Pittsburgh note
Pittsburgh homeowners should ask where the balance or switchover point is set on dual-fuel systems and why — especially for homes with weak ducts or exposed upper floors.
Why the number is house-specific
Envelope, ducts, and equipment capacity all move the balance point. Two neighbors can need different switchover strategies even with similar square footage.
How to use it in a quote review
If a heat-pump or dual-fuel proposal cannot explain winter capacity and backup behavior, the efficiency story is incomplete for Greater Pittsburgh weather.