Reply To: Existing Furnace + new mini-split

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#5939

Pat Splitt
Participant

There are no Energy Budget calculation requirements if all one is doing is adding AC to an existing FAU. The Code always assumes that a ducted FAU includes (at least) a minimum efficiency AC. You would be either meeting or exceeding the existing requirements for the AC efficiency. HOWEVER; check out Section 150.2 (b) 1.E. The existing duct system will have to be sealed and tested!

Pat Splitt