If your btu requirement is between sizes simply go with the bigger unit.
How many ton ac unit per sq ft.
But your hvac dealer only has air conditioners that handle 24 000 or 30 000 btus.
In general you should have approximately 1 ton of ac capacity to cool 600 sq ft.
An air conditioner s cooling capacity is expressed in btuh british thermal units per hour or tons often referred to as tonnage.
Air conditioners are sized by the number of btus they put out.
1 500 x 30 45 000.
The manufacturers do not list the air conditioner size on the unit.
Multiply this by 12 000 btus and you ll get 60 000 btus.
This estimate is most accurate in new construction or newer homes that have proper insulation.
One ton of cooling capacity is equal to 12 000 btuh.
Instead of subtracting 1 0 instead subtract zero to get the appropriate ac size for hot and arid climates.
Or more the best air conditioning unit will be a 5 0 ton.
There are 12 000 btu s per ton.
Residential central air conditioners come in a range of sizes from 1 5 ton to 5 ton models.
So for instance a 1 500 square foot home would look something like this.
If you have a one ton ac unit it means it has the ability to cool 12 000 btus an hour.
Both offer a measurement of an air conditioner s cooling ability over an hour s time.
45 000 12 000 3 75.
Btus stand for british thermal units and refer to the amount of energy your air conditioner is using per hour.
Choose the 30 000 btu unit to make sure your comfort needs are covered.
To figure out what size air conditioner you require you first need to determine the amount of btus you require.
Your air conditioner will need to be able to remove this much heat from your home per hour to keep a stable temperature.
For example the manual j calculation may say you need 25 000 btus for cooling.
For example model gsx140241k is a 2 ton unit.
The number 24 in the model number indicates the unit is 24 000 btu s divided by 12 000 btu s per ton equals 2 tons.
Having a little extra power isn t bad.
This is done by calculating your square footage.
This is for an average american home however and will be undersized for hot arid climates like the southwest.
This is close to the 400 square feet per ton sizing of the hvac industry in chicago and orlando but you will notice the variance due to us adding a kitchen and windows.
Assuming one ton of cooling capacity can cool 400 square feet of your home you ll need about 5 0 tons of air conditioning capacity.
The system capacity will be coded into the model number of the outdoor unit.
This would require 4 39 tons of ac or 455 square feet per ton.
For homes that range 3000 sq.
