Heat loss. Heat gain. Ventilation. Equipment sizing. Radiant or duct design. A permit-ready PDF package built specifically for Ontario houses and the 2024 Ontario Building Code.
Building a house you own? The Building Code exempts you from the designer qualification requirement (Division C, Sentence 3.2.5.1.(3)(b)(i)). Our software walks eligible owner-designers through every calculation and document. The software does the math — you remain the designer and take responsibility for the information you enter.
For the homeowner building their own house. Step-by-step, OBC-based, CSA F280 calculations — no HVAC experience required. Heat loss permit package $149. Full HVAC permit package $295. One house, no subscription. Founder beta open now at $199 for the full package.
For builders, HVAC contractors and qualified designers: unlimited projects, saved houses, professional permit packages with your designer information. $79/month or $695/year. Launching after the owner-builder beta — ask to join the waitlist in the form above.
Our existing service, unchanged: send us your drawings and we prepare the complete BCIN-stamped design. Heat loss $395 · complete mechanical package $695 · 48-hour delivery, province-wide.
Ontario regulates who may design HVAC systems for permit — but the 2024 Building Code contains a specific exemption: where a person’s design activities relate to construction of a house owned by that person (up to two dwelling units), the designer qualification requirement does not apply. On Schedule 1, eligible owners state the exemption instead of a BCIN number.
Room-by-room and whole-house design heat loss with your municipality’s SB-1 outdoor design temperature.
Cooling load with orientation and solar gains — required when you install A/C or a heat pump.
OBC 9.32 total ventilation capacity, HRV/ERV selection with pass/fail check, and the exhaust schedule.
Heating capacity tied to the calculated load per OBC 9.33.5.1 — not a guess off the box.
Loop schedules, manifolds, water temperatures and GPM — or room CFM, registers, branch and trunk sizing.
Designer information pre-filled with the owner exemption wording, plus every assumption stated in writing.
Every package records the calculation engine version, the CSA F280 edition used and the design temperatures applied — your numbers never silently change when the Code does.
Address and municipality — the correct SB-1 winter design temperature and OBC requirements load automatically.
Add rooms with dimensions and windows. Pick assemblies in plain language — “ICF 6-inch,” “2×6 R22 batt,” “R-60 attic” — the thermal values are built in.
Room-by-room results on screen. Nothing hidden, nothing to trust blindly — you verify and adopt the design as your own.
One button — the complete permit-ready PDF. If your building department comments on the calculations, we correct and regenerate free until accepted.
The exemption applies where your design activities relate to construction of a house you own, containing not more than two dwelling units. It covers your own new build, addition, renovation or secondary suite in your own house. It does not cover designing for friends, clients, or properties you do not own — for those, use our BCIN-stamped service.
The package includes Schedule 1 with the exemption stated, a cover note citing the OBC provision, and the complete technical submission the checklist asks for. Municipalities review the substance, and our free-fix guarantee covers any comments. As beta customers get approvals, we publish the municipality list.
Send us the comment letter — we correct the calculations and regenerate the package free until it is accepted. That guarantee is part of the founder beta.
You complete a guided intake, our system runs the calculations and we deliver your package within 24 hours. The fully self-serve wizard is rolling out to founder customers first — at the price you locked in.
Yes — that service is not going anywhere. Complete BCIN-stamped mechanical package, $695, 48 hours.