Gradient CCHP11

• CEER (class median 15.0)16.8, no ties
• Yearly cost vs. class median ($90)$15 less
• Width 25.3" (class median 19.8")narrower than 19%
• Weight 140 lb (class median 58 lb)lighter than 0%
• Rank among 3 similar designs that heat#1

Compared with the other ENERGY STAR certified 10,000 BTU window units. Yearly cost at 750 hours and 18.0¢/kWh.

How many square feet does the Gradient CCHP11 cool?

At 9,300 BTU/h it suits a room of about 300 to 400 sq ft with normal sun and two people, following the ENERGY STAR sizing guide. In a heavily shaded room that stretches to about 330-440 sq ft; in a very sunny one it shrinks to 270-360 sq ft. A kitchen needs 4,000 BTU more.

How many watts and amps does the Gradient CCHP11 use?

About 554 watts at full power (9,300 BTU/h divided by its CEER of 16.8), which is 4.6 amps at 120 V. That is 113 W less than the typical unit in its class (667 W), or $15 a year cheaper to run at 18.0¢/kWh. Its inverter compressor slows down instead of cycling, so real use is usually lower. Its CEER beats 93% of the 28 units in the class.

Can the Gradient CCHP11 run on a standard outlet?

Yes. It runs on 115 V and draws about 4.6 A, well inside a standard 15 A outlet, but do not share the circuit with a space heater, microwave or other big load. Every certified unit in this class is 115 V.

What are the dimensions of the Gradient CCHP11, and will it fit my window?

25.3" W × 24" H × 37.3" D, 140 lb. It is narrower than 19% of its 27 competitors and lighter than 0% of them. The window closes into the U-shaped slot, so measure the opening height as well as the width: you need at least the unit's 25.3" width between the frame sides.

Is the Gradient CCHP11 U-shaped design an advantage?

Mostly yes. The sash closes into the unit, so the window stays sealed and daylight comes in, and the compressor is outside the glass, which cuts noise indoors. The trade-off is a window that must slide up and down, and a few extra steps to fit the foam seals.

How does the Gradient CCHP11 heat?

It reverses its refrigerant cycle to work as a heat pump, which makes it one of only 6 certified units in its class that heat. Heating output is not part of the ENERGY STAR data, so ask the maker for its heating capacity and lowest outdoor temperature before relying on it in winter.

Is the Gradient CCHP11 worth buying to replace an old air conditioner?

An old unit of the same size at 9 CEER would cost about $140 a year to run at 750 hours and 18.0¢/kWh; this one costs about $75, so it saves roughly $65 a year.