Heat performance turn up times one system. Change out filter client supplied. Inspect blower, evaporator and ductwork. Test all safety features High limits and roll outs. Best thermostat for proper operation. Tightened all wire connections. Check heat exchanger for cracks found none. No carbon monoxide a gas leak detected in home. Found two boots that need to be replaced. And the other boots need to be sealed. Leaving quote for that. System is operating at manufacturer specs at this time.