4 system Lennox high efficiency two stage variable speed gas furnace heating system tune up, maintenance, cleaning, safety inspection, run test. Install 4 replacement 20x25x2 pleated air filters Resurface flame sensors in the flush drains Shop vac equipment Inspect batteries and thermostat operation in all heating modes 4 system Waterfurnace hydronic heating coils heating run test Transfer hydrozone controls to heat and confirm geothermal heating operation and new tank temperature at 90°f for the winter season with 35 PSI glycol Filter and shop vac service on three whole house dehumidifiers ***System four on the second floor has a leaking air bleed valve that needs replaced ASAP. Glycol solution is leaking on the gas furnace and could potentially cause more damage at any time. (See attached pics) Estimate has been prepared and is ready to be sent for approval