Heating, Cooling & Energy Efficiency

Understand the system already in the home

Common systems include forced-air furnaces, boilers and hydronic heating, electric baseboards, heat pumps and air-conditioning equipment. They distribute heat differently and need different maintenance. Start with the equipment's make, model, age if known, service records and operating instructions. Note which rooms are uncomfortable, whether the issue occurs in certain weather, and any unusual sounds, odours or cycling.

A heat pump can provide heating and cooling, but its operation depends on equipment, installation, outdoor conditions and the home. Ask about the model's performance information, operating limits, backup strategy and service requirements. Do not infer that a single technology will always lower bills: energy use and costs depend on the building, local utility rates, equipment choice and household operation.

Assess the building before replacing equipment

An undersized or oversized system can create comfort and performance problems. A contractor should explain how heating and cooling loads were assessed rather than selecting equipment only by the old unit's size. The assessment may consider climate, insulation, air leakage, windows, ventilation, room layout, ducts or hydronic distribution, electrical capacity and existing fuel service.

Changes to insulation and air sealing can affect ventilation and combustion safety, so upgrades should be considered as a connected system. An energy evaluation can help identify priorities, but it is not the same as a code inspection or guarantee of savings. Ask what the evaluation includes, what it does not cover and whether separate permits or qualified trade work are needed.

Maintenance, safety and contractor comparisons

Follow manufacturer maintenance instructions for filters, outdoor units, condensate drains and controls. Use qualified technicians for work involving fuel, electrical connections, refrigerant or combustion venting. Keep combustion appliances and vents unobstructed, and treat carbon monoxide alarms or suspected fuel leaks as urgent safety matters: leave the affected area and contact emergency services or the appropriate utility when needed.

Compare written proposals by equipment model, load assumptions, distribution changes, electrical or venting work, controls, commissioning, permits, cleanup, warranty and maintenance. Ask what is excluded and how unexpected conditions are priced. Rebates and incentives are program-specific and can change; confirm current eligibility and application steps with the program administrator before relying on them in a budget.

A practical checklist

Use these points to prepare your next conversation or comparison. Which ones apply will depend on the product, property and jurisdiction.

• Record the equipment model, service history and rooms with comfort problems.
• Ask how the contractor assessed the home's heating and cooling loads.
• Review insulation, air leakage, ventilation and distribution-system issues together.
• Compare the complete installation scope, electrical or venting work and commissioning.
• Confirm permits, maintenance, warranty and what happens if the equipment needs adjustment.
• Verify current program eligibility directly with the administering organization.

Questions to ask a provider or professional

• What assumptions and measurements determine the proposed system size?
• How will the system operate in local winter and summer conditions?
• What backup, electrical, ventilation or distribution changes are needed?
• What is included in commissioning and post-installation support?
• Which permits, maintenance tasks, exclusions and warranty terms apply?

Frequently asked questions