K
Kelvin
Energy · New York City, United States · Founded 2011
Smart energy solutions provider modernizing legacy radiator-heated buildings with precise temperature control and efficient heating systems MoreLess
Kelvin, formerly known as Radiator Labs, is a company that specializes in providing intelligent HVAC solutions for legacy buildings. The company's primary mission is to aid in the decarbonization of these older structures through various hybrid electrification methods. Their offerings include "The Cozy," an insulated radiator cover designed to distribute heat with maximum efficiency, which can reduce heating costs by up to 45%. Kelvin designs and installs comprehensive HVAC systems that are aimed at decarbonizing buildings and improving energy savings.
The company was founded in 2013 by Marshall Cox, a material science engineer, in New York City. Kelvin's business model is centered on helping property owners save money and energy. They offer their intelligent heating and cooling solutions with zero-cost installation options, making it more accessible for legacy buildings to transition to a more sustainable future. The company primarily serves owners of older residential and commercial buildings in major cities. By focusing on this market, Kelvin addresses the significant challenge of retrofitting existing building stock to meet modern energy efficiency standards. The company has successfully raised capital, including a $30 million Series A funding round, to expand its operations and further its goal of decarbonizing legacy buildings globally.
Keywords: HVAC solutions, legacy buildings, decarbonization, energy efficiency, radiator covers, building retrofitting, hybrid electrification, property technology, energy savings, cleantech
Company overview
Kelvin company information
The essential company record, classifications and operating signals in one place.
- Status
- Operational
- Founded
- 2011
- Headquarters
- New York City, United States
- Employees
- 59
- Open positions
- None listed
- Dealroom signal
- 65.9
Valuation & funding
Kelvin funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| CONVERTIBLEEquity / VC | Oct 2023 | $0 | — | Elemental Excelerator | — |
| SERIES A✓Equity / VC | May 2023 | $30M | $120M | 2150 · Partnership Fund for New York City · Hillspire | ↗ |
| GRANTOther financing | Jun 2020 | — | — | Leading Cities | — |
| SERIES A✓Equity / VC | Aug 2019 | $1.1M | $4.6M | Undisclosed | — |
| GRANTOther financing | Jan 2018 | $910K | — | US National Science Foundation · MIT CleanEnergyPrize | — |
| GRANT✓Other financing | Apr 2017 | US National Science Foundation | ↗ | ||
| DEBT✓Debt | Oct 2016 | Undisclosed | — | ||
| SEED✓Equity / VC | Mar 2016 | Undisclosed | — | ||
| SEED✓Equity / VC | Aug 2015 | Third Sphere | — | ||
| SEED✓Equity / VC | Mar 2015 | Third Sphere · MetaProp | — |
Financials
Workforce over time
Available workforce history. Financial fields without reported data are omitted.
| Year | Employees |
|---|---|
| 2026 | 60 |
| 2025 | 63 |
| 2024 | 58 |
| 2023 | 32 |
| 2022 | 9 |
| 2021 | 11 |
| 2020 | 11 |
Growth signals
Kelvin website traffic
Latest recorded traffic for Kelvin is 3.3K monthly website visits, up 13.8% over the last three months. Kelvin's team declined 6.3% over the past year.
Comparisons
Kelvin compared with similar companies
Dealroom’s weighted taxonomy model identifies the closest operating peers. Company identity and context stay open; selected comparison metrics preview what is available in the platform.
Talent graph
Kelvin's talent
Source: Dealroom Talent Intelligence.
Global footprint
Where Kelvin has talent and traffic
In the news
Latest news about Kelvin
Recent press, funding announcements, and product moves mentioning Kelvin — open to read from the original sources.
Market sentiment
What the market is saying about Kelvin
An AI-synthesized read of the highest-engagement posts about Kelvin on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
See Kelvin’s full profile on Dealroom
Request a free trial to see the complete deal history, financials, people graph and growth signals.
Takes under a minute. Already use Dealroom? Log in.