The HVAC system is typically the most expensive mechanical system in a home, costing $5,000–$15,000+ to replace. Yet many homebuyers overlook it during the purchase process. A thorough HVAC evaluation before closing can save you from inheriting a costly problem. Here's what to check.
Before the Home Inspection
Ask the seller:
During the Home Inspection
A standard home inspection includes a basic HVAC check, but it's not comprehensive. Consider hiring an HVAC specialist for a detailed evaluation, especially if the system is over 10 years old.
Key items to evaluate:
System Age — Systems over 15 years are approaching end-of-life. Factor replacement cost ($5,000–$15,000) into your offer.
Refrigerant Type — R-22 systems face expensive refrigerant costs. Budget for replacement within 2–5 years.
Condition of Equipment — Look for rust, corrosion, oil stains (indicating refrigerant leaks), and general wear.
Ductwork Condition — Inspect accessible ductwork for disconnections, damage, and insulation condition. Duct replacement costs $3,000–$8,000.
Temperature Differential — The difference between supply and return air should be 15–20°F in cooling mode. Less than 15°F indicates a problem.
Thermostat — Is it a modern programmable or smart thermostat, or an outdated manual model?
Air Filter — A dirty filter suggests the system hasn't been well-maintained.
Noise — Run the system and listen for unusual sounds that indicate worn components.
Red Flags to Watch For
Negotiating Based on HVAC Condition
If the HVAC system has issues, you have leverage:
After You Buy
Once you close on your new home, schedule a professional HVAC maintenance visit. This establishes a baseline for your system's condition and catches any issues the home inspection may have missed.
Buying a home in West Georgia? Call All Seasons at (770) 809-1355 for a pre-purchase HVAC evaluation. We serve Carrollton, Villa Rica, Newnan, and Douglasville.