HVAC System Replacement Cost in Maryland

Across Maryland, homeowners pay $10,600 to $23,000 for full HVAC system replacement. Climate, labor rates and housing age all move the price. In Maryland's cities, the median home dates to about 1976.

HVAC System Replacement Prices in Maryland Cities

City	Estimate	Heating / cooling degree days
Baltimore	$8,100 to $17,500	3,858 / 1,748
Columbia	$11,500 to $25,100	4,313 / 1,469
Germantown	$11,000 to $23,900	4,977 / 990
Frederick	$9,900 to $21,600	4,275 / 1,397
Waldorf	$10,800 to $23,500	4,588 / 1,029

From 2020 through 2025, NOAA recorded 224 winter storm and ice events, 165 heat events, 60 extreme cold events and 205 hail reports in Maryland. Those are the days when emergency HVAC calls pile up.

When Replacement Makes Sense

Both the heating and cooling equipment are 15 years old or more
Both units keep needing repairs
Some rooms are uncomfortable, and the energy bills are high
An old R-22 AC paired with an aging furnace

What Moves the Price

Furnace plus AC, or heat pump plus air handler
Efficiency ratings: SEER2, AFUE and HSPF2
Equipment sized to the house and climate
Duct repair or replacement
Thermostat and zoning upgrades
Permits and electrical work

Common Questions

How often should an HVAC system be replaced?

Most systems get replaced every 15 to 20 years. AC units and heat pumps usually wear out before gas furnaces do.

Can I replace only the AC and keep my furnace?

Yes, as long as the indoor coil and blower work with the new AC. A mismatched system loses efficiency and can void the warranty.

Other HVAC Prices in Maryland

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