Field glossaryBalance pointOutdoor temperature where a heat pump's output equals the room's heat loss; below it the strip helpsUsed across 2 Anvilfield field guides, most in HVAC. Where this shows upHVACPTAC and PTHP field guideHVACHeat pump fundamentals field guide Related termsAuxiliary / emergency heatCOPReversing valveSEER2 / HSPF2 Back to the full field glossary