Top 11 Energy-efficient heating startups in USA
Dec 09, 2025
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29
1
Funding: $266.6M
BlocPower is offering smart, all electric heating, cooling, and hot water systems to building owners for no money down.
BlocPower is offering smart, all electric heating, cooling, and hot water systems to building owners for no money down.
2
Funding: $174.5M
Dandelion is an Alphabet spinout that develops geothermal heating, air-conditioning and cooling systems
Dandelion is an Alphabet spinout that develops geothermal heating, air-conditioning and cooling systems
3
Funding: $162.3M
Rondo Energy invented new, surprisingly simple solution to the critical need for low cost, zero-carbon heat.
Rondo Energy invented new, surprisingly simple solution to the critical need for low cost, zero-carbon heat.
4
Funding: $97.5M
Sealed covers the upfront costs to install energy-saving upgrades like insulation, smart tech, and HVAC to make your house feel like new.
Sealed covers the upfront costs to install energy-saving upgrades like insulation, smart tech, and HVAC to make your house feel like new.
5
Funding: $62M
Quilt produces ductless, dual-zone home heat pumps controlled by artificial intelligence. Quilt's indoor and outdoor units, Dial and mobile app work together to create intelligent home climate control solution. To compete with established players in the heat pump market, the company has focused on software and design. One example is the over-the-air update it has implemented for existing heat pumps - the new firmware improved unit performance by over 20%. Ductless systems ensure a consistent temperature in every room. Quilt is even more efficient thanks to the Auto-Away feature, which uses smart sensors to save energy when rooms are unoccupied. Installation is simple and quick, like other ductless systems and most modern systems are currently in production. The company is building a network of certified installation partners.
Quilt produces ductless, dual-zone home heat pumps controlled by artificial intelligence. Quilt's indoor and outdoor units, Dial and mobile app work together to create intelligent home climate control solution. To compete with established players in the heat pump market, the company has focused on software and design. One example is the over-the-air update it has implemented for existing heat pumps - the new firmware improved unit performance by over 20%. Ductless systems ensure a consistent temperature in every room. Quilt is even more efficient thanks to the Auto-Away feature, which uses smart sensors to save energy when rooms are unoccupied. Installation is simple and quick, like other ductless systems and most modern systems are currently in production. The company is building a network of certified installation partners.
6
Funding: $35.9M
Radiator Labs invented Cozy - a wireless, low-cost and easily installed retrofit that drops on top of steam heat radiators, providing a solution to the chronic problem of uneven heating in apartment buildings. Installation throughout a building can save up to 45 percent in heating costs and reduce GHG emissions by an average of 25 percent.
Radiator Labs invented Cozy - a wireless, low-cost and easily installed retrofit that drops on top of steam heat radiators, providing a solution to the chronic problem of uneven heating in apartment buildings. Installation throughout a building can save up to 45 percent in heating costs and reduce GHG emissions by an average of 25 percent.
7
Funding: $20.5M
Bedrock Energy develops drilling technology and advanced subsurface simulation software to enable geothermal heating and cooling.
Bedrock Energy develops drilling technology and advanced subsurface simulation software to enable geothermal heating and cooling.
8
Funding: $12.8M
Harvest Thermal develops a control system for home use that integrates heating, hot water, and cooling with thermal storage.
Harvest Thermal develops a control system for home use that integrates heating, hot water, and cooling with thermal storage.
9
Funding: $11.1M
Cala Systems manufactures the world's first intelligent heat pump water heater.
Cala Systems manufactures the world's first intelligent heat pump water heater.
10
Funding: $5M
Dig Energy produces purpose-built drilling technology to create highly efficient geothermal heating and cooling systems.
Dig Energy produces purpose-built drilling technology to create highly efficient geothermal heating and cooling systems.
11
Funding: $4.5M
Shifted Energy enable electric water heaters to consume excess renewable energy and provide grid services.
Shifted Energy enable electric water heaters to consume excess renewable energy and provide grid services.
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