The clear answer

Consider furnace replacement when a qualified assessment identifies an unsafe condition, an uneconomic repair, difficult parts availability or a system that no longer meets the home’s needs. Compare complete installed proposals and operating assumptions.

Ask for evidence behind the recommendation

If a contractor recommends replacement, ask for the condition or failure that led to that advice, what repair would involve, and what remains uncertain. Where safety is at issue, follow the qualified professional’s instructions and do not operate equipment they have shut down.

A simple age rule or one repair percentage cannot cover every home. Compare likely future work, remaining warranties, equipment availability, expected use and how long you plan to keep the home.

Compare like-for-like proposals

An equipment-only price and a complete replacement quote are different things. Use the same checklist for each proposal: equipment, sizing, duct and venting changes, controls, fuel or electrical work, removal, permits, commissioning and taxes.

Consider how each option addresses rooms that are too cold, excessive noise or a need for summer cooling. Replacing a furnace without assessing distribution can leave an existing comfort problem unresolved.

Include heat pumps where they fit the brief

A heat pump can provide heating and cooling. A dual-fuel design combines a heat pump with a furnace, but the equipment, controls, ductwork and backup strategy need to be designed together. Ask about heating output at the local design conditions and how the system changes between heat sources.

Check current program rules before committing to equipment. Rebates depend on the home, utility, equipment, installer and application timing; an advertised maximum is not a guaranteed payment.

Before you agree to the work

  • Evidence for repair or replacement
  • The full installed price and exclusions
  • Heating and cooling goals
  • Current rebate eligibility before purchase

Sources & further reading

Prepared by the BC Furnace Repair editorial team using the official sources linked above. Reviewed November 5, 2026. General planning information; a qualified contractor must assess the equipment and property.