HVAC/RFRG contractors in Richland, WA
HVAC/refrigeration contractors install and service heating, cooling, and refrigeration equipment in homes and businesses. Washington currently lists 5 HVAC/RFRG contractors registered in Richland.
Delta Heating & Cooling INC
HVAC/Rfrg · Richland, WA
License #DELTAHC005BR · $4,000 bond
Excel Mechanical LLC
HVAC/Rfrg · Richland, WA
License #EXCELML781QQ · $4,000 bond
Welch Heating & A/C LLC
HVAC/Rfrg · Richland, WA
License #WELCHHC841LS · $4,000 bond
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Built from Washington State L&I public records, updated Aug 14, 2026. No star ratings or reviews — verification only.