Doña Ana County

Heating & Cooling in the Desert

From Las Cruces and Mesilla to Hatch, Anthony, Sunland Park, and Chaparral.

Built for Hot Summers and Cold Nights

Doña Ana County sits in the Chihuahuan Desert, in ACCA Climate Zone 3B (hot-dry). Summer highs can top 100°F, and winter nights can drop below freezing, so most homes need both reliable cooling and dependable heat. A properly sized system matters: an oversized AC short-cycles and leaves the house clammy, and an undersized one runs nonstop on the hottest days.

Furnace Repair & Replacement

Gas furnaces are common across the county, and many homes are also moving to heat pumps, which heat and cool with one system. Signs it may be time to replace rather than repair include a system that is 15+ years old, repair costs approaching half the price of a new unit, and rising energy bills. A licensed contractor should inspect the heat exchanger and venting on any older gas furnace.

AC Repair & Installation

Common summer calls include warm air from the vents, frozen coils, refrigerant leaks, and failed capacitors or compressors. Desert dust clogs filters fast here, so changing filters every 1 to 3 months during heavy use helps prevent many breakdowns.

Before You Hire

Swamp Coolers, Licenses & Costs

Swamp Cooler or Refrigerated Air?

Many Southern New Mexico homes still use evaporative (swamp) coolers. According to the New Mexico Office of the State Engineer, a typical cooler uses about one-third the energy of refrigerated air, and works best when humidity is low. At 30% relative humidity it can cool 90°F air down to about 74°F.

The trade-off is water and humid weather. The State Engineer estimates a cooler on a 1,500 sq ft home in Las Cruces uses about 12,457 gallons of water in an average year, and more with a bleed-off valve. During monsoon season, when humidity rises, coolers lose much of their punch. That is why many homeowners add or switch to refrigerated air. A local contractor can tell you whether your ductwork and electrical service can handle it.

Check the Contractor's License First

In New Mexico, HVAC contractors are licensed by the Construction Industries Division (CID) of the Regulation and Licensing Department. Before you hire anyone, look up their license through the CID's "Verify a License" page at rld.nm.gov, and ask for proof of insurance. We only refer homeowners to licensed contractors, but it is always smart to check for yourself.

What Does It Cost?

Costs depend on system size, efficiency rating, ductwork, and labor. As rough ranges from our FAQ, a standard central split AC system installed often runs about $3,500 to $8,500+, and a gas furnace about $2,500 to $6,000. Use our free HVAC cost estimator for a ballpark, then get at least two quotes from licensed contractors.

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More areas: Las Cruces · Mesilla · Chaparral

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