Kelvin, formerly Radiator Labs

Kelvin, formerly Radiator Labs

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Decarbonizing the world's legacy buildings The Kelvin Cozy is a smart, internet-connected, thermostatic cover for radiators.

We're a NYC hardware startup solving a 100-year-old problem: the lack of comfort and efficiency in steam heated buildings. Buildings outfitted with Cozys save up to 45% on heating costs, and residents with Cozy are able to control their heating temperatures for the first time in the history of steam heated buildings.

Photos from Kelvin, formerly Radiator Labs's post 06/10/2026

We are excited to welcome our new summer interns, Lilly, Hibah and Jessie!

Lilly Xu is a rising senior at Harvard University studying Environmental Science and Public Policy with a minor in Statistics. She serves as the President of the Harvard Undergraduate Real Estate Investment Group. Prior to this role, she was the prior President of the Harvard Undergraduate Clean Energy Group, overseeing consulting projects within the climate and energy sphere. Her academic interests include land use and energy efficiency, and she is a recipient of the Ivory Fellowship.

Hibah Zeinab is currently a junior in Public Accounting and Business Management at Brooklyn College, joining Kelvin as a Sales Operations and CRM intern. She is the president of Koppelman Toastmasters and as a first generation college student, has been selected as a BASTA fellow for the BASTA x Bloomberg Mentorship program. She is passionate about the intersection of strategy, client relations, and sales, and also loves Formula 1 and baking!

Coleene Jessie Elias is a finance professional at Cornell University and is coming in as a Business Development Intern at Kelvin. Her focus is in leveraging the UN Sustainable Development Goals, decarbonization, and fintech to drive social equity. She was awarded the 2025 Top 100 Global Innovator award by the University of Delaware for leadership roles at a virtual enterprise and the Girls National Policy Network, and has also served as a Lead Researcher for government and behavioral initiatives.

Congratulations to all three of you for landing these internships and we are excited to work with you this summer!

Photos from Kelvin, formerly Radiator Labs's post 06/01/2026

Check out these heat pumps underway for one of our pilot Adaptive Electrification projects! Efficient cooling just in time for the hot summer weather 😎

Photos from Kelvin, formerly Radiator Labs's post 04/28/2026

On Wednesday, the Kelvin team headed to Midtown for the Cooperator Expo! We loved connecting with so many people face to face, showing off our new product, the Cozy Core, and keeping people well caffeinated for the event 😉

Thank you to everyone who stopped by the booth - we're excited to keep those conversations going!

Photos from Kelvin, formerly Radiator Labs's post 04/06/2026

Think your radiator shape is too unconventional for a Cozy retrofit? Think again!

Our Cozy Customs are called custom for a reason. We manufacture Cozy Customs based on measurements we take at your building so that the covers can fit perfectly. Want to see what that can look like? Check out these fun Cozys we installed in March 👀

Everyone deserves comfortable heating, and we’re here to make it happen.

02/27/2025

Kelvin has been selected as a Top 10 finalist for the Global ESG Awards 2025 – EcoBalance category! This recognition highlights our commitment to building decarbonization and energy efficiency.

At Kelvin, we’re dedicated to transforming how legacy buildings reduce emissions and improve energy efficiency. Being recognized in the EcoBalance category reinforces the impact of our work in tackling one of the biggest decarbonization challenges in cities today.

We’re honored to be listed alongside companies driving sustainability forward. A big thank you to the Global ESG Awards and their partners for recognizing the importance of this work!

02/27/2025

Join Garrett Modeste and Matthew Isaacs at the Cooperator Events New York Expo Information Hub at 11:30 AM, where they’ll present practical strategies for radiator-heated buildings to achieve energy compliance. If you’re attending, stop by and say hello!

➡️ March 4th
➡️ New York Hilton Midtown, Floor 2
➡️ Register for free: coopexpo.com

02/18/2025

We are happy to share that Kelvin has been selected as a Top 25 finalist for the 2025 Ivory Prize. We’re proud to be recognized for our efforts in driving innovation to make housing more affordable and accessible. Congratulations to all the finalists. We are excited to see what’s ahead!

View the Top 25 Ivory Prize Finalists here: https://buff.ly/41jzBTA

02/11/2025

The Green Proving Ground program has helped scale climate solutions for over a decade, testing emerging technologies in federally owned buildings before bringing them to market. Now, it’s at risk of being cut.

Our CEO, Marshall Cox, spoke with Fast Company about why programs like this are essential for decarbonizing buildings, reducing emissions, and lowering costs.

Read the full article: https://buff.ly/3EGCtRy

[Photo: Drew Angerer/Getty Images, FrankRamspott/iStock/Getty Images Plus]

01/22/2025

Kelvin’s CEO, Marshall Cox, shares his insights on the critical role of retrofitting legacy buildings to meet modern energy and emissions standards. Read his perspective on how innovative solutions like Kelvin’s are driving change and helping buildings adapt to the challenges of Local Law 97 and beyond.

Click here to learn more: https://buff.ly/3CmotMe

01/22/2025

Kelvin earned a spot on the 2025 Global Cleantech 100, highlighting our role as one of the world’s most innovative companies addressing critical environmental challenges. This recognition reflects our dedication to decarbonizing legacy buildings and advancing energy-efficient technologies.

Check out the full list and learn more about the innovators in sustainablility: https://buff.ly/4hlSLxo

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Website

Address


Brooklyn Navy Yard, 63 Flushing Avenue, Building 303, Suite 702
New York, NY
11205

Opening Hours

Monday 9am - 6pm
Tuesday 9am - 6pm
Wednesday 9am - 6pm
Thursday 9am - 6pm
Friday 9am - 6pm