How many BTU do I need per square foot?
2. Find the correct cooling capacity for your room size
|Area To Be Cooled (square feet)||Capacity Needed (BTUs per hour)|
|300 up to 350||8,000|
|350 up to 400||9,000|
|400 up to 450||10,000|
|450 up to 550||12,000|
BTU Sizing Chart for Mini Split Systems
|Area To Be Cooled||Capacity Needed (BTUs Per Hour)|
|300 to 350 square feet||8,000 BTUs|
|350 to 400 square feet||9,000 BTUs|
|400 to 450 square feet||10,000 BTUs|
|450 to 550 square feet||12,000 BTUs|
- One BTU is the amount of heat energy required to raise one pound of water by 1ºF. Water weighs 8.33 pounds per gallon so we can calculate that one gallon of water requires 8.33 BTU to raise the temperature 1ºF. 1 Pound of Gas (1 PSI) = 28″ Water Column (w.c.) 1 Pound of Gas (1 PSI) = 16 Ounces (oz.)
- Furnace Output and Air Conditioner size for a Bungalow
Bungalow Area [square feet] * Furnace Output [BTU/hr] 1200 to 1500 sq ft 50,000 BTU/hr 55,000 BTU/hr 1500 to 1800 sq ft 55,000 BTU/hr 60,000 BTU/hr 1800 to 2500 sq ft 65,000 BTU/hr 70,000 BTU/hr 2500 to 3500 sq ft 80,000 to 90,000 BTU/hr 90,000 to 100,000 BTU/hr
- Mini-splits are heating and cooling systems that allow you to control the temperatures in individual rooms or spaces. Mini-split systems have two main components -- an outdoor compressor/condenser and an indoor air-handling unit(s) (evaporator).
|Model||BTUs||Space it will Heat|
|Novus 30||14,000 – 20,000||400 – 700 square feet|
|Novus 33||15,000 – 22,000||500 – 700 square feet|
|Novus 36||17,000 – 25,000||600 – 900 square feet|
|Novus 42||19,500 – 27,500||700 – 1,100 square feet|
- BTU Sizing Chart for Mini Split Systems
Area To Be Cooled Capacity Needed (BTUs Per Hour) 300 to 350 square feet 8,000 BTUs 350 to 400 square feet 9,000 BTUs 400 to 450 square feet 10,000 BTUs 450 to 550 square feet 12,000 BTUs
- 1. Cooling Capacity
Area To Be Cooled (Sq. Ft.) Capacity Needed (BTUs Per Hour) 400 to 450 sq. ft. 10,000 BTUs 450 to 550 sq. ft. 12,000 BTUs 550 to 700 sq. ft. 14,000 BTUs 700 to 1,000 sq. ft. 18,000 BTUs
- Furnace and Air Conditioner size for a semi-detached 2-storey home
Semi-detached House square footage * Furnace Output [BTU/hr] Air Conditioner size [ton] up to 1500 sq ft 40,000 BTU/hr 1.5 ton 1500 to 1800 sq ft 50,000 BTU/hr up to 2 ton 1800 to 2200 sq ft 55,000 BTU/hr 2 ton 2200 to 3000 sq ft 60,000 BTU/hr 2.5 ton
Basics. A quick way to estimate the BTU needs of a 900-square foot space is to use the estimated capacities listed at the U.S. Environmental Protection Agency's Energy Star website. It states that a room with 700 to 1,000 square feet needs a furnace with a capacity of 18,000 BTUs.
- Basics. A quick way to estimate the BTU needs of a 900-square foot space is to use the estimated capacities listed at the U.S. Environmental Protection Agency's Energy Star website. It states that a room with 700 to 1,000 square feet needs a furnace with a capacity of 18,000 BTUs.
- Average BTU Ratings. A typical furnace is rated at 100,000 or 80,000 BTU per hour, but furnaces might be as small as 40,000 or as large as more than 200,000 BTU. A 90 percent high-efficiency rated at 60,000 BTU will deliver about 54,000 BTUs per hour of heat energy to your home.
- Understand here that the standard practice among HVAC contractors sizing air conditioners for new homes is to use a rule of thumb. It's often in the neighborhood of 1 ton of air conditioning capacity for each 600 square feet of conditioned floor area, usually abbreviated 600 sf/ton.
Updated: 24th September 2018