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Installation Notes: <br /> - Removal of 2 existing gas furnaces and associated flue gas venting <br /> Install 2 furnaces with twinning kit for 2 stage heat system <br /> - Install new 3"PVC/DWV exhaust and intake pipes for each furnace through roof for sealed combustion operation <br /> - Reconnect to existing gas line <br /> - Install condensate pump and pipe condensate to approved drain location <br /> - Install low leak damper on outside air intake duct <br /> - Install CO2 sensor in classroom <br /> - Install DCV controller to operate outside air damper and furnace blower <br /> - Set up controller to close the outside air damper 100%when space is unoccupied based on thermostat programming <br />