United Heating & Cooling is a family-owned HVAC contractor founded in 1990 by brothers Joe and Jerry Lambert, now operating under president Mark McWilliams, headquartered in Grandview, Missouri. The company serves both sides of the Kansas City metropolitan area and holds a Kansas-side customer phone line (913-254-3573), with explicit service area listings naming Lenexa and Overland Park, Kansas. United carries Lennox Award Winning Dealer status — Lennox's top dealer recognition tier — alongside NATE certification, LEED AP, and Green Professional credentials. Multi-brand installation capability includes Lennox, Carrier, Trane, and Mitsubishi equipment. Geothermal services include ground-source whole-home heating and cooling, floor heating, domestic water heating, and pool heating, offered as part of a broad HVAC service lineup that has achieved an estimated 25% share of new KC-metro home installations. United is a large metro generalist contractor; geothermal is one service line, not the company's primary specialty. Note: HQ address is Grandview MO; Kansas service area and KS phone line are confirmed via service-areas page and BBB profile.
Verified active operator per https://www.unitedheating.com/about + https://www.unitedheating.com/service-areas + BBB A+ profile (N2 import 2026-05-27)
Grandview MO HVAC contractor serving Lenexa & Overland Park KS. Lennox Award Winning Dealer, NATE certified. Founded 1990. KC metro generalist.
