Single-Stage vs Two-Stage vs Variable Speed Furnace: Which to Buy?

Single-stage Vs Two-stage Vs Variable Speed Furnace The best furnace type for most homeowners is a two-stage furnace, which costs $8,000 to $12,000 installed, operates at 65% or 100% capacity, and delivers quieter, more even heating than single-stage models without the $13,000+ price tag of variable speed systems. Single-stage furnaces ($5,500 to $7,500) work well […]