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Calculating your air conditioning requirements
Heat Load
The amount of heat generated is known as the heat gain or heat load. Heat is measured in either British Thermal Units (BTU) or Kilowatts (KW). 1KW is equivalent to 3412BTUs.
The heat load depends on a number of factors, by taking into account those that apply in your circumstances and adding them together a reasonably accurate measure of the total heat can be calculated.
Factors include:
- The floor area of the room
- The size and position of windows, and whether they have blinds or shades
- The number of room occupants (if any)
- The heat generated by equipment
- The heat generated by lighting
Floor Area of Room
The amount of cooling required depends on the area of the room. To calculate the area in square metres:
Room Area BTU = Length (m) x Width (m) x 337
Window Size and Position
If, your room has no windows, you can ignore this part of the calculation. If, however there are windows you need to take the size and orientation into account.
South Window BTU = South Facing window Length (m) x Width (m) x 870
North Window BTU = North Facing windows Length (m) x Width (m) x 165
If there are no blinds on the windows multiply the result(s) by 1.5.
Add together all the BTUs for the windows.
Windows BTU = South Window(s) BTU + North Window(s) BTU
Occupants
You will have to take that into account people who normally working in the space. The heat output is around 400 BTU per person.
Total Occupant BTU = Number of occupants x 400
Equipment
Clearly most heat in a room is generated by the equipment. This is trickier to calculate that you might think. The wattage on equipment is the maximum power consumption rating, the actual power consumed may be less. However it is probably safer to overestimate the wattage than underestimate it.
Equipment BTU = Total wattage for all equipment x 3.5
Lighting
Take the total wattage of the lighting and multiply by 4.25.
Lighting BTU = Total wattage for all lighting x 4.25
Total Cooling Required
Add all the BTUs together.
Total Heat Load = Room Area BTU + Windows BTU + Total Occupant BTU + Equipment BTU + Lighting BTU
This is the amount of cooling required so you need one or more air conditioning units to handle that amount of heat.
What else can I help you with?
Converting volt amps into btu?
This is a two-step question. First, to convert volt-amps into watts, multiply by the power factor. For a heating element like a convector or kettle the power factor is 1, but for a motor it might be 0.7. In the absence of information a power factor of 0.8 can be assumed. Watts are a measure of power and the equivalent imperial measure is BTU per second or BTU per hour. Alternatively a BTU is a measure of energy and the metric equivalent is watt-seconds or watt-hours. A BTU is 1055 watt-seconds (also known as joules). A kilowatt-hour is equivalent to 3412 BTU.
What our the mechanics of changing btu to eletrical current?
To convert BTUs (British Thermal Units) to electrical current, you first need to convert BTUs to energy in joules, as 1 BTU is approximately 1,055 joules. Then, to find the equivalent electrical current, you use the formula ( P = IV ), where ( P ) is power in watts (joules per second), ( I ) is current in amperes, and ( V ) is voltage in volts. By rearranging the formula to ( I = \frac{P}{V} ), you can calculate the current based on the power derived from the BTU conversion and the voltage of your electrical system.
What is the answer if 48000Btu is convert to Horse power?
Btu is a unit of heat.Horse power is the measurement of power.Now,in order to correlate BTU and HP,We can say BTU*TIME(Hr)*3.931e-4=Horsepower. Hence 48000 BTU Hr is 18.8 Horsepower
How many watts in 5200 btu?
0.29308323563892147 watts per btu there for 5200 btu = 1524.0328253223915 watts 1 watt=3.412Btu/hr 1 Btu=the amount of energy needed to heat 1 Lb of water 1 degree. A gallon of water weighs aprox. 8 Lbs.
How many BTU does a 10 watt led bulb create?
About 90 percent of an incandescent bulb's energy is turned into heat; one watt is 3.41 btu/hr, so 10 watts would be about 3 btu per hour.
Calculating Btu's to therms?
1 therm unit equals 100000 btu's
How many BTU's would I need for a 15 by 20 foot room?
5000 BTU's should work for a room that size.
How many air conditioners btu are needed for a living room?
About 8,000 BTU
How many BTU are required to cool a room 11 x 17?
anywhere from 5,000 btu - 6,500 btu
Units used to measure heat?
Joule, calorie, BTU (British Thermal Unit)
How many Btu's to heat a room over 100 degrees?
The number of BTUs required to heat a room over 100 degrees would depend on factors such as the size of the room, insulation, outside temperature, and desired indoor temperature. To calculate the exact BTU requirement, you would typically need to know the specific details of the room and use a heating load calculation formula.
What size btu do you need for a 500 sq ft room portable type?
At least 8000 btu
How many BTU in one metric ton of lpg?
One metric ton of LPG is equivalent to approximately 46,452,000 BTU (British Thermal Units). This conversion factor helps in determining the energy content of LPG for various applications such as heating and cooking.
What is the btu value of heptane?
Heptane has the chemical formula of C7H16. It has a BTU rating of 19,163 BTU per pound and a rating of 4,465.8 kilojoules per mole.
How many BTU needed for a room with 240 square foot?
usually 20 btu's per square foot so......12000 btu's should do fine
What is the recommended room size for a 9000 BTU air conditioner?
The recommended room size for a 9000 BTU air conditioner is around 350 to 400 square feet.
What size of room will 12000 btu 12000 BTU cools what size room?
A 12,000 BTU air conditioner can typically cool a room size of 350-550 square feet. This can vary depending on factors such as insulation, ceiling height, and sunlight exposure in the room. It's recommended to consider these factors when determining the appropriate size air conditioner for your room.
