![]() ![]() Usually a British Thermal Unit or BTU, is thought of in the heating sense of the definition. While air conditioning during hot weather, BTU’s measure the amount of heat a system can remove from your home each hour. And it’s all about the BTU’s needed to get the job done. It’s all about the amount of energy required to “condition” the air. Or in more pleasant weather conditions, simply exchanging the inside air with fresh, outdoor air. This could mean cooling the air in the hot weather or heating the air in colder temperatures. To many industry professionals, “air conditioning” means altering the environment within a building to make it more comfortable. Most people think the term “air conditioning” implies cooling the air inside a building. Why is this important? Knowing the amount of energy, measured in BTU’s, is necessary to keep your home comfortable in the both heating and cooling seasons. By definition, a British Thermal Unit is the amount of heat needed to raise one pound of water, 1° Fahrenheit. If you’re charging a cooling system, check out our refrigerant line charge calculator.HOW MANY BTUS DO I NEED FOR MY ROOM OR HOUSE?Ī British Thermal Unit, or BTU, is an international energy measurement. If you’re sizing a cooling system, check out our window air conditioner size calculator to help determine what size air conditioner you will need. Learn more about the cost of the average furnace installation. Professional installers will consider your home’s insulation, door and window sizes and locations, ceiling heights, ducts sizes, and other constraints that affect the choice of system. Consider getting a free heating and cooling estimate for your home. Professional heating and cooling installers can provide a much more detailed analysis of your home to select the correct furnace and air conditioning size, tailored to your needs. We prefer the Nest thermostat, but there are several other great smart thermostats on the market.Īs an Amazon Associate, we may earn commissions from qualifying purchases from Amazon. They also allow you to control your heating and cooling from your smartphone, so you don’t even need to get off the couch. By learning your behavior these thermostats can save you money. By learning when you’re at home and when you’re away, these thermostats can turn down the heat while you’re typically away and turn it up prior to your normal arrival. Smart thermostats can also improve the efficiency of your heating and cooling system. ![]() It may be worth considering a more efficient furnace as less energy will be used to achieve the same heat output. However, if a furnace is rated at 100,000 BTUs and is 92% efficient, then the heat output will be 92,000 BTUs (100,000 ×. ![]() A more efficient furnace will output more BTUs of heat than a less efficient furnace with the same BTU rating.įor example, if a furnace is rated at 100,000 BTUs and is 80% efficient, then the heat output will be 80,000 BTUs (100,000 ×. It may be worth adding insulation to attic spaces and walls to reduce the amount of energy needed to heat the home.įurnaces are rated on their BTUs of energy consumption, not their BTUs of energy output. ![]() Very well insulated and tight homes will require 10% less BTUs to heat since very little heat is lost. Homes that are poorly insulated may require 10% more BTUs to heat due to heat loss. The ranges in the heating climate zone chart above assume a home with average insulation. The table below shows the how many BTUs per square foot you’ll need based on your climate zone. A home in the northern region of the US will require more BTUs to heat than a home in the southern region because it gets significantly colder. The location of your home is a major factor in how many BTUs of heat you’ll need. There are several factors to consider when trying to figure out how many BTUs your furnace should be.Įxperts suggest between 30 and 60 BTUs of heat per square foot, which is a pretty wide range. Alternatively, if the system is sized too large then it will heat or cool the space too quickly, which will cause it to cycle on and off more frequently, causing unnecessary wear and shortening the lifespan of the system.Īccording to the Star Tribune, the constant cycling of an oversized furnace is less comfortable as well, since certain areas of the home heat up too quickly and become too hot before the system turns off. On the coldest or hottest days the system will not be able to keep up. If a furnace or air conditioner is sized too small it will run constantly and not be able to comfortably heat or cool the space. It is very important to size your heating and cooling system correctly for your home. 1 BTU is the equivalent of 1,055 joules or. We often refer to the British Thermal Unit as a BTU, but the rating is actually the BTUs per hour, or BTU/h. 1 BTU is the energy needed to heat 1 pound of water by 1° Fahrenheit. A British Thermal Unit, or BTU is a unit of measurement of energy. ![]()
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