Heating Supply Company

Heating Supply Company operates as a wholesale heating equipment distributor in San Carlos, California, holding a 4.5-star rating across 62 customer reviews. Since 1951, the business has served HVAC professionals, roofing contractors, and general contractors throughout the Peninsula region. Located at 535 Old County Road, Unit L, the supplier maintains extended weekday hours from 7 AM to 5 PM and offers Saturday morning availability from 8 AM to noon. While primarily serving licensed trade professionals, the business also accommodates knowledgeable homeowners who arrive prepared with specific part numbers and model information.

The company distinguishes itself through an extensive inventory of sheet metal fittings and ductwork, alongside a full line of GREE heating and cooling products including heat pumps, gas furnaces, air conditioning units, and mini-splits. Their product selection extends beyond HVAC to include rain gutters, downspouts, roof vents, flashing, roof fans, and both galvanized and copper sheets. Reviewers consistently note that their ductwork and fittings offer noticeably higher quality than mass-market alternatives, with competitive pricing that challenges big-box retail options. The combination of specialized trade distribution and retail-accessible inventory creates a unique position in the local market.

Customer experiences reveal a business that rewards preparation. One reviewer describes the staff as helpful toward both novice and professional customers, provided buyers can identify their needed product or even sketch a diagram. Another satisfied customer notes the team retrieved a specific part from the back warehouse when given the product name. However, those without model numbers or part specifications may find the staff too occupied with trade customers to provide lookup assistance. The busiest period occurs early morning when contractors pick up daily supplies, suggesting afternoon visits offer better opportunities for detailed attention.