Question 1

How much does it cost to replace an HVAC system?

Accepted Answer

Replacing a full furnace-and-AC system typically runs about $10,000–$16,000 installed for a mid-size home with the existing ducts reused, and more if you add or replace ductwork. A single unit, a mini-split, or a standard-efficiency tier costs less. Use the calculator above for a range matched to your home size, system type, and efficiency.

Question 2

Should I replace the furnace and AC at the same time?

Accepted Answer

If both units are near the end of their life, replacing them together is usually cheaper than two separate jobs — the crew shares one trip, one set of permits, and matched components run more efficiently. Choose 'Full system (furnace + AC)' to price both; pick a single component if only one unit has failed.

Question 3

Which efficiency tier should I choose?

Accepted Answer

Standard efficiency is the budget choice; high-efficiency (higher SEER2/AFUE/HSPF2) is the durable mid-grade that lowers running costs; premium variable-speed equipment sits at the top for comfort and the deepest energy savings. Pick the tier that matches your climate and budget — the calculator scales the estimate accordingly.

Item	Estimate
Outdoor condenser unit	$4,000
Furnace / heating unit	$2,200
Evaporator coil / air handler	$1,500
Refrigerant lineset & connections	$700
Installation labor	$3,900
Permit, disposal & startup	$800
Subtotal	$13,100

HVAC Replacement Cost Calculator

HVAC Replacement Cost by state