Installation and replacement. The company you're matched with sizes a new
system from a load calculation on the house, not the tonnage on the old nameplate, and quotes it
in writing before anything is ordered. Tanque Verde is unincorporated Pima County, so the City of Tucson's permit page doesn't govern it; the contractor confirms the county's requirements and pulls any permit. A replacement in a house of this age should be sized from a fresh load calculation, and it is worth testing the original ducts at the same time. If TEP is your utility, ask whether the company you're matched with is a participating contractor in TEP's Efficient Home Program, which pays instant rebates as listed by TEP in October 2026.
Heating. At about 2,670 feet, Tanque Verde is valley-floor desert where Pima County's code winter design temperature is 35F, so heating duty is light. A heat pump is the sensible default here: the area needs about 2.6 cooling degree days for every heating degree day, so the same unit does the cooling you need anyway.
Maintenance. A tune-up before the first 100F day covers the coils, refrigerant
charge, electrical connections, capacitor and condensate drain, and a second look after the
monsoon clears the dust. Original ductwork in houses of this age is worth a leakage check; ENERGY STAR says a typical forced-air house can lose about 20% to 30% of the air moving through its ducts.
Check any contractor's license with the Arizona Registrar of Contractors at roc.az.gov. Residential air conditioning and heating work falls
under the R-39 class. The service pages below go straight to the job you need.