U.S. startup Transaera announced it will test rooftop heat pump technology in a multifamily residential building in Washington D.C., United States.

The project is backed by a $125,000 grant from the National Deployment Grant Fund of The Clean Fight, a New York-based nonprofit that supports the early deployment of proven clean energy technologies.

“Building owners deciding how to electrify need operating cost reduction and want to see performance data from a building like theirs before they commit,” said Sorin Grama, CEO and co-founder of Transaera. “This project lets us prove, with independent data, that a more efficient system works as well to properly condition a whole apartment building as it does in an Amazon warehouse. Working with the largest apartment owner in the country means those results will go directly to the people making these decisions.”

The company describes its technology as a dedicated outdoor air system (DOAS), a type of heating, ventilation and air conditioning (HVAC) system that conditions incoming outdoor air for ventilation separately from a building’s primary heating and cooling equipment.

The all-electric system combines cooling, heating and dehumidification in a single platform. Operating as a heat pump, it eliminates the need for gas-fired reheating while managing both sensible and latent cooling loads in commercial buildings.

According to Transaera, a key feature of the technology is its approach to humidity control. Unlike conventional HVAC systems, which typically cool air below its dew point to remove moisture through condensation before reheating it, the DOAS uses solid desiccant materials based on metal–organic frameworks (MOFs) to extract moisture from incoming air before cooling.

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