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Old buildings,
new tech. We’re your decarbonization partner.

Kelvin’s smart radiator covers, heat pumps, and thermal batteries save money, reduce carbon emissions, and enable pinpoint temperature control for apartments in legacy buildings.

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30,000 +

Cozy's sold

25.5 %

Average savings on heating costs

80 %

Electrification for 10% of the cost

Why you need Kelvin solutions

  • Increased profitability for building owners
  • Simplified temperature control for residents
  • Improved safety for children and pets
  • Compliance with local sustainability laws
  • May be purchased for no upfront cost with instant payback

Seamless heating & cooling solutions

Kelvin’s thermostatic radiator enclosures (Cozys), heat pumps, and thermal batteries are the easiest and most cost-effective way to improve heating efficiency in legacy buildings and work toward the larger goals of sustainability and decarbonization. Our quick and stress-free installations enable legacy building owners to save money and energy while also providing tenants with room level temperature control all year long.

Products and solutions The need for intelligent HVAC

Want to know how much money and energy your building could save?

Calculate energy bill savings

Free Energy Savings Analysis

Please fill out the information below the best that you can. We will walk you through how to enjoy 25-40% energy savings with no money down.

"*" indicates required fields

Full Name*
Building Address
Type of Radiators
Drop files here or
Max. file size: 300 MB.
    24 Months of heating fuel data including all accounts that feed the boiler (natural gas, heating fuel oil, etc.)
    This field is for validation purposes and should be left unchanged.
    Photo of an apartment building radiator
    75%

    Of all the buildings in
    New York City are heated using steam radiators.

    A whole new world for radiator-heated buildings

    While radiators are robust, and have been in use for more than a century, modern upgrades like double pane windows have made this technology vastly inefficient, leading to overheated buildings where occupants open up the windows to cool off. Our foundational product, the Cozy, puts an end to this problem. Our insulated radiator cover distributes heat with maximum efficiency to prevent waste and heating imbalances.

    Meet the Cozy

    Real buildings, real results

    View all success stories

    2 Charlton Street

    31k+
    30%
    Learn More

    LeFrak 295 Clinton Ave.

    5k+
    14%
    Learn More

    Clinton Hill Co-ops

    1,580
    42.79%
    Learn More
    Photo of a residential loft
    Image BorderPhoto of the Brooklyn Bridge in New York City

    Shaping the future of legacy buildings in the energy transition

    Through a variety of hybrid electrification methods, Kelvin is on a mission to support legacy buildings in transitioning to a decarbonized future. The team is working on a number of intelligent HVAC solutions, including thermal batteries and other groundbreaking technology.

    Our mission

    Recent News

    View all news
    [Bloomberg] Kelvin one of 11 Startups Leading the $1.8 Trillion Climate Tech Revolution
    Media April 2024
    [Bloomberg] Kelvin one of 11 Startups Leading the $1.8 Trillion Climate Tech Revolution Learn More

    Are you ready to save money and energy?

    Find out if your property is eligible and learn more about the available utility rebates and state incentives.

    Calculate savings

    Free Energy Savings Analysis

    Please fill out the information below the best that you can. We will walk you through how to enjoy 25-40% energy savings with no money down.

    "*" indicates required fields

    Full Name*
    Building Address
    Type of Radiators
    Drop files here or
    Max. file size: 300 MB.
      24 Months of heating fuel data including all accounts that feed the boiler (natural gas, heating fuel oil, etc.)
      This field is for validation purposes and should be left unchanged.