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220.83(A) does not address directly how to calculate the load for existing air-conditioning and heating. Should HVAC equipment be included as appliances under 220.83(A)3a?

Question asked by kensykora on Oct 27, 2016
Latest reply on Oct 31, 2016 by jhren1

If A/C and Heating equipment are considered appliances (The definition in Article 100 for appliances does include air conditioning equipment) then the A/C unit would be considered one appliance and the space heating equipment would be a separate appliance or separate appliances. There is no compensation for the omitting the smaller of the two non-coincidental load, and essentially both the heating and A/C loads would be added at 40% demand (this assumes that the remainder of the dwelling would have a load greater than 8 kVA).

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