This is the quote for installing a new furnace in the rental property Completed the gas furnace replacement. Disconnected and removed old furnace from the attic and put new one in its place. Reconnected the gas, electric, ductwork and vent pipe. Installed a 4â€ chimney liner to properly vent the furnace to the exterior of the home. Installed a new T4 thermostat. Run tested the furnace and made sure water heater pilot was re-lit after we temporarily shut off the gas to re-pipe the furnace. Thank you for choosing Black-Haak. Please take a moment to fill out our online survey.