HOW TO USE IT
How to use the Furnace Replacement Cost Calculator
- 1
Choose the type (standard, high efficiency or condensing).
- 2
Select the furnace size.
- 3
Set labor hours, ductwork and old-unit removal.
- 4
Review the total cost and line-item breakdown.
THE MATH
Furnace replacement cost formula
Total = furnace × size + labor + ductwork + removal + permitsA high-efficiency furnace runs ~$5,000, condensing ~$6,500, standard ~$3,500. Size adds 0-25%. Labor runs ~$65/hr. New ductwork adds ~$2,500.
PRACTICAL EXAMPLE
High-efficiency furnace, medium size, 12 hrs, existing ducts
Furnace = $5,000. Labor = 12 × $65 = $780. Ductwork = $0. Removal = $400. Permits = $350. Total ≈ $6,530.
FAQ
Frequently asked questions
How much does a furnace replacement cost in 2026?
Nationally, $3,500-$8,000 installed depending on type and brand.
Do I need new ductwork?
Only if damaged; new ducts add $2,000-$3,500.
Which type should I choose?
High efficiency (90%+) is the best value for most homes.