Your home’s heating and cooling system is one of its most expensive components — and one of the most commonly deferred maintenance items. Here’s what to expect when your inspector evaluates the HVAC on a Long Island property.
What Gets Inspected
A home inspector evaluates the furnace or boiler (type, age, condition, operation), the central air conditioning system (if present), ductwork, filters, and the thermostat. They operate the heating system regardless of season and test the AC system if the outdoor temperature allows (typically above 60°F). They check for proper flue connections, clearances, and safety concerns like cracked heat exchangers.
Common Issues in Long Island Homes
Long Island’s housing stock skews old. Many homes still have original oil-fired boilers from the 1970s or 80s — often still operational but at end of expected life. Gas conversion has been common, but conversion quality varies. Central air conditioning wasn’t standard in older homes; window units or ductless mini-splits are common workarounds. Deferred maintenance (dirty filters, neglected annual service) is nearly universal.
How Age Affects Your Negotiation
A furnace or boiler over 20 years old is at the end of its expected life regardless of current operation. An AC unit over 15 years old is the same. If these systems are aging, factor replacement cost into your offer — or negotiate a credit. Typical replacement costs: gas furnace $3,000–6,000; central AC $4,000–8,000; boiler $5,000–10,000.
The Inspection Boys test every HVAC component on Long Island home inspections. Book at homeinspectionsli.com.
