Question 1

How much does HVAC replacement cost?

Accepted Answer

A full HVAC system replacement (furnace + central AC) costs $5,000–$12,000 installed. A central air conditioner alone runs $3,000–$7,500. A furnace replacement costs $2,500–$6,000. Mini-split systems cost $2,000–$5,000 per zone. Heat pump systems run $4,000–$10,000. Costs depend on system size (tonnage), efficiency rating (SEER/AFUE), brand, and local labor rates.

Question 2

How long does an HVAC system last?

Accepted Answer

Central air conditioners last 15–20 years. Furnaces last 15–25 years. Heat pumps last 10–15 years. Mini-splits last 20+ years with proper maintenance. Regular maintenance (annual tune-ups, filter changes every 1–3 months) extends system life significantly. If your system is over 15 years old and needs major repairs, replacement is usually more cost-effective.

Question 3

What SEER rating should I look for?

Accepted Answer

SEER (Seasonal Energy Efficiency Ratio) measures air conditioner efficiency. The federal minimum is 14 SEER (15 SEER2 in the South and Southwest). A 16–18 SEER unit offers a good balance of efficiency and upfront cost. High-efficiency units (20+ SEER) reduce cooling costs by 30–50% vs. older 10 SEER systems but cost $500–$2,000 more upfront.

Question 4

Should I repair or replace my HVAC?

Accepted Answer

Use the 5,000 rule: multiply the system's age by the repair cost. If the result exceeds $5,000, replacement is usually smarter. For example, a 12-year-old system needing a $500 repair = $6,000 — consider replacing. Also replace if the system uses R-22 refrigerant (phased out and expensive), is over 15 years old, or has needed repeated repairs in the past 2 years.

Question 5

Are there rebates or tax credits for HVAC?

Accepted Answer

Yes. The federal Inflation Reduction Act provides a 30% tax credit (up to $600/year) for high-efficiency HVAC equipment. Heat pump installations may qualify for up to $2,000 in federal tax credits. Many utility companies offer $100–$500 rebates for ENERGY STAR certified systems. Your contractor can identify all available incentives before you buy.

Question 6

How long does HVAC installation take?

Accepted Answer

A standard central AC or furnace replacement takes 4–8 hours for a single unit. A full system replacement (furnace + AC) takes 1–2 days. Mini-split installation takes 4–8 hours per zone. Ductwork modifications or new duct installation adds 1–3 days. Most installations are scheduled within 1–2 weeks of signing a contract.

System Type	Low	High	Average
Central AC only	$3,000	$7,500	$5,000
Gas furnace only	$2,500	$6,000	$4,000
Full system (furnace + AC)	$5,000	$12,000	$8,000
Heat pump (air-source)	$4,000	$10,000	$6,500
Mini-split (per zone)	$2,000	$5,000	$3,200
Geothermal heat pump	$15,000	$30,000	$22,000
Ductwork replacement	$2,000	$8,000	$4,500

HVAC Replacement Cost Guide

HVAC Cost by System Type

Cost by Efficiency Rating (SEER2)

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