PHAM NEWS | JUNE 2026 24 Products in Action Low-carbon update for holiday cottages


Historic holiday cottages managed by English Heritage are being fitted with air source heat pumps as part of a wider effort to reduce carbon emissions across the charity’s estate. Vaillant partnered with English


Heritage to help the conservation charity, which looks after more than 400 historic sites in England, reach net zero carbon emissions by 2040 under its long-term sustainability strategy. The project saw the installation


of Vaillant’s aroTHERM plus air source heat pump systems at eight of its most popular holiday cottage destinations, replacing legacy oil and gas boilers. Installations have already been


completed at Coastguards Cottage, a three-bedroom property on the island of Lindisfarne, and at Fort House, a two-bedroom cottage at St Mawes Castle in Cornwall. A further six properties within the English Heritage holiday cottage


portfolio are scheduled to receive upgrades as part of this ongoing programme. The project demonstrates how


modern heating technology can be successfully integrated into existing housing stock, helping to reduce carbon emissions while maintaining guest comfort and operational simplicity. James Fowler, marketing &


Wastewater management on M1


Heatrak Technical Services has been appointed to support a major refurbishment at the northbound Leicester Forest East Services on the M1, providing temporary facilities for ten weeks. Modular WC


blocks with 12 toilets were installed to maintain customer access. With no excavation permitted


and pipework required above- ground, wastewater needed to be pumped over 15m to the nearest drainage point. Heatrak turned to Saniflo for a solution. Following a site survey and


flow calculations, a three-phase Sanicubic 2 VX lifting station was specified. Installed behind the temporary units, the system collected waste from all blocks and discharged it via 4" pipework to the mains. Featuring twin vortex pumps


to prevent clogging and ensure reliability, the above-ground unit was quick to install and operated seamlessly throughout the project. Designed for high-demand


environments, the Sanicubic 2 VX delivers efficient wastewater management where gravity drainage isn’t possible. ◼ phamnews.co.uk/626/24


strategy director at Vaillant, says: “Working with English Heritage highlights how heat pump technology can play a central role in decarbonising properties. These projects show that with careful specification and system design, renewable heating can be integrated sensitively and effectively.” ◼ phamnews.co.uk/626/22


Heat pump water heaters in new-builds


Ariston is supplying its Nuos Plus Wi-Fi air source heat pump water heaters for homes at the Climate Innovation District in Leeds, a range of new-build properties designed and built in line with key Passivhaus principles. The product, rated A+ for energy


efficiency, has a coefficient of performance of up to 3.14 and can heat water to 62°C. All the properties are linked up to a site- wide photovoltaic (PV) installation, enabling them all to share in the generation of electricity on site and further reduce reliance on the grid. The systems are also designed to work alongside MVHR systems,


which maintain indoor air quality while retaining warmth in line with key Passivhaus principles. Rachel Luffman, head of design for Climate Innovation District, comments: “The cylinder in the Nuos Plus Wi-Fi air source heat pump is large enough to support a family home, and the ventilation needs for it can coordinate with those needed for the mechanical ventilation heat recovery system.” ◼ phamnews.co.uk/626/23


Demineralised water treatment success


To tackle the effects of hard water on low- temperature heating systems, Magnetic International has supplied demineralised water treatment equipment for a residential heat pump development in Newcastle upon Tyne. The project involved the installation of 15kW heat


pump systems with underfloor heating in a number of new-build homes by Bill Hewison Bespoke Homes. Local hard water conditions raised concerns about scale build-up, corrosion and long-term system efficiency. To address this, mobile demineralisation filling


stations and refill cartridges from Magnetic International were used during commissioning and subsequent system top-ups. The technology removes mineral ions from water before it enters the heating circuit, reducing conductivity and limiting the formation of deposits within components such as heat exchangers and pumps. This approach met water quality requirements


while avoiding the need for chemical dosing during commissioning. The cartridge-based system also included colour indicators designed to show when replacements were needed. Industry guidance, including VDI 2035 and


BSRIA BG29, highlights the importance of water quality management in closed heating systems, particularly as the use of heat pumps and underfloor heating increases. The mobile filling stations have been developed for small to medium- sized heating systems, including heat pumps, where engineers may require a portable alternative to fixed plant room equipment. For many applications, particularly where small


quantities of treated water are required regularly, this type of solution can provide a straightforward and cost-effective approach to an essential aspect of system care. ◼ phamnews.co.uk/626/25


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