How many square feet does the Friedrich KCVS12B30A cool?

At 12,700 BTU/h it suits a room of about 450 to 550 sq ft with normal sun and two people, following the ENERGY STAR sizing guide. In a heavily shaded room that stretches to about 495-605 sq ft; in a very sunny one it shrinks to 405-495 sq ft. A kitchen needs 4,000 BTU more.

How many watts and amps does the Friedrich KCVS12B30A use?

About 847 watts at full power (12,700 BTU/h divided by its CEER of 15.0), which is 3.7 amps at 230 V. That is 47 W more than the typical unit in its class (800 W), or $6 a year dearer to run at 18.0¢/kWh. Its inverter compressor slows down instead of cycling, so real use is usually lower. Its CEER beats 18% of the 34 units in the class.

What outlet does the Friedrich KCVS12B30A need?

It is a 230 V unit that draws 3.7 A, so it needs its own 230 V circuit with a matching plug (typically NEMA 6-15 or 6-20). If the room has only ordinary 115 V outlets, an electrician has to add one. Only 12% of the 34 certified units in this class are 230 V.

What are the dimensions of the Friedrich KCVS12B30A, and will it fit my window?

25.9" W × 15.9" H × 29" D, 110 lb. It is narrower than 3% of its 33 competitors and lighter than 6% of them. The window must be wider than 25.9"; the side panels fill the remaining gap.

Can the Friedrich KCVS12B30A also heat the room?

No, it only cools. If you also need heat, 5 certified units in this class can do both; see the list of air conditioners with heat.

Is the Friedrich KCVS12B30A worth buying to replace an old air conditioner?

An old unit of the same size at 9 CEER would cost about $191 a year to run at 750 hours and 18.0¢/kWh; this one costs about $115, so it saves roughly $76 a year.

12,700 BTU window air conditioner

Friedrich KCVS12B30A

Below average efficiency for its size: a CEER of 15.0 ranks #18 of 34 12,000 BTU window air conditioners.

It cools a room of about 450-550 sq ft, draws about 847 watts and costs about $115 a year to run at typical U.S. use and prices.

CEER: 15.0 Combined efficiency, higher is better
Below average · beats 38%
Cooling: 12,700 BTU/hFor about 450-550 sq ft
Energy use: 635 kWh/yr38% less than the federal minimum
Unit size: 25.9" wide 15.9" high, 29" deep, 110 lb

A good fit if…

You want a certified 12,700 BTU window air conditioner at a typical efficiency level.

Think twice if…

Running cost matters most - its CEER is below average for 12,000 BTU window air conditioners.
You only have ordinary outlets - it needs a 230 V circuit and plug.
You plan to install it alone - at 110 lb it is a two-person job.
You also need heat - it cools only.

Calculate my running cost Check the size for my room

Details

Specifications12,700 BTU, 230 V

General
Brand	Friedrich
Model number	KCVS12B30A
Type	Window
Design	Standard box
Heating	No, cooling only
Compressor	Variable speed (inverter)
Voltage	230 V (needs a 230 V outlet)
Refrigerant	R-32 (GWP 675)
Support bracket included	Yes
On the market since	March 12, 2025
Last certified	March 13, 2025
Performance
Cooling capacity	12,700 BTU/h
CEERCombined energy efficiency ratio, includes standby power	15.0
Yearly energy useENERGY STAR test: 750 hours	635 kWh
Better than federal minimum	38% less energy
ENERGY STAR Most Efficient	No
Size
Width × height × depth	25.9" W × 15.9" H × 29" D
Weight	110 lb

How it compares with 33 other 12,000 BTU window units#18 of 34

CEER (class median 15.0)15.0, tied with 13 others
Yearly cost vs. class median ($108)$6 more
Width 25.9" (class median 20.3")narrower than 3%
Weight 110 lb (class median 59 lb)lighter than 6%
Rank among 13 similar designs#8

Compared with the other ENERGY STAR certified 12,000 BTU window units. Yearly cost at 750 hours and 18.0¢/kWh.

Questions6

How many square feet does the Friedrich KCVS12B30A cool?: At 12,700 BTU/h it suits a room of about 450 to 550 sq ft with normal sun and two people, following the ENERGY STAR sizing guide. In a heavily shaded room that stretches to about 495-605 sq ft; in a very sunny one it shrinks to 405-495 sq ft. A kitchen needs 4,000 BTU more.
How many watts and amps does the Friedrich KCVS12B30A use?: About 847 watts at full power (12,700 BTU/h divided by its CEER of 15.0), which is 3.7 amps at 230 V. That is 47 W more than the typical unit in its class (800 W), or $6 a year dearer to run at 18.0¢/kWh. Its inverter compressor slows down instead of cycling, so real use is usually lower. Its CEER beats 18% of the 34 units in the class.
What outlet does the Friedrich KCVS12B30A need?: It is a 230 V unit that draws 3.7 A, so it needs its own 230 V circuit with a matching plug (typically NEMA 6-15 or 6-20). If the room has only ordinary 115 V outlets, an electrician has to add one. Only 12% of the 34 certified units in this class are 230 V.
What are the dimensions of the Friedrich KCVS12B30A, and will it fit my window?: 25.9" W × 15.9" H × 29" D, 110 lb. It is narrower than 3% of its 33 competitors and lighter than 6% of them. The window must be wider than 25.9"; the side panels fill the remaining gap.
Can the Friedrich KCVS12B30A also heat the room?: No, it only cools. If you also need heat, 5 certified units in this class can do both; see the list of air conditioners with heat.
Is the Friedrich KCVS12B30A worth buying to replace an old air conditioner?: An old unit of the same size at 9 CEER would cost about $191 a year to run at 750 hours and 18.0¢/kWh; this one costs about $115, so it saves roughly $76 a year.

Running cost calculator

Pre-filled with this model. Pick your state and how many hours you run it, or see the yearly cost in every state.

1. The air conditioner Friedrich KCVS12B30A

Cooling capacity BTU/hCEER efficiency, higher is better

2. How you use it

StateElectricity ¢ per kWhHours a day at full powerDays a year from your state's climate

Per year: $179
Per month of use: $33
Per day: $1.08
Per hour: 13.5¢
Power draw: 847 W

Electricity used: 1,118 kWh a yearAn old 9 CEER unit of the same size would cost $298

Power draw is capacity divided by CEER, which already includes standby power. Inverter units often run below full power, so real use can be lower. Electricity prices: U.S. EIA residential averages (12 months to July 2026). Days a year start from your state's cooling degree days (NOAA 1991-2020 normals).

Closest alternatives

Units with a similar CEER in the same class, and what sets each one apart from the Friedrich KCVS12B30A.

Model	CEER	Compared with this one
Whirlpool WHAW-121IN	15.0	same CEER, 1.7" narrower, 45 lb lighter, U-shaped, 115 V
LG LW1222IVSM	15.0	same CEER, 2.3" narrower, 25 lb lighter, U-shaped, 115 V
LG LW1224IVSM	15.0	same CEER, 2.3" narrower, 25 lb lighter, 115 V
TCL H12W4MW	15.0	same CEER, 2.9" narrower, 51 lb lighter, 115 V
TCL T12WQ2S	15.0	same CEER, 5.2" narrower, 51 lb lighter, U-shaped, 115 V

See all 34 12,000 BTU window air conditioners, ranked

Source: ENERGY STAR Certified Room Air Conditioners (U.S. EPA), certification of March 13, 2025. How we use the data.