Breathe Easy with 123 Construction's Expert HVAC Services in Phoenix, AZ Phoenix summers and winters demand a reliable HVAC system. When your comfort is compromised, trust 123 Construction to restore harmony to your climate. We're your licensed (339416) and professional HVAC contractor, providing top-notch installations, repairs, and maintenance services to keep your air just right all year round. HVAC, Package Heat Pump, Split System, Gas Furnace, A/C Unit, Gas Pack, Gas Furnace, AC Unit, Heat Pump, AC Units, HVAC, AC Heat Pump, Split AC, Ductless Mini-Split Systems