What goes into a furnace installation quote
Equipment type. A single-stage 80% AFUE gas furnace is the budget option and is common in DFW because heating hours are moderate. Two-stage and variable-speed furnaces cost more but improve comfort and, more importantly here, improve summer airflow and humidity control for the AC side.
Compatibility with your AC. The furnace houses the blower that moves cooled air in summer. If the new furnace's blower and the existing evaporator coil aren't matched, cooling efficiency suffers. A good installer checks this.
Venting and gas. Older DFW homes may need updated venting or a gas line inspection. Attic installs need proper platform and drain pan work.
