Whether you need a new boiler now or you’re exploring ways to make your home lower carbon, start with what matters to you and we’ll help you from there.
A heat battery boiler, like the tepeo ZEB, is a low carbon boiler that stores energy as heat for later, rather than relying on electricity only at the moment your home needs heating.
The ZEB charges a high-density ceramic core using electricity, then releases that stored heat through your existing radiators or underfloor heating when you need it.
Unlike a heat pump, it doesn’t need an outdoor unit. And unlike a standard electric boiler, it can charge ahead of time when electricity is cheaper – making it a practical and affordable way for suitable homes to move away from gas, oil or LPG.
Founded in 2018 by engineer Johan du Plessis, tepeo was created to give UK households more choice when moving away from fossil-fuel heating.
The ZEB is designed, developed and manufactured at our base in Wokingham, Berkshire, bringing together British engineering and smart energy technology to create a practical new way to heat our homes.
We’re also a certified B Corp and recognised as an Ethical Consumer Best Buy, reflecting our commitment to building better heating technology responsibly.
Climate change is one of the biggest challenges we face, and heating our homes has an important part to play in tackling it.
That’s why we’re focused on helping more homes move away from fossil fuels and towards cleaner electricity. We believe the future is electric — and we’re building practical heating technology to help make that transition possible.
We want to make switching to cleaner heating more accessible. That’s why we’re currently offering £2,500 off the cost of a ZEB through our Early Grant Match – bringing forward the support soon to be available through the government’s Boiler Upgrade Scheme.
It’s our way of helping more households make the move away from fossil fuels sooner.
The ZEB is designed for suitable homes with wet central heating and can be particularly useful if you want to move away from fossil fuels without installing an outdoor unit or carrying out a larger heating retrofit.
It typically works best where you have:
A wet central heating system
Radiators or underfloor heating that the ZEB can connect to.
Space for the ZEB
Suitable indoor space. The ZEB is versatile and can be installed in a wide variety of indoor locations.
Suitable heat demand
Your home's estimated annual heating and hot water demand within the ZEB's suitable range.
A smart meter and suitable tariff
Access to a smart meter and a time-of-use tariff so the ZEB can make the most of cheaper off-peak electricity.
Check if your home is suitable
Complete our quick, 30 second property check to see if the tepeo heat battery boiler could work in 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
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.
If your home looks like a good fit for a ZEB, you can choose how you'd like to continue. Talk to one of our experts if you have questions, or move straight on 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.
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Fully trained installers for every ZEB installation.
A great heating system starts with a great installation. That’s why we work closely with trusted tepeoPRO installers, giving them dedicated training, technical support and the tools they need to install every ZEB with confidence.
Our team is there to support both you and your installer before, during and after installation – helping everything run as smoothly as possible.
From the way your ZEB is fitted to the support you receive afterwards, you can feel confident your home is in good hands.
Latest updates, advice and insights from tepeo – covering our heat battery boiler, low-carbon home heating, industry news and practical guidance for homeowners.
