Heat Loss Calculation Ottawa
CSA F280 heat loss calculations for Ottawa building permits, at the correct OBC design temperature for Eastern Ontario — BCIN-stamped, accepted by the City of Ottawa Building Code Services, delivered in 48 hours.
A Ottawa building permit requires a CSA F280 heat loss calculation at Ottawa OBC January 2.5% design temperature of -25°C (Supplementary Standard SB-1). That is colder than the GTA (-18°C), so equipment sized on GTA assumptions is undersized for Ottawa. We deliver a BCIN-stamped report with the MVDS and Schedule 1, formatted for the City of Ottawa online permit portal. From $395, delivered in 48 hours.
Ottawa design temperature: -25°C
Under OBC Section 9.33.2.2, your CSA F280 calculation must use Ottawa official January 2.5% heating design temperature from Supplementary Standard SB-1: -25°C (about 4,500 heating degree-days below 18°C). That is colder than the GTA (-18°C), so equipment sized on GTA assumptions is undersized for Ottawa. Using the wrong design temperature is the single most common reason Ontario heat loss reports are returned, so we confirm the SB-1 value for your exact project location before calculating. Confirm yours with our free design temperature lookup.
What a Ottawa HVAC permit package needs
A complete Ottawa building permit package includes a CSA F280 heat loss report at -25°C, mechanical drawings (duct or hydronic layout and equipment schedule), the MVDS ventilation summary (mandatory under OBC 2024), and the Schedule 1 designer declaration — every page BCIN-stamped. A missing piece is the top rejection cause; see our permit requirements guide.
Ottawa permit submission
Ottawa building permit applications are submitted through the City of Ottawa online building permit portal. BCIN is a provincial credential, so we serve Ottawa from anywhere in Ontario — we confirm your design temperature, produce the full BCIN-stamped package, and format it for submission. Free quote within 24 hours of uploading your plans.
Heat Loss Calculations in Ottawa — FAQ
What design temperature is used for a heat loss calculation in Ottawa?
Ottawa uses an OBC January 2.5% heating design temperature of -25°C, from Supplementary Standard SB-1. This is the value your CSA F280 calculation and equipment sizing must use for a building permit. We confirm the exact SB-1 value for your project location before calculating.
How much does a heat loss calculation cost in Ottawa, and how fast?
Our certified CSA F280 heat loss reports start at $395 flat, BCIN-stamped, with a firm quote within 24 hours of uploading plans and delivery within 48 hours of payment. A full HVAC design package with mechanical drawings starts at $695.
Who can sign the heat loss calculation for my Ottawa permit?
For an Ontario permit the CSA F280 report must be signed by a BCIN-registered designer (HVAC-House category) or a licensed P.Eng., with the BCIN number on every page. An HVAC contractor cannot sign unless they personally hold that registration. We are BCIN-registered and serve Ottawa province-wide.
Do you serve Ottawa if you are not located there?
Yes. BCIN is a provincial credential, so a registered HVAC-House designer can prepare and stamp documents for any Ontario municipality, including Ottawa. We confirm your design temperature from SB-1, produce the full package, and format it for the City of Ottawa online permit portal. Delivered in 48 hours.
Related Services & Guides
Building in Ottawa? Get your heat loss report in 48 hours.
Upload your plans and we confirm Ottawa SB-1 design temperature (-25°C), produce the BCIN-stamped CSA F280 and full permit package, and format it for the City of Ottawa online permit portal.