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The best energy & heating companies of 2026
Top 10 of 33 scored energy & heating companies, ranked by TrustScore — a blend of verified customer reviews and independent AI trust analysis. Updated July 2026.
- 1Vaillant4.0 / 5 · Great0 reviews
Vaillant is a leading manufacturer of boilers, heat pumps, and heating systems for residential and commercial use in the UK.
- 2Baxi3.5 / 5 · Great0 reviews
Baxi manufactures and supplies heating and hot water solutions, including boilers, air source heat pumps, cylinders, and related accessories.
- 3Fischer3.1 / 5 · Average0 reviews
Fischer is a UK-based manufacturer and supplier of German electric home heating systems, offering modern electric radiators and heating solutions for residential use.
- 4GreenHeats3.0 / 5 · Average0 reviews
A sustainable installation technology company serving residential and commercial properties in the Randstad region of the Netherlands, specializing in energy-efficient heating and …
- 5FavorCool3.0 / 5 · Average0 reviews
FavorCool is a Belgian installer of air conditioning systems, heat pumps, and solar panels, providing climate control solutions for residential properties.
- 6TOSOT Direct2.9 / 5 · Poor0 reviews
TOSOT Direct sells energy-efficient HVAC systems including mini-split air conditioners, central AC units, and heat pumps, manufactured by GREE Electric Appliances.
- 7Vestklima2.9 / 5 · Poor0 reviews
Vestklima ApS provides cooling and heat pump service along the west coast of Denmark, from Rømø to Thyborøn.
- 8Four Seasons Heating and Cooling2.9 / 5 · Poor0 reviews
A Chicago-based HVAC contractor providing heating, cooling, electrical, and plumbing services.
- 9Cielo WiGle2.8 / 5 · Poor0 reviews
Cielo WiGle manufactures smart thermostats designed for mini-split and central HVAC systems, enabling users to control home climate with energy-efficient, DIY-installable devices.
- 10Trotec2.8 / 5 · Poor0 reviews
Trotec provides air and water conditioning solutions for industry, leisure, and building sectors, offering products such as dehumidifiers, heaters, fans, and air purification syste…
How this ranking works
Every company on TrustRating gets a TrustScore that combines real customer reviews with assessments from multiple independent AI models covering trust, regulation, support and reputation signals. Rankings update automatically as new reviews and scans come in — companies can't pay to change their position. Read the full methodology →