As seen in Fast Company · Jan 2026

Heating and cooling for the people who need it most.

Envr Air installs heating and cooling solutions across entire buildings — quickly, affordably, and without disrupting residents. No construction. No electrical upgrades.

⚡ 12 days · 277 units
Affordable housing building with window heat pumps installed
Carroll Tower · Providence, RI
Largest window heat pump install in the US — completed in 12 days.
Powered by Gradient
~85%
Less expensive than traditional heat pump conversions
~60%
Heating energy reduction vs. electric baseboard heating
12days
To convert a 194-unit building — vs. 6–12 months conventional
−13°F
Cold-climate rated for true New England winters
How it works

Whole buildings.
In days, not months.

A logistics model 16 years in the making — applied to the most urgent gap in the clean energy transition.

01

Affordable at scale.

We install through existing windows and plug into standard outlets — quick, simple, and tenant-friendly. Most installs take about 30 minutes, with residents staying right where they are throughout.

~85% less than traditional heat pump conversions
02

Entire buildings in days, not months.

We've converted 194-unit high-rises in 12 days. That's a logistics advantage built over 16 years — warehousing, scheduling systems, and crews capable of 200+ daily installations.

200+ installations per day
03

Year-round comfort for residents.

One Gradient window heat pump replaces both the heating system and the window AC. Residents get individual temperature control — often for the first time. If a unit ever fails, it's swapped out in hours.

1 unit replaces heat + AC, fully resident-controlled
In partnership with Gradient
Gradient Window Heat Pump
Now available for homeowners

A heat pump that fits in your window.

The Gradient All-Weather window heat pump heats and cools your home year-round — without the construction, ductwork, or electrical upgrades of a traditional system. Plugs into a standard outlet. Installs in minutes.

Heats to −13°F — true cold-climate performance
Plugs into a standard 120V outlet
Installs in under an hour — no construction
Replaces both your heating and your window AC
Envr Air is the official sales, installation and servicing partner for Gradient window heat pumps.
Trusted partners

Working with the institutions driving real decarbonization.

From housing authorities to clean energy funders, we partner with organizations leading the transition across the Mid-Atlantic and Northeast.

Gradient
Providence Housing Authority
MCEC
Brighton Housing Authority
Midea

Equipment partners: Gradient & Midea

Let's build something

Work with us.

We work with building owners, operators, and program administrators across the Mid-Atlantic and Northeast — from housing authorities and universities to energy programs and community organizations. If you're exploring any kind of heating or cooling solution, we'd like to talk.