Best Heat Pumps 2026

COP (Coefficient of Performance) measures efficiency: a COP of 3.5 means 3.5 kWh of heat or cooling delivered per 1 kWh of electricity used. Compare this to electric resistance heating (COP 1.0) or gas (effective COP ~0.9). A heat pump with COP 3.5 reduces your heating electricity cost to roughly 28% of what resistance heating would cost. In the tropics the more relevant metric is cooling — look for EER or SEER alongside COP.

Absolutely. Heat pumps are highly efficient for cooling as well as heating. In tropical and subtropical climates across Southeast Asia, a modern inverter-driven air-to-air heat pump (essentially a premium split AC) provides efficient air conditioning at SEER 18–26+, using far less electricity than non-inverter units. In Australia, the same technology covers both summer cooling and winter heating — it is the dominant HVAC for new housing. Heat pump hot water (air-to-water for DHW) is especially well-suited to the region's warm ambient air.

Yes — this is the ideal combination. Solar powers your heat pump during peak daytime cooling load, reducing grid draw. With a battery, stored solar can also run the heat pump at night. Tropical-climate homes see the biggest overlap between PV production and cooling demand — essentially every sunny hour is also an AC hour. A properly sized solar + heat pump system can achieve near-zero net energy cost for both electricity and climate control.

Australia offers Small-scale Technology Certificates (STCs) for heat pump hot water (HPWH) systems under the federal Small-scale Renewable Energy Scheme — typically worth AUD $800–$1,600 depending on system size, zone, and STC price. Victoria's Solar Homes programme adds rebates for HPWH. NSW runs the Energy Savings Scheme which subsidises installers. Reverse-cycle air-conditioning (space heating/cooling) is covered under state schemes like VEU (VIC) and ESS (NSW), typically assigned to the installer as a point-of-sale discount.

For space cooling, standard split-type inverter AC (effectively a heat pump) is permitted in HDB flats and must be installed on the designated AC ledge with a licensed contractor; BCA/HDB rules govern external unit placement, drainage, and noise. Heat pump water heaters are permitted but require proper condensate drainage and electrical safety certification — they are usually installed in the service balcony or kitchen. Condo installations additionally require MCST approval. Freon type must be compliant R32 or R290 under NEA guidelines.

R32 has a much lower Global Warming Potential (675) than the older R410A (2,088), uses roughly 30% less refrigerant charge for the same capacity, and runs more efficiently in high ambient temperatures — exactly the conditions across SEA. Daikin, Mitsubishi, Panasonic, and Haier have largely transitioned residential ranges to R32. A small number of premium units now use R290 (propane, GWP 3) which is even better environmentally but has flammability handling requirements. Avoid new-purchase R410A units — they are being phased down under the Kigali Amendment.