CSA F280 Heat Loss Calculation
Permit-ready CSA F280-12 heat loss reports — BCIN-stamped, accepted by every Ontario municipality, delivered in 48 hours.
Starting from $395
Flat rate · No hourly billing · No surprises
Free quote within 24 hours · $0 to ask
Quick Answer
Is a CSA F280 heat loss calculation mandatory for an Ontario building permit?
Yes — a CSA F280 heat loss calculation is mandatory for every new-home building permit in Ontario under OBC Section 9.33.2.2. It must use CSA-approved software and be BCIN-stamped before your municipality will issue the permit. Our reports start at $395 and are delivered in 48 hours.
The Standard Explained
CSA F280-12 is the Canadian standard for determining the required heating and cooling capacity of residential homes. Published by the Canadian Standards Association, it defines the exact methodology for calculating how much heat a home loses under design winter conditions — room by room, wall by wall, window by window.
Unlike online estimators or rule-of-thumb sizing, a CSA F280 calculation uses your actual floor plans, wall assemblies, insulation values, window specifications, and your local Ontario design temperature. The result is a precise, defensible heating load figure your HVAC contractor uses to select the right furnace, heat pump, or boiler.
Every Ontario building permit application for a new home requires this calculation. Your building department will not accept your application without a BCIN-stamped CSA F280 report — no exceptions.
"The heating and cooling equipment capacities shall be determined in accordance with the requirements of CSA F280, Determining the Required Capacity of Residential Space Heating and Cooling Appliances."
Ontario Building Code, Division B, Part 9
Deliverables
Every report is a complete, permit-ready package — not a template or an estimate.
Room-by-Room Heat Loss Summary
Each room is calculated separately — exterior walls, windows, doors, ceilings, floors, and air infiltration. You see exactly where heat escapes and how much.
Total Design Heat Loss (BTU/h)
The total heating load for your home under Ontario design winter conditions — the number your HVAC contractor and permit reviewer both need.
Equipment Sizing Recommendations
Based on your calculated heat loss, we identify the correct output capacity for your furnace, boiler, or heat pump — including backup heat requirements for cold-climate systems.
Design Inputs & Assumptions Summary
A complete record of every value used — wall R-values, window U-values, infiltration rates, and Ontario design temperatures for your specific municipality.
BCIN Designer Stamp & Signature
All documents are stamped and signed by our BCIN-registered HVAC designer — the legal requirement that makes your report valid for building permit submission in Ontario.
One Revision at No Charge
If your floor plans or specifications change before permit submission, we update the calculations at no additional cost. One revision is included with every report.
The Process
From floor plans to permit-ready report in 4 simple steps. Delivered within 48 hours of payment.
Upload Your Floor Plans
Today — freeSend us your plans in any format — PDF, CAD, JPG, or photos of hand drawings. Include your wall assembly and insulation specifications.
Receive Your Quote
Within 24 hoursWe review your project and email a firm flat-rate price within 24 hours. No hourly rates. No surprises.
Pay Securely Online
When you're readyApprove your quote and pay securely. Your report enters production immediately upon payment confirmation.
Receive Your Report
Within 48 hoursYour BCIN-stamped CSA F280 heat loss report is delivered by email — ready to include in your Ontario building permit application.
Ontario Climate Data
CSA F280 calculations use your municipality's official design temperature — the coldest outdoor temperature your heating system must be designed to handle.
| Municipality | Heating Design Temp | Climate Zone | Typical Heat Loss — 2,000 sq ft |
|---|---|---|---|
| Barrie | -24°C | Zone 6 | 26,000 – 32,000 BTU/h |
| Collingwood | -21°C | Zone 6 | 24,000 – 30,000 BTU/h |
| Meaford | -21°C | Zone 6 | 24,000 – 30,000 BTU/h |
| Wasaga Beach | -21°C | Zone 6 | 24,000 – 30,000 BTU/h |
| Midland | -24°C | Zone 6 | 26,000 – 32,000 BTU/h |
| Muskoka / Huntsville | -26°C | Zone 7 | 30,000 – 38,000 BTU/h |
| Orillia | -24°C | Zone 6 | 26,000 – 32,000 BTU/h |
| Toronto / GTA | -18°C | Zone 5 | 20,000 – 26,000 BTU/h |
Heat loss ranges shown are for illustration purposes and vary significantly based on insulation levels, window area, air leakage, and floor plan. Your certified CSA F280 report will use your exact specifications.
Common Questions
Everything Ontario homeowners and builders ask before ordering their heat loss report.
Free quote — upload plans at no cost. BCIN-stamped CSA F280-12 report delivered within 48 hours of payment. Accepted by every Ontario municipality. One free revision included.