Installed from £8995 +VAT

Affordable heating, lowering your carbon footprint

The tepeo Zero Emission Boiler (ZEB®)


Around 17% of all UK carbon emissions currently come from heating our homes!

The tepeo Zero Emission Boiler (ZEB) is a low carbon alternative to a gas or oil boiler - it heats your home affordably while lowering your carbon footprint and supporting renewable generation.

The ZEB is a plug-n-play zero emission replacement for your existing boiler. It works with your hot water tank to deliver low carbon and low cost heating just like your current boiler.

Zero Emissions & Low Carbon

How Does It Work?

tepeo Zero Emission Boiler

Using off-peak electricity, the ZEB charges up when electricity is cheaper and greener, heating up a thermal core inside the ZEB. This stores energy until it is needed and releases it when your thermostat calls for heat (either for heating or hot water). You can keep your existing controls, pipework, radiators and cylinder - making the ZEB a very simple installation compared to many other low carbon options.

The Smart Part

The ZEB’s intelligent charging algorithm looks at your tariff, the weather, the grid carbon intensity and how much heat your home uses to automatically charge up - keeping running costs & carbon low, while avoiding wasted heat.

Controlled From Your Phone

The tepeo app is designed to make managing and monitoring your ZEB easy, it also allows you to set it up and leave it to do the work for you. The app helps you create a comfortable home whilst saving energy - good for your wallet and the environment.

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Benefits of the tepeo ZEB

Eco Smart Heat

Zero Emissions

Unlike a fossil fuel burning boiler, with a ZEB you don’t need a flue because there are zero emissions.

Minimal Disruption

A typical installation is 1-2 days and will work with your existing radiators and wet underfloor heating system.

Low Carbon

The ZEB uses low carbon electricity to charge up, then delivers heat on demand.


The ZEB combines grid carbon intensity, weather forecasts & heat demand to automatically calculate when & how much to charge.


The ZEB works with any tariff, but makes the most of 'off peak' rates to charge up cheaply.

No Outdoor Space Needed

The ZEB works well in smaller homes. Ideal heat demand: 3-12,000 kwhs.

Frequently Asked Questions

tepeo Zero Emission Boiler

We have put together some answers to the questions we get asked the most by our customers who are thinking about installing the tepeo Zero Emission Boiler. Hopefully these answer all the questions you have but if you have some more please feel free to get in touch with our experts anytime.

How much energy does it store?

40kWh of usable thermal energy.

How long does it take to charge?

Just over 4 hours from empty. It can deliver heating after half an hour (from cold).

What temperature water can it supply?

Any temperature up to 80°C - your current boiler won’t be higher than this so you will notice no difference.

How efficient is it?

The ZEB converts 100% of its electricity consumption into heat which will contribute to the heating of your home. When installed inside the thermal envelope of the home the ZEB is classed as 100% efficient.

What are the dimensions of the ZEB?

98cm (height) x 60cm (width) x 66cm (deep) - but it needs clearance of 7cm above and 5cm either side.

How heavy is it?


How long will it last?

We have designed the ZEB to last 20+ years.

How often will it need servicing?

No routine servicing required. Our monitoring systems tell us if we need to address anything.

Can ZEB draw electricity at the same time as my EV charger?

Yes, a typical charger will draw 30A, the ZEB 40A, so together 70A - less than the typical 100A household limit.

I have solar PV, can I use the excess to charge the ZEB?

This is currently in BETA trials and will be available from spring 2023.

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Comments From Our Customers

Eco Smart Heat Testimonials

  • Very pleased with Eco Smart Heat. From the initial enquiry through to planning, delivery, installation and handover the service was excellent.

    Rare these days to find such a great company that offer prices that could not be matched anywhere else.

    Steve Kirby
  • Ecosmartheat have fitted a sunamp heater for me. It was done very efficiently, turned up on time etc. Sorted out little problems on the way (getting it to work so that I can use either my existing oil boiler if I want, or the electric, and sorting a problem with the wiring).

    Also much cheaper and more helpful than a nearer supplier.

    Ruth Blake
  • Very Pleased with the fantastic job done by the guys. They installed our Sunamp heat battery in 2 days including removing old heating system, radiators, tanks etc with minimum disruption and a thoroughly professional attitude.

    Excellent problem solving too working out our antiquated old system. Best thing, all the work was covered by the original quoted price, no hidden extras.

    Thanks very much Eco Smart Heat. Highly recommended.

    Vic W
  • Excellent service from start to finish. Contacted Ben who talked me through the process and organised delivery and installation of Sunamp. Even squeezed me in before Christmas, which was very much appreciated.

    Richard came first thing as promised to install, explaining the process of the fit, making sure I was happy with everything. Very friendly and accommodating guys would definitely recommend their service and product.

  • This is a company with great customer service and competitive pricing which provides a service nationwide. From the initial phone call enquiry to having the unit delivered, immersion heater removed & Thermino 150e installed, the email and phone communication was great.

    The installation was booked within 2 weeks. I have now saved loads of space by putting my washer and dryer into the cupboard where my Thermino is. The company also went above any beyond their normal job role by providing and installing an updated timing switch and the installation of a tee valve to relocate my washer.

    David Tomlinson

Why are we better value?

Eco Smart Heat

We charge a fair price for our products and services so perhaps you should be asking our competitors why they cost more than us?

We do not employ pushy sales executives and we do not spend big on marketing. Why? because our prices, experienced team and products sell themselves.

Compare any of our prices against our competitors and you will find us to be better value with a better service.

We are an independent, family run business with engineers that have over 20 year's experience in the industry. If you would like a free survey and a fair price, contact us today.

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