According to Hewer, the unit could reduce cost, waste and disruption in residential retrofit projects – and is already in use across 1,000 homes
Hewer, a sustainable heating solutions provider, has launched Heat Saviour, a pre-assembled unit designed to simplify the installation and maintenance of heat pump systems. According to the company, the technology could save up to £2,000 per installation by reducing the need to overhaul existing heating systems.
The launch comes amid a national push to scale up heat pump adoption. The UK government aims to install 600,000 heat pumps annually by 2028 as part of its net zero strategy. Yet, according to the Heat Pump Association, just 100,000 units were sold in 2023, prompting the government to double the Boiler Upgrade Scheme to £295 million and increase public awareness of the £7,500 heat pump grant.
Stuart Hesk, director at Hewer, said: “Installing and retrofitting heat pumps can be complex, costly and disruptive. They are often designed with non-universal parts, requiring entire heating systems to be ripped out – systems that could have years of use left in them.
“Heat Saviour is a much smarter and cheaper way for engineers to install and maintain a heat pump, making property management easier and improving residential satisfaction. We saw the huge amounts of unnecessary waste, cost and downtime that installing and retrofitting heat pumps was causing, and so, as a customer-first business, we set about inventing a solution to tackle these issues.”
The Heat Saviour unit sits beneath a standard hot water cylinder, transferring heat from the pump via a plate exchanger to power the central heating indirectly. Unlike conventional systems, it uses a dual-circuit loop, allowing the heat pump to operate independently of the home’s existing heating system. According to Hewer, this decouples the system from proprietary parts and enables the use of off-the-shelf components, speeding up installation and simplifying maintenance.
The company states that glycol usage is reduced by 80%, as it circulates only through the heat pump loop. This allows radiator maintenance without the need to drain or replace the fluid. The system also includes a built-in backup heating element, which can be controlled manually or remotely using Vericon Systems technology—designed to minimise disruption during maintenance and improve reliability for vulnerable residents.
Over 1,000 social housing properties across the South West have already adopted the unit, including schemes managed by Two Rivers Housing, Bromford, Green Square Accord, Rooftop Housing Group, Community Housing and Cottsway Housing Association.
Daniel McNally, director at EcoHeat Plumbing, Heating and Renewables, said: “Heat Saviour has now become a standard part of our toolkit for every suitable heat pump installation. It delivers on every front, lower installation costs, simpler maintenance and enhanced homeowner satisfaction. For us, it’s more than a product, it enables better service and advances system design.”
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