Area
Covered
✓ Active installExpanding soon
Central Heating
Yes
✓ CompatibleSystem needed
Water Cylinder
Yes
✓ ExistingNew tank needed
Ready to take the next step?
Enter your contact details below to get an email with your estimate or book a quick, no-obligation call with one of our heating experts.
On the call, we'll review your home details, answer any questions, and help turn this estimate into a tailored quote. We'll also email you a copy of your estimate and report straight away.
Want to be added to the waiting list?
If you'd like to be notified as soon as we launch in your area, enter your contact details below to join our priority waitlist.
We'll email you a copy of your initial estimate and suitability report right away, and drop you a message as soon as installation opens in your area.
Still think the ZEB is right for you or just want to stay in touch?
If your actual usage is over 14,000 kWh, the ZEB could still work if you have secondary heating (like a wood burner or heat pump), a hybrid setup, or a 3-phase electrical supply. Please fill out your details below and one of our heating specialists will get in touch to discuss your options.
Please enter a valid phone number (min 10 digits)
Please enter a valid email address
Optional
Optional
We may occasionally email you with useful information about ZEB suitability, costs and tepeo services. You can opt out at any time.
By proceeding, you agree that tepeo will use your details to respond to your enquiry in accordance with our Privacy Policy.
Your Next Step
✓ Ready to send your estimate✓ Choose email or booking to continue
Compatibility Check
What are your options?
If you are planning to install wet central heating, or want to explore bespoke arrangements with our specialists, our team is on hand to help.
Edit Heat Demand
If you think our estimate isn't quite right for your home, enter your actual annual heating demand below. You can usually find your annual gas or heating kWh on your recent energy bills.
kWh / yr
Calculation Transparency
Annual Running Cost Estimate & Assumptions
Important Notice on Running Cost Estimates
The cost and carbon figures shown are running cost estimates based on your inputs, typical home efficiencies, smart thermostat usage patterns, and weather data. Your actual experience and heating bills will vary depending on property insulation, household heating habits, and your specific energy tariffs. We provide estimated ranges to reflect natural variations in seasonal weather and occupancy.
How the annual costs compare
Cost Element
Current Boiler
tepeo ZEB Heat Battery
Fuel Consumption Cost
Energy for space heating & hot water
Based on tariff & ~85% boiler efficiency
Smart off-peak charging on
Standing Charges
Dedicated heating supply charges
Gas supply standing charge (~29.68p/day or ~£108/yr)LPG bulk tank rental (~£60-£70/year)£0 dedicated supply charge (bulk fuel deliveries)£0 extra (uses main electricity supply)
£0 extra (uses existing electricity meter)
Maintenance & Servicing
Annual care & upkeep
Typical annual boiler service or cover (~£120-£180)
Included in tepeo Care Plan
Estimated Total / Year
Net Estimated Annual Savings:
Flexible Electricity Tariff Assumptions
To achieve low running costs and take advantage of the ZEB's thermal storage, you will switch to a flexible time-of-use electricity tariff. The ZEB automatically charges when renewable electricity is cheapest on the grid (typically overnight) and supplies heat on demand without drawing peak-rate power.
EV Tariff (e.g. EDF GoElectric)
• 6.99p / kWh off-peak (23:00 - 06:00)
• 33.59p / kWh daytime (06:00 - 23:00)
*You may require an EV to access this tariff.
Heating Tariff (e.g. Octopus Cosy)
• 13.48p / kWh during cheap charge slots
• 41.24p / kWh peak periods
• 27.49p / kWh standard daytime
*The data is based on tariffs during the October-December 2026 Ofgem price cap period.
Current Boiler & Fuel Assumptions
• Mains Gas Baseline: Using 7.97p/kWh (National average Ofgem price cap: 1 October - 31 December 2026) and 85% typical gas boiler efficiency. Standing charge: 29.68p/day (~£108/yr).
• Heating Oil Baseline: Using 102.03p/litre (Government Domestic energy price indices, June 2026) and 85% typical oil boiler efficiency (typically no standing charge, fuel delivery charges apply).
• Solid Fuel Baseline: Modelled on heating oil equivalent cost (102.03p/litre) and 85% typical efficiency for automated central heating equivalence.
• LPG Baseline: Using 98p/litre (Based on online quote) and 85% typical LPG boiler efficiency, plus ~£60-£70/year tank rental charge.
• Direct Electric Baseline: Using 26.32p/kWh (National average Ofgem price cap: 1 October - 31 December 2026) and 100% direct electric efficiency (£0 dedicated standing charge, uses standard household electricity supply).
• Half-Hourly Optimisation: Modelling uses half-hourly charging optimisation over a typical year using real UK weather data from 2022-2024 and typical smart thermostat daily heating profiles. The Heat Battery is assumed to be inside the heated envelope of the building so heat loss contributes to heating the home.
Estimation Notes
The cost and carbon estimates here are estimates based on your inputs, a typical home, and standard usage patterns. Actual results will vary depending on property insulation, household habits, and your specific tariff. Ranges reflect expected variations in real-world outcomes.
Wet heating system: As your home does not currently have radiators or underfloor pipework, our heating engineer will also discuss options for installing wet central heating during your call.
Book a call with one of our experts
Choose a time that suits you and we'll talk through your home, your estimate and any questions you have about the ZEB.
✓ We've also emailed a copy of your initial estimate to
We're emailing your complete estimate and suitability report to . Please check your inbox shortly.
Why not book a call right now?
While you wait for your email, why not lock in a quick call with one of our heating experts? We can review your home's details together, answer any questions, and help turn your estimate into a bespoke installation quote.
Heat pumps are a great solution for many homes, but every property – and every homeowner – is different.
Here’s why many people across the UK are switching to a heat battery boiler:
No outdoor unit
The ZEB is installed entirely indoors, designed to replace an existing boiler, so there's no external unit taking up garden or outdoor space.
Keep your existing heating
Designed to work with suitable existing radiators, pipework and underfloor heating.
Lower-disruption installation
A ZEB can often be installed in just 1-2 days, without redesigning your entire heating system.
Familiar central heating
Heat is delivered through your radiators when you need it, giving you a familiar heating experience without burning any fossil fuels.
So, what is a heat battery boiler?
Charges like a battery. Heats like a boiler.
The ZEB uses electricity to heat a high-density ceramic core and stores that energy until your home needs it.
Smart Charging works out when and how much to charge, helping make use of cheaper off-peak electricity. The stored heat is then delivered through your existing central heating.
Unlike a heat pump, there’s no outdoor unit. Unlike direct electric heating, the ZEB can store energy ahead of time rather than drawing all of its electricity at the moment you need heat.
Replacing an old heat pump with a heat battery boiler in Whitstable
Quick Summary: The Switch at a Glance The Property: 3-bedroom townhouse in Whitstable. The Problem: An existing exhaust air heat pump that was expensive... Read more
Kevin: A smart electric heating setup, with £2,500 off
Read about how the tepeo ZEB heat battery boiler helped Kevin complete his move away from gas. The Home: A detached, four-bedroom property in... Read more
If you’ve been considering a heat pump but the cost, installation or changes to your home are holding you back, the ZEB could offer a quicker, lower-disruption route to low-carbon heating.
As we head into the colder months, now is a good time to make the switch – before your current boiler breaks or installer availability gets busier.
Eligible customers can also currently get £2,500 off a ZEB through our Early Grant Match, making now an even better time to explore your options.
If your home looks like a good fit, you can talk to one of our experts if you have questions, or move straight to your Digital Home Assessment if you're ready.
2
Complete your Digital Home Assessment
Tell us a little more about your home and upload a few photos and videos. This gives our team or your tepeoPRO installer the information needed to assess your installation and prepare an accurate quote.
3
Receive your ZEB + installation quote
Once your assessment has been reviewed, you'll receive your quote. Take your time to look through everything, ask us any questions and decide whether you'd like to go ahead.
Please choose your property type, floor area, build period, and main fuel below to calculate your estimate.
Loading property data...
Select Property Type
Select Main Fuel
Select Build Period
Mapped Category:
189019201950198020102026
Adjust Floor Area
Type your value directly or click and hold the up/down buttons to adjust. Press Enter to confirm.
SQM
We have just 3 simple questions for you
Have you renovated your home in the last 10 years to add insulation or double glazing to your windows?
Do you have a wet central heating system i.e. radiators or underfloor heating?
Do you have a hot water cylinder?
Good news! The ZEB is a match for your home.
Based on your estimated usage, a ZEB can comfortably heat your home.
While we aren't actively installing in your area today, we are expanding quickly. Leave your details below to join our priority waitlist and be first in line when we launch in your area.
Your home may not be a good fit for a ZEB
Based on our estimate, which considers your property size and available building records, your home's heat demand appears to be above the suitable range for a ZEB.
If you think this doesn't look right, you can check your latest energy bills and update the heat demand figure on this page. We'll then recheck your suitability and update your estimate.
ADDRESS:
Heat Demand
kWh*
✓ PerfectToo high
*assumes your renovation included insulation/window upgrades
Delivery Area
Covered
✓ Active installExpanding soon
Central Heating
Yes
✓ CompatibleSystem needed
Water Cylinder
Yes
✓ ExistingNew tank needed
Estimated Installed Cost
£2,500 Grant Included
Starting from £5,995
inc. VAT
Estimated running costs
Running Cost Breakdown & Assumptions
Compares fuel consumption, standing charges, and annual maintenance vs your current boiler.
Tariff: Optimised on cheapest flexible tariff ().
Click '?' to view full calculation breakdown
Greener
Save / year
Similar to current bills
Higher running costs
Reduces ~ kg CO2/yr
Ready to take the next step?
Enter your contact details below to get an email with your estimate or book a quick, no-obligation call with one of our heating experts.
On the call, we'll review your home details, answer any questions, and help turn this estimate into a tailored quote. We'll also email you a copy of your estimate and report straight away.
Want to be added to the waiting list?
If you'd like to be notified as soon as we launch in your area, enter your contact details below to join our priority waitlist.
We'll email you a copy of your initial estimate and suitability report right away, and drop you a message as soon as installation opens in your area.
Still think the ZEB is right for you or just want to stay in touch?
If your actual usage is over 14,000 kWh, the ZEB could still work if you have secondary heating (like a wood burner or heat pump), a hybrid setup, or a 3-phase electrical supply. Please fill out your details below and one of our heating specialists will get in touch to discuss your options.
Please enter a valid phone number (min 10 digits)
Please enter a valid email address
Optional
Optional
We may occasionally email you with useful information about ZEB suitability, costs and tepeo services. You can opt out at any time.
By proceeding, you agree that tepeo will use your details to respond to your enquiry in accordance with our Privacy Policy.
Your Next Step
✓ Ready to send your estimate✓ Choose email or booking to continue
Compatibility Check
What are your options?
If you are planning to install wet central heating, or want to explore bespoke arrangements with our specialists, our team is on hand to help.
Edit Heat Demand
If you think our estimate isn't quite right for your home, enter your actual annual heating demand below. You can usually find your annual gas or heating kWh on your recent energy bills.
kWh / yr
Calculation Transparency
Annual Running Cost Estimate & Assumptions
Important Notice on Running Cost Estimates
The cost and carbon figures shown are running cost estimates based on your inputs, typical home efficiencies, smart thermostat usage patterns, and weather data. Your actual experience and heating bills will vary depending on property insulation, household heating habits, and your specific energy tariffs. We provide estimated ranges to reflect natural variations in seasonal weather and occupancy.
How the annual costs compare
Cost Element
Current Boiler
tepeo ZEB Heat Battery
Fuel Consumption Cost
Energy for space heating & hot water
Based on tariff & ~85% boiler efficiency
Smart off-peak charging on
Standing Charges
Dedicated heating supply charges
Gas supply standing charge (~29.68p/day or ~£108/yr)LPG bulk tank rental (~£60-£70/year)£0 dedicated supply charge (bulk fuel deliveries)£0 extra (uses main electricity supply)
£0 extra (uses existing electricity meter)
Maintenance & Servicing
Annual care & upkeep
Typical annual boiler service or cover (~£120-£180)
Included in tepeo Care Plan
Estimated Total / Year
Net Estimated Annual Savings:
Flexible Electricity Tariff Assumptions
To achieve low running costs and take advantage of the ZEB's thermal storage, you will switch to a flexible time-of-use electricity tariff. The ZEB automatically charges when renewable electricity is cheapest on the grid (typically overnight) and supplies heat on demand without drawing peak-rate power.
EV Tariff (e.g. EDF GoElectric)
• 6.99p / kWh off-peak (23:00 - 06:00)
• 33.59p / kWh daytime (06:00 - 23:00)
*You may require an EV to access this tariff.
Heating Tariff (e.g. Octopus Cosy)
• 13.48p / kWh during cheap charge slots
• 41.24p / kWh peak periods
• 27.49p / kWh standard daytime
*The data is based on tariffs during the October-December 2026 Ofgem price cap period.
Current Boiler & Fuel Assumptions
• Mains Gas Baseline: Using 7.97p/kWh (National average Ofgem price cap: 1 October - 31 December 2026) and 85% typical gas boiler efficiency. Standing charge: 29.68p/day (~£108/yr).
• Heating Oil Baseline: Using 102.03p/litre (Government Domestic energy price indices, June 2026) and 85% typical oil boiler efficiency (typically no standing charge, fuel delivery charges apply).
• Solid Fuel Baseline: Modelled on heating oil equivalent cost (102.03p/litre) and 85% typical efficiency for automated central heating equivalence.
• LPG Baseline: Using 98p/litre (Based on online quote) and 85% typical LPG boiler efficiency, plus ~£60-£70/year tank rental charge.
• Direct Electric Baseline: Using 26.32p/kWh (National average Ofgem price cap: 1 October - 31 December 2026) and 100% direct electric efficiency (£0 dedicated standing charge, uses standard household electricity supply).
• Half-Hourly Optimisation: Modelling uses half-hourly charging optimisation over a typical year using real UK weather data from 2022-2024 and typical smart thermostat daily heating profiles. The Heat Battery is assumed to be inside the heated envelope of the building so heat loss contributes to heating the home.
Estimation Notes
The cost and carbon estimates here are estimates based on your inputs, a typical home, and standard usage patterns. Actual results will vary depending on property insulation, household habits, and your specific tariff. Ranges reflect expected variations in real-world outcomes.
Wet heating system: As your home does not currently have radiators or underfloor pipework, our heating engineer will also discuss options for installing wet central heating during your call.
Book a call with one of our experts
Choose a time that suits you and we'll talk through your home, your estimate and any questions you have about the ZEB.
✓ We've also emailed a copy of your initial estimate to
We're emailing your complete estimate and suitability report to . Please check your inbox shortly.
Why not book a call right now?
While you wait for your email, why not lock in a quick call with one of our heating experts? We can review your home's details together, answer any questions, and help turn your estimate into a bespoke installation quote.
Please choose your property type, floor area, build period, and main fuel below to calculate your estimate.
Loading property data...
Select Property Type
Select Main Fuel
Select Build Period
Mapped Category:
189019201950198020102026
Adjust Floor Area
Type your value directly or click and hold the up/down buttons to adjust. Press Enter to confirm.
SQM
We have just 3 simple questions for you
Have you renovated your home in the last 10 years to add insulation or double glazing to your windows?
Do you have a wet central heating system i.e. radiators or underfloor heating?
Do you have a hot water cylinder?
Good news! The ZEB is a match for your home.
Based on your estimated usage, a ZEB can comfortably heat your home.
While we aren't actively installing in your area today, we are expanding quickly. Leave your details below to join our priority waitlist and be first in line when we launch in your area.
Your home may not be a good fit for a ZEB
Based on our estimate, which considers your property size and available building records, your home's heat demand appears to be above the suitable range for a ZEB.
If you think this doesn't look right, you can check your latest energy bills and update the heat demand figure on this page. We'll then recheck your suitability and update your estimate.
ADDRESS:
Heat Demand
kWh*
✓ PerfectToo high
*assumes your renovation included insulation/window upgrades
Delivery Area
Covered
✓ Active installExpanding soon
Central Heating
Yes
✓ CompatibleSystem needed
Water Cylinder
Yes
✓ ExistingNew tank needed
Ready to take the next step?
Enter your contact details below to get an email with your estimate or book a quick, no-obligation call with one of our heating experts.
On the call, we'll review your home details, answer any questions, and help turn this estimate into a tailored quote. We'll also email you a copy of your estimate and report straight away.
Want to be added to the waiting list?
If you'd like to be notified as soon as we launch in your area, enter your contact details below to join our priority waitlist.
We'll email you a copy of your initial estimate and suitability report right away, and drop you a message as soon as installation opens in your area.
Still think the ZEB is right for you or just want to stay in touch?
If your actual usage is over 14,000 kWh, the ZEB could still work if you have secondary heating (like a wood burner or heat pump), a hybrid setup, or a 3-phase electrical supply. Please fill out your details below and one of our heating specialists will get in touch to discuss your options.
Please enter a valid phone number (min 10 digits)
Please enter a valid email address
Optional
Optional
We may occasionally email you with useful information about ZEB suitability, costs and tepeo services. You can opt out at any time.
By proceeding, you agree that tepeo will use your details to respond to your enquiry in accordance with our Privacy Policy.
Your Next Step
✓ Ready to send your estimate✓ Choose email or booking to continue
Compatibility Check
What are your options?
If you are planning to install wet central heating, or want to explore bespoke arrangements with our specialists, our team is on hand to help.
Edit Heat Demand
If you think our estimate isn't quite right for your home, enter your actual annual heating demand below. You can usually find your annual gas or heating kWh on your recent energy bills.
kWh / yr
Calculation Transparency
Annual Running Cost Estimate & Assumptions
Important Notice on Running Cost Estimates
The cost and carbon figures shown are running cost estimates based on your inputs, typical home efficiencies, smart thermostat usage patterns, and weather data. Your actual experience and heating bills will vary depending on property insulation, household heating habits, and your specific energy tariffs. We provide estimated ranges to reflect natural variations in seasonal weather and occupancy.
How the annual costs compare
Cost Element
Current Boiler
tepeo ZEB Heat Battery
Fuel Consumption Cost
Energy for space heating & hot water
Based on tariff & ~85% boiler efficiency
Smart off-peak charging on
Standing Charges
Dedicated heating supply charges
Gas supply standing charge (~29.68p/day or ~£108/yr)LPG bulk tank rental (~£60-£70/year)£0 dedicated supply charge (bulk fuel deliveries)£0 extra (uses main electricity supply)
£0 extra (uses existing electricity meter)
Maintenance & Servicing
Annual care & upkeep
Typical annual boiler service or cover (~£120-£180)
Included in tepeo Care Plan
Estimated Total / Year
Net Estimated Annual Savings:
Flexible Electricity Tariff Assumptions
To achieve low running costs and take advantage of the ZEB's thermal storage, you will switch to a flexible time-of-use electricity tariff. The ZEB automatically charges when renewable electricity is cheapest on the grid (typically overnight) and supplies heat on demand without drawing peak-rate power.
EV Tariff (e.g. EDF GoElectric)
• 6.99p / kWh off-peak (23:00 - 06:00)
• 33.59p / kWh daytime (06:00 - 23:00)
*You may require an EV to access this tariff.
Heating Tariff (e.g. Octopus Cosy)
• 13.48p / kWh during cheap charge slots
• 41.24p / kWh peak periods
• 27.49p / kWh standard daytime
*The data is based on tariffs during the October-December 2026 Ofgem price cap period.
Current Boiler & Fuel Assumptions
• Mains Gas Baseline: Using 7.97p/kWh (National average Ofgem price cap: 1 October - 31 December 2026) and 85% typical gas boiler efficiency. Standing charge: 29.68p/day (~£108/yr).
• Heating Oil Baseline: Using 102.03p/litre (Government Domestic energy price indices, June 2026) and 85% typical oil boiler efficiency (typically no standing charge, fuel delivery charges apply).
• Solid Fuel Baseline: Modelled on heating oil equivalent cost (102.03p/litre) and 85% typical efficiency for automated central heating equivalence.
• LPG Baseline: Using 98p/litre (Based on online quote) and 85% typical LPG boiler efficiency, plus ~£60-£70/year tank rental charge.
• Direct Electric Baseline: Using 26.32p/kWh (National average Ofgem price cap: 1 October - 31 December 2026) and 100% direct electric efficiency (£0 dedicated standing charge, uses standard household electricity supply).
• Half-Hourly Optimisation: Modelling uses half-hourly charging optimisation over a typical year using real UK weather data from 2022-2024 and typical smart thermostat daily heating profiles. The Heat Battery is assumed to be inside the heated envelope of the building so heat loss contributes to heating the home.
Estimation Notes
The cost and carbon estimates here are estimates based on your inputs, a typical home, and standard usage patterns. Actual results will vary depending on property insulation, household habits, and your specific tariff. Ranges reflect expected variations in real-world outcomes.
Wet heating system: As your home does not currently have radiators or underfloor pipework, our heating engineer will also discuss options for installing wet central heating during your call.
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