watts (W) to British Thermal Units per hour (BTU/hr). One watt is equal to 3.412142 BTU per hour:1 W = 3.412142 BTU/hrWatts to BTU/hr conversion formulaThe power in BTUIT per hour P(BTU/hr) is equal to 3.412142 times the power in watts P(W):P(BTU/hr) = 3.412142 ⋅ P(W...
To calculate amp draw (A) from watts (W), we also need to know the voltage (V). To calculate amps, we use the basic electric power equation: P(in W)= I(in A)* V(in V) Basically, electric power P (wattage) is calculated by multiplying electric current I (amps) with voltage V...
A room air conditioner's efficiency is measured by the energy efficiency ratio (EER). The EER isthe ratio of the cooling capacity (in British thermal units [Btu] per hour) to the power input (in watts). The higher the EER rating, the more efficient the air conditioner. What is EER an...
Every activity in which you engage, whether it’s napping, doing housework or running a marathon, requires energy. Between the extremes of resting and hard exercise, the human body expends roughly 100 to 1,000 watts of power continually -- all of it coming from food. The sugars, fats and...
Follow the below steps to calculate Btu per hour: First, determine the approximate watts of heat generated within the enclosure: (Amount of heat in watts) x 3.41 = (Amount of heat in Btu/hr) Second, calculate the outside heat transfer as follows: Determine the surface area o...
An air conditioner's BTU (for British Thermal Unit) rating is a measure of its cooling power. An 8,000 BTU window unit, for instance, can typically cool a room of 300 to 350 square feet, according to the California Energy Commission.
We can use calculate fan CFM in two ways: Use the CFM formula. This is how to calculate CFM of the room. Use the room CFM calculator above. This comes quite useful when you are trying to figure out which HVAC units to buy. Here is an example ofhow to select the best ceiling fans...
or therms. A therm is 100 cubic feet, and equivalent to 1000 BTU. Using the right conversion ratios, you can calculate the equivalent number of kilowatt-hours (KWH) in any amount of of energy measured in these other units. You can use the link in the Resources to calculate conversion rat...
Calculate the number of watts-hours used in the summer months by multiplying the number from step two by 1,000. Step 5 Divide the BTUs used in the summer months (the result of step three) by the number of watts-hours consumed in the summer months (the result of step three) to arrive...
An air conditioner with a cooling output of 24,000 BTU/h and the minimum SEER 13 rating can be expected to consume around 1,846 watts (24,000 divided by 13). Assuming this unit operates for 250 hours in a month, the consumption is 461.5 kWh. ...