BTU Calculator
AC BTU Calculator
Use this calculator to estimate the cooling needs of a typical board or house, such as finding out the power of a windowpane air conditioner needed for an apartment room or the central air conditioner for an entire house.
| Size of it | |
| Room Ceiling Superlative | |
| Number of People Inside Regularly | |
| Typecast | |
| Insulation Condition | |
| Sun Exposure | |
| Climate | |
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Generic Purpose AC or Warming B.Th.U. Calculator
This is a generalised purpose calculator that helps estimate the BTUs needed to heat or cool an area. The desired temperature change is the necessary increase/decrease from outdoor temperature to hand out the desired indoor temperature. As an example, an unwarmed Boston home during overwinter could reach temperatures as low Eastern Samoa -5°F. To reach a temperature of 75°F, IT requires a desired temperature increase of 80°F. This reckoner can only gauge unkind estimates.
| Room/Firm Breadth | |
| Room/House Length | |
| Ceiling Height | |
| Insulation Condition | |
| In demand Temperature Increase or Decrease | e.g. 75°F for Boston winter, 45°F for Atlanta winter. |
| | |
What is a British thermal unit?
The British Spring Unit, or BTU, is an energy unit. It is approximately the energy needed to heat one pound of water system by 1 F. 1 BTU = 1,055 joules, 252 calories, 0.293 watt-hours, or the energy discharged aside burning unmatched match. 1 Watt is approximately 3.412 BTU per hour.
BTU is often used as a reference point for comparing divergent fuels. Even though they're physical commodities and quantified accordingly, such as by volume operating theater barrels, they can live converted to BTUs contingent the Energy Department Beaver State heat content inexplicit in all quantity. BTU as a unit of measurement of mensuration is more useful than energetic quantity because of fire's intrinsic value as an energy informant. This allows more different commodities with intrinsic energy properties to be compared and contrasted; for representativ, one of the virtually popular is natural gas to oil colour.
BTU rear end also Be used pragmatically as a reference point for the measure of heat that an widge generates; the higher the BTU rating of an appliance, the greater the heating capacity. As for air conditioning in homes, even though ACs are meant to cool homes, BTUs on the field label refer to how much heat the air conditioning behind remove from their respective surrounding air.
Size and Ceiling Height
Obviously, a smaller region board operating theater house with shorter lengths and widths requires few BTUs to coolheaded/heat. Notwithstandin, volume is a more accurate measurement than surface area for crucial BTU usage because ceiling height is factored into the equation; each cubiform cubic square foot of quad volition require a certain measure of BTU usage to cool/heat accordingly. The smaller the intensity, the less BTUs are required to cool or heat.
The tailing is a rough estimation of the cooling capacity a cooling system would need to in effect cool a room/house based only on the square footage of the room/house provided by EnergyStar.gov.
| Area To Be Cooled (square feet) | Capacity Needed (BTUs per minute) |
| 100 to 150 | 5,000 |
| 150 to 250 | 6,000 |
| 250 to 300 | 7,000 |
| 300 to 350 | 8,000 |
| 350 to 400 | 9,000 |
| 400 to 450 | 10,000 |
| 450 to 550 | 12,000 |
| 550 to 700 | 14,000 |
| 700 to 1,000 | 18,000 |
| 1,000 to 1,200 | 21,000 |
| 1,200 to 1,400 | 23,000 |
| 1,400 to 1,500 | 24,000 |
| 1,500 to 2,000 | 30,000 |
| 2,000 to 2,500 | 34,000 |
Insulation Condition
Outpouring insulation is defined as the reduction of hot up transfer 'tween objects in thermal middleman or in the ambit of radiative charm. The grandness of insulation lies in its ability to lower BTU usage away managing As much Eastern Samoa practical the inefficient wasting of IT due to the entropic nature of heat – it tends to flowing from warmer to cooler until there are no more temperature differences.
Generally, newer homes have got better insulating ability than older homes collectible to technological advances American Samoa healthy as a more strict building code. Owners of older homes with dated insulation that make up one's mind to upgrade will not only amend on the power for the home to insulate (resulting in friendlier public utility company bills and warmer winters), but also have the value appreciation of their homes.
The R-value is the commonly used measure of thermal resistance, or ability of stir up to transfer from calorifacient to cold through materials and their assembly. The higher the R-value of a certain material, the to a greater extent it is resistant to heat energy transferee. In other words, when shopping for home insulation, higher R-value products are better at insulating, though they're usually more expensive.
When determinant connected the correct input of insulation conditions into the reckoner, usage generalized assumptions. A beach bungalow improved in the 1800s with zero renovations should probably be sensitive as poor. A 3-year-old home inside a newly improved profession most likely deserves a good evaluation. Windows usually stimulate poorer thermal ohmic resistanc than walls. Therefore, a room with lots of windows normally means poor insulation. When possible, try to install double-glazed windows to improve insulation.
Desired Temperature Increase or Decrease
To find the desired change in temperature to input into the calculator, find the difference between the unaltered outdoor temperature and the desired temperature. Arsenic a general rule of thumb, a temperature between 70 and 80°F is a comfortable temperature for most people.
E.g., a home in Atlanta mightiness neediness to ascertain the BTU usage during winter. Atlanta winters tend to hover around 45°F with chances to reach 30°F occasionally. The desired temperature of the dwellers is 75°F. Consequently, the desired temperature increase would be 75°F - 30°F = 45°F.
Homes in more extreme climates volition obviously require more radical changes in temperature, resulting in more BTU usage. E.g., heating a home in Alaskan winter operating theatre cooling a home during a Houston summertime will require Sir Thomas More BTUs than heating or cooling a household in Hawaiian capital, where temperatures tend to stay about 80°F class-round.
Some other Factors
Plainly, size and space of house operating theatre board, cap altitude, and insulation conditions are very important when decisive the come of BTUs required to heat or nerveless a house, but there are new factors to keep in idea:
- The keep down of dwellers residing inside the living spaces. A someone's personify dissipates heat into the surrounding atmosphere, requiring more BTUs to caller and fewer BTUs to excitable the room.
- Try to place the air conditioner capacitance connected the shadiest side of the house, which will usually be northernmost operating room east of it. The more the condenser is exposed to through sun, the harder it must work collectible to the high encompassing air temperature, which consumes more BTUs. Not only will placing it in a shadier area result in greater efficiency, only it will carry the life of the equipment. It is possible to try and place shady trees close to the capacitance, merely keep in mind that condensers besides postulate good surrounding airflow for best efficiency. Make a point neighboring vegetation does non intervene with the condenser, blocking air flow into the unit and choking it.
- Sized of air conditioning condenser. Units likewise big cool homes too rapidly. Therefore, they don't get over through with the intended cycles, which were intentionally designed for out of the factory. This whitethorn shorten the lifespan of the air conditioning. On the other hand, if the unit is too small, IT leave operate besides oftentimes throughout the day, too overworking itself to exhaustion because it isn't being used efficiently as well-meaning.
- Ceiling fans give the sack assist in lowering BTU usage by improving air circulation. Any home surgery room can be a victim of dead spots, or peculiar areas of uncomely air flow. This can be the back corner of the living board behind a couch, the bathroom with nary vent and a big windowpane, Beaver State the laundry room. Thermostats situated in dead spots hind end inaccurately manage the temperatures of homes. Running play fans can help to disperse temperatures equally across the whole elbow room or business firm.
- The color of roofs can affect BTU usage. A darker surface absorbs more radiant energy than a light 1. Even dirty white roofs (with noticeably darker dark glasses) compared to newer, cleaner surfaces resulted in noticeable differences.
- Efficiency decrease of the warmer or air conditioning with time. Like most appliance, the efficiency of the heater operating theater tune conditioner decrease with usage. IT is non uncommon for an air conditioner to lose 50% or more of its efficiency when lengthways with skimpy liquid refrigerant.
- Shape of the home. A long narrow planetary hous has more walls than a square house with the one square footage, which means heat loss.
What Does 250 Fan Mean in Oven Temperature
Source: https://www.calculator.net/btu-calculator.html