No Energy Audit? Your Heat Pump Still Needs Proper Sizing
Canada's new heat pump rebate will not require an energy audit. Learn why sizing still matters and what to ask for in a home-specific heating plan.
- Hudson HVAC
- 6 min read
Information checked October 24, 2026.
A heat pump should be sized for your home even when a rebate does not require an energy audit. Before accepting a proposal, ask how the contractor determined your heating and cooling needs, how the selected equipment performs in cold weather, and what the backup-heating plan is. A simpler application process does not answer those design questions.
This is especially relevant to Canada’s upcoming National Heat Pump Rebate, which has announced that no pre- or post-installation energy audit will be required. For homeowners preparing now, the useful next step is a clear heating plan that can be checked alongside the eventual rebate rules.
What the rebate announcement actually removes
The Prime Minister’s October 8 announcement introduced a $2 billion home-retrofit investment including the new rebate. The current federal program page describes an early-2027 portal and no energy audit before or after installation. Eligible households installing eligible heat pumps from November 1, 2026 will be able to apply after launch. Further criteria, equipment and application details are due November 1.
These are announced terms. They do not confirm eligibility for a particular home or system. Nor does this article establish a new federal requirement to submit a sizing report: the design checklist below is practical preparation, not an application checklist issued by government.
Ontario’s current Home Renovation Savings heat pump option also says a home energy assessment is not required. It still requires a participating contractor to submit the pre-installation application and obtain approval before installation. Keep those Ontario steps separate from the federal announcement, and verify any proposed combination of rebates under the applicable rules.
An energy evaluation and a sizing calculation answer different questions
An EnerGuide home evaluation examines the home’s energy performance, including insulation, windows, mechanical equipment and air leakage. It can provide useful information for renovation planning.
A heating and cooling load calculation supports the choice of equipment for the space being served. Save on Energy’s Ontario sizing and selection guide recommends a thorough calculation before installation and warns against using traditional replacement rules of thumb. The guide identifies CSA F280 as a recommended approach for calculating heat loads in existing buildings.
If you already have an evaluation, offer it to the designer and describe anything that has changed since it was prepared. If you do not have one, ask what measurements and information the contractor will use. “No audit needed for the rebate” is not a description of that process.
Ask what happens on cold days and mild days
The proposal should explain how the equipment matches the home across its operating range. Save on Energy’s guide highlights both cold-weather performance and minimum output: a system’s ability to turn down matters when the home needs less heat. Choosing a larger nominal size simply to feel safer is not a complete selection method.
NRCan’s heat pump best-practice guidance explains the thermal balance point: the outdoor temperature where heat pump output matches the home’s heating demand. It distinguishes that from an economic switchover based on energy costs. This gives you two useful questions for the designer:
- At what conditions does this home need supplementary heat, if any?
- What determines when the controls bring that heat on or switch systems?
Ask for the answers for your proposed equipment combination, rather than a general claim that a brand “works in Canadian winters.” Record the explanation without changing thermostat installer settings yourself. If keeping a furnace is part of the plan, make sure its role is explicit before agreeing to remove any existing equipment.
Take this short design brief to the site visit
Use this as a conversation record. The contractor supplies the technical conclusions; you supply the priorities and facts about how the home is used. Mark unresolved items as pending, with a contact and follow-up date.
| Item to record | What to ask the contractor to write down |
|---|---|
| Rooms included | Which spaces the proposal serves, and any rooms that rely on separate equipment. |
| Design basis | The calculation method, date and person responsible for the assessment. |
| Equipment selected | Exact indoor and outdoor models, tied to the dated proposal. |
| Winter operation | The explanation of how the system meets demand and when supplementary heat is needed. |
| Controls | Which thermostat or controller is included and who sets up the agreed operating strategy. |
| Open decisions | Missing site information, proposed alternatives and what must be resolved before ordering. |
Beside the table, write your own short account of comfort problems: which room, what time of day, which season, and whether doors are usually open or closed. “Upstairs back bedroom is cold on winter mornings” gives the site visit a clearer starting point than “we need a bigger unit.” It is an observation for the contractor to investigate, not a diagnosis.
Also flag planned renovations. NRCan’s heat pump selection guidance advises accounting for anticipated insulation, window and air-sealing improvements when designing the system. Tell the contractor which work is confirmed and which is only being considered. Ask them to identify the version of the home used in the assessment.
Resolve a design disagreement before ordering
If two proposals recommend different equipment sizes, send both contractors the same design brief. Ask each to explain the difference in assumptions and the intended role of backup heat. A larger unit, a more confident sales statement or a higher estimated rebate does not settle the comparison.
You can request a concise written reply:
Please explain the home assessment behind this equipment selection, the spaces it covers and how it will operate with any backup heat. Identify assumptions that still need checking, and confirm whether planned renovations change the recommendation.
Keep that reply with the quote. If the installer later substitutes equipment, ask whether the design explanation still applies. Our model-substitution checklist covers that change; the quote-comparison worksheet covers price and installation scope.
Sizing also does not answer the separate question of electrical readiness. If the proposed system or backup heat changes, use the electrical planning checklist to ask what needs reassessing.
Plan the next step with Hudson
Hudson provides heat pump installation, service and rebate guidance in Toronto and the GTA. When you contact Hudson, share your existing heating type, comfort concerns and renovation plans so the discussion starts with the home. For existing condominium equipment, see our heat pump repair and replacement service; shared building systems need their own assessment, and service availability does not establish rebate eligibility.
You can also join Hudson’s heat pump rebate interest list for updates and guidance. Hudson is an independent service provider. The list is not a government application, eligibility approval, funding reservation or promise of early funding priority.
Common questions
Does no energy audit required mean the installer can skip sizing?
No. An audit requirement concerns the rebate process. Equipment selection still needs a sound basis in the home’s heating and cooling needs. Ask the contractor how those needs were calculated and how the proposed system will meet them.
Does a cold-climate rating mean a heat pump can heat my whole home alone?
No. The designer must compare the specific system’s output with your home’s heating demand at relevant outdoor temperatures and explain any backup-heating arrangement. A product label alone does not answer that question.
Is a sizing report proof of rebate eligibility?
No. A sizing report supports equipment selection. Household eligibility, eligible equipment, installation timing and application approval must be checked separately under the chosen program.