Article 220.83 and existing HVAC loads

[Jlloyd91]

When calculating the load for an existing dwelling where no additional HVAC loads are being installed, (220.83A) where do you add in the existing HVAC loads? Do you just add them in like the nameplate ratings of other fixed in place appliances? I understand that the definition of appliance in the NEC states that an HVAC unit technically is an appliance. Can someone clarify please

 

[jaggedben]

Yes they are appliances. You are overthinking it.

The load you add up in 220.83A is quite simply:
3x sqft
+
4500
+
everything that's hardwired or has a dedicated plug that was installed for it

 

[Jlloyd91]

Ok thank you. Typical for me to overthink lol

 

[kwired]

But only take the larger of the heating or cooling load where they can't run simultaneously.

 

[Jlloyd91]

Right.