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Technology & Products
Johnson Controls unveils industrial heat pump with 122 C output The Sabroe HitemHP uses butane or isobutane as its refrigerant and delivers between 100 kW and 1 MW of heating capacity. Johnson Controls says the single-stage system can operate at loads as low as 18% of its rated capacity.
Emiliano Bellini
21 hours ago
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Research & Development
Shower wastewater heat pump achieves year-round COP of up to 4.1 Chinese researchers tested a hybrid shower wastewater- and air-source heat pump at university dormitories, recording a stable monthly COP of 3.4 to 4.1 over one year. The system cut annual carbon dioxide emissions by up to 77.77% and offered lower life-cycle costs than conventional boilers under typical market conditions.
Lior Kahana
23 hours ago
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Technology & Products
Trane releases vertical-stack heat pumps for multi-story buildings Trane has updated its 0.75-ton to 3-ton Axiom vertical-stack water-source heat pumps with an optional factory-installed energy-recovery ventilator and a new 1.65-meter cabinet. The R-454B units deliver efficiencies of up to 16 EER and feature a backward-compatible, removable chassis for easier replacement and servicing.
Emiliano Bellini
Sep 17, 2026
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Research & Development
LG tests heat pumps with P2H hot-water system in apartment building LG Electronics is testing apartment heat pumps alongside a centralized power-to-heat hot-water system at an occupied residential building on South Korea’s Jeju Island. The pilot will use surplus renewable electricity to produce and store heat, with operational testing scheduled to begin in December.
Emiliano Bellini
Sep 16, 2026
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Technology & Products
Rheem launches air-to-water heat pumps for multifamily houses Rheem’s Torin commercial air-to-water heat pumps achieve a COP of up to 4.5. The units can also deliver outlet-water temperatures of up to 65.6 C.
Emiliano Bellini
Sep 15, 2026
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Research & Development
Photovoltaic-thermal heat pump based on bio-based surface coating achieves 77.32% overall efficiency Iraqi researchers have developed a PVT heat pump featuring a bio-based TiO₂–linseed-oil coating and three alternative refrigerants. The system achieved up to 77.32% overall efficiency and reduced PV module temperatures by as much as 34 C.
Lior Kahana
Sep 14, 2026
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Technology & Products
Whspr launches 4 kW propane heat pump for space-constrained homes The Dutch startup’s new 4 kW R290 monobloc heat pump is designed for terraced houses and can operate on a standard 230 V electrical supply. The unit has a SCOP of 4.51 and a stated sound power level of 50.8 dB(A).
Emiliano Bellini
Sep 09, 2026
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Research & Development
New optimization method improves heat pump sizing by accounting for part-load efficiency Austrian researchers have developed an optimization framework that accounts for part-load efficiency when sizing and operating heat pumps, enabling more realistic system planning. A case study in Innsbruck found the approach could cut electricity consumption by 4.5% and annual costs by 2.9%, while relaxed formulations significantly reduced computation times.
Lior Kahana
Sep 08, 2026
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Technology & Products
Hitachi launches CO2 heat pump water heaters with solar-friendly tariff controls Hitachi has introduced its Y-series EcoCute CO2 heat pump water heaters in Japan, with 370-liter and 460-liter models set to launch from November 2026. The upgraded range adds expanded support for daytime electricity tariffs and PV-linked energy management, alongside a five-year manufacturer warranty.
Emiliano Bellini
Sep 07, 2026