Free HVAC Tools for Ontario Builders & Homeowners
Design temperature lookup, quick heat loss estimator, heat pump sizing checker, and permit checklist — everything you need to understand your project before you commit to a permit package. No email required, no login, completely free.
Full CSA F280 Room-by-Room Calculator
This is the most accurate free heat loss tool available for Ontario builders. Unlike simplified estimators, it uses the full HRAI CSA F280-12 methodology — room by room, with actual infiltration calculations. It's what we recommend for anyone who wants to understand their numbers before commissioning a stamped report.
Ontario CSA F280 Heat Loss Calculator — Full HRAI Methodology
Full HRAI
Methodology
Ontario Design Temperature Lookup
The single most common mistake on Ontario heat loss reports — wrong design temperature. Find the correct heating design temp, climate zone, and permit portal for any Ontario municipality.
Values are the January 2.5% design temperature from Ontario Building Code Supplementary Standard SB-1 (2024), Table 2. A municipality not in that table has no number to look up, and this tool will tell you so rather than borrow a neighbour's. SB-1 on ontario.ca.
Why this tool says "not listed" instead of guessing: SB-1 lists a few hundred Ontario locations, not every municipality, and warns that interpolating between them may not be valid. A calculator that prints a neighbour's number for an unlisted town is printing a guess with a decimal point on it. What the design temperature is and why it matters →
Quick Heat Loss Estimator
Get a ballpark heating load for your home in seconds. Enter your floor area, construction type, and municipality — we calculate an estimated BTU/h range and equipment size. Use this for early planning and conversations with your contractor.
Quick Heat Loss Estimator
* Clearview and The Blue Mountains are not listed in SB-1 themselves; both direct designers to the Collingwood row in writing. Towns not in this list are not in SB-1 Table 2 — see why that matters.
This is a planning estimate only. Your building permit requires a BCIN-stamped CSA F280 report based on your actual drawings and wall assemblies.
Get a Permit-Ready Quote →Cold-Climate Heat Pump Sizing Checker
Enter your heat loss result and municipality — we check whether a typical cold-climate heat pump can handle your full design load, estimate rebate eligibility, and flag whether backup heat is needed.
Heat Pump Sizing Checker
Permit Checklist & Design Temperature Reference
Two print-and-keep references used by Ontario builders and homeowners every day. No email required — direct PDF download.
Ontario HVAC Permit Checklist
What every building department in Ontario needs for your new home HVAC permit submission. One page, checkbox format — review it before you submit.
Ontario Design Temperature Reference Sheet
All major Ontario municipalities with heating design temperature, climate zone, and permit portal type. Print-and-keep for builders, contractors, and designers.
If a download doesn't start, contact us and we'll email the PDF directly.
Ready for the Permit-Ready Version?
These tools help you plan and estimate — but your building permit requires a BCIN-stamped CSA F280 report prepared by a qualified designer. Upload your floor plans and we'll deliver the complete permit package in 48 hours.