What Sizes of AC Units Do I Need for 1,900 Square Foot Houses? Air conditioners that are too large for a space tend to stop and start frequently, which is called short cycling. They use excessive energy and do not remove humidity effectively. Air conditioners achieve optimum efficiency when they cool a space sufficiently while running continuously, which is the goal of choosing an air conditioner to fit a 1,900 square foot house. Air conditioners are rated by "tons" of BTUs (British thermal units) of heat that they can remove in an hour. One BTU is enough energy to raise the temperature of one pint of water 1 degree Fahrenheit. One pint of water weighs one pound. An air conditioner ton is 12,000 BTUs, enough heat to melt 1 ton of ice in one day. An average central air conditioner can remove 36,000 to 72,000 BTUs per hour or 3 to 6 tons. The Environmental Protection Agency says the best air conditioner size for a house from 1,500 to 2,000 square feet is an air conditioner capable of producing 30,000 BTUs an hour.

Reduce the BTU capacity 10 percent if an area is heavily shaded. Increase the capacity by 10 percent if the area is in the sun. Add 600 BTUs for each person above two who regularly occupy the area. Increase the capacity by 4,000 BTUs if the unit is used in the kitchen. An air conditioner is least efficient when it starts. Air conditioners that are too large for a space are prone to short cycling. Air conditioners that run on long cycles are cheaper to operate than those that stop and start. Air conditioners condense indoor humidity on cooling coils and drain it as water outdoors. In short cycles the moisture on the coils evaporates back indoors. In humid climates air conditioners that run in long cycles will remove indoor humidity better than air conditioners that are too large. The standard method of calculating the sizes of air conditioners necessary for residential cooling is Manual J developed by the Air Conditioning Contractors of America and the Air Conditioning and Refrigeration Institute.

Manual J calculates all the variables of location, size, shape and construction of your house plus other environmental and energy calculations necessary for choosing air conditioners that run efficiently and save energy on long cycles. Environmental Protection Agency: Properly Sized Room Air Conditioners Air Conditioning Helper: Determining the Right Air Conditioning Size (AC) Cubic feet per minute (CFM) and pounds per square inch (psi) ... Commercial air conditioning units come in a variety of sizes,...... and since there are 337 BTUs per square foot, ... When putting in a central air conditioning unit, you need to make two primary considerations in determining what type of air conditioning... Sizing an central air conditioning unit for a 2,000 square-foot structure requires more than just the basic measurements of area. How Much Cooling Do I Need? Is My Air Conditioner Big Enough?; The Average Central Air Unit for 1,600 Square Feet. A central air conditioning ... what size unit you will need.

Basic Air Conditioning Square Foot Size ... a rough idea of what kind of air conditioning unit you need. Whether you are looking for an air conditioner (AC unit) that fits in the wall, a window or a portable unit, you...how to repair ac in home There are two types of AC units: portable models, which can be anything from window units to free standing types, or whole-house...car ac repair near me Determining the right size boiler for your home comes down to ... cost of ac unit and installationWhat Sizes of AC Units Do I Need for 1,900... Carrier heat pumps range from 1.5 to 6 tons. What Size Air Conditioner Do I Need for a 1,650 Sq. Ft.... How to Calculate Air Conditioner Size for a House How to Size AC Units by Square Footage