One BTU is equal to the amount of energy used to raise the temperature of one pound of water one degree Fahrenheit. Divide the amount of Btus per hour by 1, to calculate the amount of MBH. For example, the amount of Btus per hour is 20, Dividing that by 1, would result in 20 MBH. Multiply the amount of watts by 0. One Btu is the amount of heat required to raise one pound of water by one degree Fahrenheit.
Btus per hour Btuh is the benchmark used to estimate the capacity of heating systems, such as gas furnaces. It is a measure of the size of air conditioning system in the traditional Imperial System of measurements. One BTU is the amount of energy necessary to raise the temperature of one pound of water from 60F to 61F.
How many MBH are in a ton? For example, a 30, BTU space heater will heat 1, square feet in Florida, which is in hot climate. You can only heat sq ft if you are living in cold climate. For most areas, 40, BTU will heat square feet.
But if you live in very south, it can heat more than 1, sq ft. A BTU is a measurement of heat — specifically, the heat needed to raise the temperature of one pound of water 1 degree Fahrenheit. The full name is British thermal unit. It is an exact measurement that can be applied to most heating equipment. Did you Know? BTU ratings are also used for air conditioning. And for heat pumps , it is the same as for air conditioners — the amount of heat moved from outside to inside during heating.
Both of these heating equipment types provide both hot water for heat and water used to heat water in your hot water tank. This type of heating equipment is growing in popularity, especially where free or cheap wood is readily available. Local Pro: Standard Boilers? Heating BTU Calculator. Heating Btu Calculator. Locate your climate zone on the map above and provide your square footage. Please log in with your username or email to continue. No account yet? Create an account. Edit this Article.
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Measure the square footage of your entire home. If you're installing a furnace, find the square footage of each room in your home and add them together.
This will give you the total square footage of your space so you can choose a furnace that will adequately heat your home. For a triangular room, multiply the length and width, then divide by 2. Plug the radius into the following equation, using 3. Find out which climate zone you live in to determine the heating factor. Look for a climate zone map online and figure out which zone you live in to help you determine the heating factor, or the number of BTUs you need per square foot to adequately heat your home.
Multiply your square footage by the heating factor for your zone. All you have to do to find out what capacity furnace is best for your home based on its location is to multiply the square footage of the space by the heating factor. Better insulated homes need fewer BTUs per hour per square foot than older homes. If your home is new or well insulated, you can use the lower of the 2 numbers for your climate zone; if it is older or poorly insulated, use the higher number of the range.
Multiply your square footage by 30 BTUs to find out what capacity furnace you need. Alternatively, if you live in an older home in Zone 6, multiply your square footage by 60 BTUs to ensure you purchase a furnace with enough capacity to heat the space.
Note that newer homes tend to be better insulated than older homes because of revisions to building codes over the years. Take the efficiency rating of the furnace into account. Furnaces are rated not by the actual BTU output you receive but by the amount of heat they generate.
How much of the heat a furnace generates input heat that actually reaches you output heat is a measure of how efficient the furnace is. The efficiency is expressed in percentage as a ratio of the output to input heat. Method 2. Measure the square footage of the space you plan to cool. Show 3 more comments. Active Oldest Votes. Comment converted to answer. Improve this answer. Tester Tester k 73 73 gold badges silver badges bronze badges.
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