6,000 BTU is the step between the entry-level 5,000 BTU window unit and the 8,000 BTU class, and it is the size most retailers put on the shelf as a bedroom air conditioner. In an average room it cools up to about 300 sq ft. Its best fit is 250 to 300 sq ft: below 250, a 5,000 BTU unit already covers the load and costs a little less to run.
Conditions move that number. A shaded room with good insulation stretches to about 370 sq ft; a sunny, poorly insulated one tops out around 230 sq ft; a 10 ft ceiling cuts it to 240. The common case where 6,000 beats 5,000 is a 12 by 14 or 14 by 16 bedroom with a west window, where afternoon sun pushes the load past 5,000.
As heat, 6,000 BTU covers about 150 sq ft in a moderate climate, 200 in a hot one and 100 in a cold one. Few heaters are sold at exactly this rating. Most people who search it own a 6,000 BTU window unit with a heat strip, and the heat strip is usually weaker than the cooling rating, so read the heating BTU on the label before counting on it in January.
Converted, 6,000 BTU/hr is 1.76 kW, 1,758 W or half a ton of cooling. A window unit this size draws about 545 W, roughly 4.7 A at 115 V, so it runs on any normal outlet.
How many square feet a 6,000 BTU air conditioner cools
Largest room the unit keeps up with, rounded down to the nearest 10 sq ft. Two occupants, 8 ft ceiling and moderate climate unless the row says otherwise.
| Room | Cools up to |
|---|---|
| Shaded, good insulation | 370 sq ft |
| Average room (baseline) | 300 sq ft |
| Very sunny, poor insulation | 230 sq ft |
| Hot climate, very sunny | 240 sq ft |
| 10 ft ceiling | 240 sq ft |
| 4 people instead of 2 | 240 sq ft |
| Kitchen in the space | 100 sq ft |
How many square feet 6,000 BTU of heat covers
By climate and insulation. For a gas heater, use its output rating (input × efficiency).
| Climate | Poor insulation | Average insulation | Good insulation |
|---|---|---|---|
| hot | 160 sq ft | 200 sq ft | 230 sq ft |
| moderate | 120 sq ft | 150 sq ft | 170 sq ft |
| cold | 90 sq ft | 100 sq ft | 120 sq ft |
6,000 BTU in kW, watts and tons
| Kilowatts | 1.76 kW |
| Watts | 1,758 W |
| Tons of cooling | 0.50 tons |
| Power an AC this size draws (EER 11) | about 545 W, 4.7 A at 115 V |
| Power an electric heater needs for this output | 1,758 W, 7.3 A at 240 V |
kW and watts here are heat output, the number on the box. An air conditioner moves that much heat while drawing far less electricity; an electric heater draws exactly as much as it puts out.
6,000 BTU questions
How many square feet does a 6,000 BTU air conditioner cool?
Up to about 300 sq ft in an average room. The best fit is 250 to 300 sq ft; a shaded, well insulated room can go to about 370, and a sunny, poorly insulated one only about 230.
Is 6,000 BTU enough for a 12 × 15 bedroom?
Yes. A 12 × 15 room is 180 sq ft and needs about 3,600 BTU/hr in average conditions and about 4,600 when it is sunny and poorly insulated. A 5,000 BTU unit would also work; 6,000 gives headroom for a hot upstairs room.
How many amps does a 6,000 BTU AC use?
About 4.5 to 5 A at 115 V, roughly 545 W for a unit with an EER of 11. It runs on a normal household outlet.