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Compare HVAC costs in Gaithersburg, MD (2026)
Not sure which option fits? Here's how every HVAC project compares in Gaithersburg — local 2026 estimates plus what each choice is best for. The most budget-friendly option here is Furnace Replacement (from $4,050).
Furnace ReplacementBest value$4,050 – $7,300
Best for: Lowest upfront cost for homes with gas heatTypically $5,700
Central AC Installation$5,800 – $12,350
Best for: Cooling only — pairs with an existing furnaceTypically $9,100
Heat Pump Installation$6,950 – $12,600
Best for: Most efficient; heats and cools in one systemTypically $9,800
Full HVAC System Replacement$8,300 – $15,400
Best for: Best when both heating and cooling are dueTypically $11,850
Often paired with HVAC in Gaithersburg
Homeowners tackling HVAC frequently budget for these too.
Estimates are localized to Gaithersburg (mixed climate) using local labor price levels, climate factors and permit fees. Always confirm with local contractors.