Performed heating maintenance on a 2020 downflow Tempstar 80% efficient two stage natural gas furnace 20x20x1 filter is good, left the included filter next to the furnace Pulled flame sensor and cleaned Burners in good shape Blower is clean Run tested furnace High fire gas pressure set to 3.2"wc, temperature rise 52⁰ Low fire gas pressure set to 1.7"wc Temperature rise 45⁰ Flue pipe in good shape No gas leaks detected Furnace operating within factory specs at this time No concerns found