: This is the most critical step. You must determine the correct tonnage (for cooling) or BTUs (for heating). Professionals use a "Manual J" load calculation, which considers your home's square footage, insulation, and window placement.
: Even if you buy the unit yourself, the physical installation—including handling refrigerants and electrical work—must be done by a licensed, EPA-certified contractor to ensure safety and maintain the warranty. Key Considerations Before You Buy Buying HVAC Equipment Online
: You can purchase directly from wholesale sites like AC Direct or HVACDirect.com . These sites often provide filters for SEER2 ratings, fuel types (gas vs. electric), and brands.
Buying an HVAC unit online is an increasingly popular way for homeowners to save money, often reducing equipment costs by up to compared to traditional full-service quotes from local contractors. However, this "equipment-only" route shifts the responsibility of sizing and installation logistics onto you. The 3-Step Online Buying Process
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