Social landlords

Replace gas boilers with renewables for domestic hot water – transition to net zero by 2035

Sunamp thermal batteries are a low carbon, reliable, space-saving alternative to traditional hot water cylinders.

This means you can install heat pumps where they don’t normally fit since hot water cylinders aren’t required.

You’ll cut carbon emissions and reduce maintenance costs across your housing stock.

Tried and tested in tower blocks and low-density housing around the UK, installation is quick and there’s no need for residents to move out.

Ideal for large-scale retrofit or new-build projects where space is at a premium.

Space-saving: up to x4 smaller than hot water cylinder being replaced

There’s often limited space inside homes which rules out installing bulky hot-water systems (and the associated pipework) when looking to use heat pumps instead of gas boilers.

The solution is an integrated system with a Sunamp thermal battery fitting neatly in a cupboard and being charged by renewable energy from an air-source or ground-source heat pump.

Energy efficiency improves by storing heat generated when electricity is cheaper and releasing it when it is needed. Residents enjoy hot water on demand while using less energy.

A Sunamp thermal battery inside a small cupboard

As seen on Fully Charged Show Home Series

Instead of having the old boiler in the kitchen, you’ve got this new technology in the cupboard. It’s unobtrusive and it works. And that’s the bottom line.

Nigel Wilson

Chief Executive of housing association Gentoo Group

Watch the interview with Sunamp and Gentoo Group about the ‘Core 364’ gas replacement programme for seven tower blocks in Sunderland.

Lower maintenance costs

Thermal batteries require no regulatory annual maintenance – unlike domestic gas boilers and unvented cylinders – and greatly simplify installation. Our batteries come with a market-leading 10-year warranty on the heating element.

No legionella testing is needed since each battery holds less than 5 litres of water.

What’s more, the batteries’ compact size releases storage space in each home which helps you meet mandatory space standards.

Low and zero carbon technology in use

Tackle fuel poverty

Retirement homes, Midlothian, Scotland
The HeatShare project shows how elderly residents use less energy for hot water with thermal batteries in their homes as part of five micro-scale district heating networks.

Hot water on demand

Solar panels on a house part of the EastHeat project
Multi-sized homes, central Scotland
Residents of the EastHeat project like that Sunamp batteries give them hot water at mains pressure on demand. They also like that the slimline batteries free up cupboard space.

 Retrofit to decarbonise

High-rise apartments, Sunderland
Here, the thermal battery and heat pump combination cut CO2 emissions by an estimated 420 tonnes per year – or nearly 70% – by enabling gas supplies to be removed from 364 homes.

Let’s discuss renewables instead of gas boilers and net zero emission roadmaps

Our specification team are ready to guide you