How to evaluate SEER2, EER2, HSPF2 and AFUE when buying HVAC equipment without assuming the highest rating is automatically the best purchase.
Efficiency ratings allow standardized equipment comparison, but the highest rating is not automatically the best economic choice for every home.
Real savings depend on climate, utility rates, annual run time, existing equipment efficiency, installation quality and how long the homeowner expects to keep the system.
Before paying a large premium for efficiency, make sure the base installation addresses sizing, airflow, duct condition and controls.
Seasonal cooling-efficiency measure used for central AC and heat pumps.
Cooling efficiency at defined rating conditions, useful alongside seasonal ratings.
Seasonal heating-efficiency measure for heat pumps.
Standardized fuel-utilization measure for furnaces and boilers.
Poor airflow, duct leakage or incorrect setup can erode expected efficiency.
Compare added installed cost with realistic annual energy savings rather than relying on percentage claims alone.
Correct sizing, component matching, airflow, refrigerant setup, electrical work, drainage, controls and duct-system condition all affect how new equipment performs after installation.
A higher-efficiency unit installed into a poor air-distribution system can still deliver poor comfort and disappointing real-world performance.
Two proposals can use similar equipment while including very different labor, accessories, warranties, duct modifications, electrical work, permits and commissioning procedures.
Ask contractors to identify exactly what is included, excluded and assumed.
Estimate age, replacement cost and review a proposal.
Understand the complete system before buying.
See why equipment and ductwork must work together.
Understand existing symptoms before replacing equipment.
Use Central HVAC's homeowner tools to estimate system age, develop a preliminary replacement budget and review the scope of a contractor proposal.
Review the pricing, equipment, scope and warranty language in an HVAC proposal.
Decode equipment, efficiency and contractor terminology.