Heat Pumps

Researchers in the United Kingdom found that thermostatic radiator valves can reduce air-source heat pump space heating energy use by 6–8% without affecting system efficiency when used correctly. TRVs must be applied carefully in well-designed, balanced systems with at least one open flow path, as they mainly serve as a secondary tool for room-level comfort control rather than a replacement for proper heat pump design and low flow temperature operation.

The government’s electrification plan, presented last week, includes a goal to double heat pump deployment in France by 2030, potentially benefiting the residential photovoltaic sector.

The German manufacturer said that its new air-to-water heat pump system uses propane as a refrigerant and is available in three variants with outputs of 5 kW, 7 kW, and 11 kW. The new product can reportedly achieve a coefficient of performance of up to 4.93.

The Italian manufacturer has launched a compact range of propane air-to-water heat pumps for heating, cooling, and domestic hot water in residential and light commercial applications, offering up to 15.5 kW heating capacity, a seasonal coefficient of performance of up to 5.18, and water temperatures up to 80 C.

San Francisco-based Merino Energy has launched the Merino Mono, a plug-and-play indoor heat pump that can be installed in under an hour and is priced at a flat $3,800 including installation.

Adana-based WHS introduced a PV-powered water heating system that operates without an inverter, using 1.6 kW of direct DC solar input with integrated MPPT. The system supports hybrid operation with a 2 kW AC backup, runs at extra-low voltage of less than 50 V, delivers around 3 kWh/day of thermal energy, and heats water to 65–85 C for residential and small commercial use.

Lambda Wärmepumpen GmbH said its Eureka heat pump series uses a patented fluid mechanics system that reportedly improves heat transfer by four to six times while maintaining a temperature difference of just 3 K between the air and the refrigerant. Its seasonal coefficient of performance ranges from 4.50 to 6.10.

Midea has launched a compact indoor air-source heat pump for retrofit and space-constrained homes. The R290-based system offers up to 4.45 kW output, a coefficient of performance of 4.5 and smart PV-compatible controls.

Research from Germany analyzed sentiment in online news coverage to explore how heat pumps are portrayed in German public discourse. It found that while public perception is generally positive, it is neither uniform nor stable, and dipped significantly during debates around Germany’s heating law in 2023.

Designed for commercial and multi-residential buildings, the Aqua‑G EVO heat pump can replace gas boilers, cascade up to eight units, and integrate with Panasonic’s complete HVAC ecosystem.