: Best for homes without ductwork or for "zoning" specific rooms. 2. Understand 2026 Technical Standards
: The most common U.S. setup; pairs an outdoor AC with an indoor furnace. buying a new hvac system
: As of January 2026, all new installations must use eco-friendly refrigerants like R-32 or R-454B . Avoid buying older R-410A units, as service costs for them will likely rise. : Best for homes without ductwork or for
: Pairs an electric heat pump for moderate days with a gas furnace for extreme cold to maximize efficiency. buying a new hvac system
: These are the updated efficiency ratings. Look for SEER2 ratings well above the 13.4–14.3 minimum for better long-term savings.
Your climate and existing infrastructure dictate the best fit:
