Performed two system heating maintenance Both furnaces are Trane S9V2 two stage variable speed blower models West side (pool room) 16x25x1 filter is good, left the included one at the furnace Blew out Condensate trap Stainless burner upgrade still in good shape Pulled and cleaned flame sensor Humidifier (aprilaire 440) in good working order, #12 water panel in OK condition, no water leaks present. Set duct-mounted humidistat to 40%, opened bypass damper Run tested furnace High fire gas pressure set to 3.5"wc, temp rise 40⁰ Low fire gas pressure set to 1.9"wc, temp rise 35⁰ No concerns found East side Aprilaire 440 humidifier has been disabled at some point in thr past, customer does not want to pursue restoring operation at this time Left bypass damper closed 16x25x1 filter is good, left new one at the furnace Blew out Condensate trap Pulled and cleaned flame sensor Stainless burners in good shape Run tested furnace High fire gas pressure set to 3.5"wc, temp rise 37⁰ Low fire gas