Better, inside and out.

Planet-friendly heating and cooling that's always just right. Preorder now for limited-time pricing.

$1,999 $99 deposit
Preorder

Better, inside and out.

Planet-friendly heating and cooling that's always just right. Preorder now for limited-time pricing.

$1,999 $99 deposit
Preorder

Gradient is flexible and fits a wide range of window options.

Gradient is flexible and fits a wide range of window options.

They rattle, we purr.

Gradient’s modular design places the power and noise outside your window, leaving you with heating and cooling that keeps the calm inside.

Details and Specs

They rattle, we purr.

Gradient’s modular design places the power and noise outside your window, giving you a cool that keeps the calm.

Comfort is in your control.

Our commercial grade heat pump technology is more efficient than traditional window AC units, which saves on energy consumption and monthly bills.

Energy efficient.

We're currently awaiting our official efficiency rating. But we estimate a greenhouse gas emissions reduction of up to 95% when the Gradient is used to cool and heat, depending on your source of electricity. That’s like choosing to walk instead of drive up to 15 miles daily – just by switching to Gradient.i* Assumes that an entire household in a moderate climate powered with 2 tons of HVAC capacity (24,000 BTU/hr) replaces their heating and cooling system with Gradient powered by decarbonized electricity; that household uses 2.65 kgCO2eq/day without Gradient and 0.14 kgCO2eq/day with Gradient. This absolute reduction of 2.51 kgCO2eq/day per household represents a 94.7% reduction in greenhouse gas emissions. Vehicle is a Toyota Prius that creates 104 g/km of carbon CO2 pollution per MacKay.

Our end goal is to achieve a 100% carbon reduction; we see our current model as a very important and very big first step toward that goal.

Energy Guide

Energy efficient.

We're currently awaiting our official efficiency rating. But we estimate a greenhouse gas emissions reduction of up to 95% when the Gradient is used to cool and heat, depending on your source of electricity. That’s like choosing to walk instead of drive up to 15 miles daily – just by switching to Gradient.i* Assumes that an entire household in a moderate climate powered with 2 tons of HVAC capacity (24,000 BTU/hr) replaces their heating and cooling system with Gradient powered by decarbonized electricity; that household uses 2.65 kgCO2eq/day without Gradient and 0.14 kgCO2eq/day with Gradient. This absolute reduction of 2.51 kgCO2eq/day per household represents a 94.7% reduction in greenhouse gas emissions. Vehicle is a Toyota Prius that creates 104 g/km of carbon CO2 pollution per MacKay.

Our end goal is to achieve a 100% carbon reduction; we see our current model as a very important and very big first step toward that goal.

Four easy steps to ‘ahhhh.’

Our installation bracket enables you to install Gradient safely and securely without fear of dropping or breaking it — no tools required. Just plug the power cord into the standard 120V outlet and you're good to go.

Installation Guide

PREORDER FOR $99

Advanced heat pump technology in a beautiful, easy-to-install package.

  • 15-minute DIY install
  • Commercial-grade power
  • Energy efficient
  • Planet-friendlier refrigerant
  • Quieter
  • Doesn't block your view
  • Open and close your window
  • Standard 120V outlet
  • Washable filter
  • No need for drilling or permits
How it works

No system looks or works like Gradient.

HVAC systems are designed to move heat using a refrigerant. Because they work under high pressure, mini splits require professional, expensive installation. As for window ACs...well, that high pressure system is the reason they're designed as that big, bulky box that takes over your window.

Engineered to be svelte.

Our heat pump technology uses
water to distribute heat inside while keeping the high pressure refrigerant outside, resulting in less noise and less bulk.

Designed for the home.

By adding a secondary coolant loop at a much lower pressure, we’ve built a modular design that you can set up, install and control yourself.

Commercial grade power.

Inside are professional-level components like variable speed fans, large heat exchangers and reversible operations that keep you cool or warm all year-round.

Our heat pump technology uses
water to distribute heat inside while keeping the high pressure refrigerant outside, resulting in less noise and less bulk.

By adding a secondary coolant loop at a much lower pressure, we’ve built a modular design that you can set up, install and control yourself.

Inside are professional-level components like variable speed fans, large heat exchangers and reversible operations that keep you cool or warm all year-round.

The reviews are in.

See what people and the press have to say about Gradient.
"Gradient has replaced the conventional home window air conditioner with a space-saving designed solution that keeps homes cool with advanced heat pump technology and a climate-friendly refrigerant."
Sandra Rossi, Climate Control News

In the details.

Physical specifications

Dimensions
Indoor unit

24 in

24 in

8 in

Outdoor unit

24 in

24 in

15 in

Weight
Indoor unit

50 lbs

Outdoor unit

90 lbs

Noise

High/Medium/Low: 58/54/48 dB

Window compatibility

For single hung or double hung windows only. Check if it fits.

Volts

120V

Power cord length

6 foot power cord

Product details

Features

Mobile app control

Scheduling

1-year limited parts & labor warranty

Modes

Cooling

Fan-Only

Heating

Boost-mode

Cooling power

8,600 BTU/hr

Heating power

8000 BTU/hr

Contact us for more details

Energy efficiency

10.8 CEER

Filter type

Washable Mesh