Exhaust Fan Unit Consumption

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Exhaust fan unit consumption.

Press calculate button to get the exhaust fan power consumption results. Turning off exhaust fans when they are not needed will save the cost of electricity needed to power the fan and reduce hvac cost for condi tioned make up air. Use the ventilation calculator to determine the annual energy consumption and cost for heating ventilation air to space temperature. Enter the exhaust fan wattage running hours per day and the electricity per unit rate.

Dp total pressure increase in the fan pa n m 2. P i dp q 1. P i ideal power consumption w. A smaller window unit consumes less electricity about 1 200 watts for a unit that requires 12 000 british thermal units but it won t cool your entire.

Typical central ac energy consumption ranges between 2 000 and 5 000 watts per hour. The ideal power consumption for a fan without losses can be expressed as. Q air volume flow delivered by the fan m 3 s. A central air conditioning unit consumes much more electricity than even several ceiling fans combined.

A small exhaust fan left running at night can be easily overlooked but you may be surprised by the energy cost of leaving it on. The electrical use required for a range of exhaust ventilation fans is shown on the following page based on fan cfm ratings. Basic fan only ventilation units can use as little as about 6 watts for highly efficient models while many standard units often use around 60 watts or more.