Compare building-specific heating and cooling loads, matched equipment, complete costs and documented installation performance.
Record the existing heating and cooling systems, service condition, comfort issues and actual energy records. Define what the conversion should serve and whether it will replace or supplement existing equipment. Have the contractor assess distribution, space, electrical capacity, condensate, outdoor siting, noise and any retained fuel system.
Request a building-specific assessment with the actual design weather, envelope, room needs, ventilation and distribution assumptions. Review total, sensible and latent cooling needs as well as heating. If planned envelope improvements change the load, resolve their timing with the designer before selecting equipment.
Obtain the indoor and outdoor model combination, performance tables and matched certificate. Compare heating output at the actual winter design condition, with defrost and supplemental heat addressed by the designer. Compare total, sensible and latent cooling capacities at matching conditions and review minimum modulation and humidity control.
Price equipment, electrical and distribution changes, controls, removal, permits and commissioning. Verify current assistance and payment timing directly. Use explicit seasonal heat assumptions, applicable efficiency data and actual energy tariffs to compare operating scenarios. Discuss auxiliary heat, dual-fuel changeover and outage needs with the designer.
Have qualified people complete the electrical, refrigerant, controls and other work under the actual instructions and local requirements. Obtain the agreed airflow, refrigerant, condensate and control checks. Verify heating, cooling, defrost and supplemental or dual-fuel behavior through the manufacturer’s commissioning process.
Retain the matched models, certificate, design report, settings, warranty, maintenance and service information. Learn the local controls and confirm the household’s agreed fallback arrangements. Review comfort, cycling, noise, humidity and actual energy records during relevant weather, and follow up on unexpected auxiliary use or unmet needs.
Keep the conversion brief, current equipment identities, site constraints and assessment questions. · Retain the full heating and cooling load reports, design conditions and agreed improvement sequence. · Track installation and commissioning responsibilities, inspection outcomes, settings and unresolved items. · Keep commissioning records, operating observations and the next service or performance review.
Use the explicit component worksheet only to inspect a partial steady heating subtotal alongside the complete assessment.
Compare documented heating load and applicable output.
Check separate total, sensible and latent load-capacity differences.
Use Matched seasonal and full-load rating record to retain both supplied certificate ratings; no conversion between them is inferred.
Compare seasonal heating energy costs on the same documented delivered-heat basis.
Compare complete installed quotes and lifetime-cost scenarios using supplied annual costs and a common service horizon.
Reconcile actual project and recurring energy costs in the household plan.
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ENERGY STAR’s heat-pump guidance discusses load assessment, component matching, cold-weather performance and installation considerations.
AHRI Standard 210/240-2026 defines SEER2 and rating conditions. Use the actual matched system’s ratings and performance tables, not a universal SEER-to-EER factor.
ENERGY STAR quality-installation guidance calls for appropriate system sizing, airflow, charge and duct evaluation.
Peak capacity alone does not explain performance during mild weather.
Seasonal ratings, full-load tests and actual operating measurements answer different questions.