HVAC Design Northern Ontario — Sudbury, North Bay, the Sault & Thunder Bay. Designed for -28 to -34°C. Delivered Remotely in 48 Hours.
Upload your floor plans today. Get a firm quote in 24 hours. Receive your BCIN-stamped CSA F280 heat loss report, HVAC design & mechanical drawings — no local designer required, accepted by every Northern Ontario building department.
At -34°C, Sizing Errors Aren’t Inconvenient — They’re Dangerous
Thunder Bay designs to -34°C, Sudbury and North Bay to -30°C, the Sault to -28°C. At these temperatures the margin between a right-sized system and an undersized one is frozen pipes and a house you can’t occupy. It’s also where southern rules of thumb fail worst — and where finding a local BCIN designer with capacity can take weeks you don’t have.
Southern Ontario Assumptions
A calculation habit built at -18°C is off by nearly double at -34°C. Every hour of design-day shortfall up here shows on the thermostat — and eventually in the plumbing.
Cold house, frozen pipes“Just Go Bigger” Padding
Overshooting in the other direction wastes serious money at northern fuel prices, and an oversized furnace short-cycles through the nine-month heating season it was bought for.
Pays twice, every winterCSA F280 at Your Real Value
Room-by-room load at -28 to -34°C, equipment sized with honest margins, and hybrid designs (heat pump + gas, electric or wood-compatible) engineered from the actual balance point.
Accepted first submissionExactly What Northern Building Departments Expect to See
New builds, camp and cottage conversions, electric-to-heat-pump transitions and additions — the same OBC 2024 documentation standard applies from Barrie to Thunder Bay, and we deliver it remotely.
Room-by-Room CSA F280 Heat Loss & Gain
Every room calculated separately at Northern Ontario’s -28 to -34°C design temperature — walls, windows, ceiling, floor, infiltration.
Equipment Sizing Sheet
Right-sized furnace, heat pump, boiler, or AC matched to the calculated load — not a square-footage guess.
Duct or Hydronic Layout Drawings
Fully dimensioned supply and return layout with airflow for every room per HRAI standards.
MVDS & Ventilation Design
The Mechanical Ventilation Design Summary — mandatory on every Ontario new-home permit since January 1, 2025 — plus HRV/ERV selection.
Schedule 1 & BCIN Stamp on Every Page
Signed designer declaration and BCIN stamp throughout — exactly what your Northern Ontario building department requires before issuing your permit.
The same house in Toronto would need ~35,000 BTU/h. That gap is why southern sizing habits fail up here — and why the plans examiner checks the design temperature first.
Serving Sudbury, North Bay, Sault Ste. Marie, Thunder Bay & Beyond
Northern Ontario has far more building activity than BCIN design capacity. Our whole model is remote: upload drawings, get the stamped package in 48 hours, submit to your local building department — the same documents a local designer would produce, without the wait.
Heat pumps do work in the North as hybrids: the F280 establishes the balance point, the heat pump carries the shoulder seasons, and the gas, propane or electric backup is sized for design day. All-electric camps and wood-hybrid homes get the same engineering treatment.
Only Need the Heat Loss Report?
The full HVAC design package is $695 flat. If your project only requires the certified CSA F280 heat loss calculation at your northern design temperature, that’s $395 — same 48-hour delivery.
→ Order a certified heat loss calculationHVAC Design & Permits in Northern Ontario — Answers Before You Ask
The questions Northern Ontario homeowners and builders ask most — answered in plain language.
Do you actually serve Thunder Bay and the far north remotely?
Yes — the entire service is remote by design. You upload drawings, we deliver the BCIN-stamped package by email in 48 hours, and it’s accepted by your building department the same as a local designer’s work. Ontario’s BCIN registration is province-wide.
Can a heat pump work at -30°C?
As a hybrid, yes: the heat pump carries most of the season and a properly sized backup carries design day. The F280 establishes the exact balance point — guessing it is how northern heat pump installs get bad reputations. Hybrid design guide →
What about camps and seasonal-to-year-round conversions?
A conversion permit needs a heat loss calculation reflecting the upgraded envelope, plus ventilation design — sealed-up buildings need mechanical fresh air. It’s one of our most common northern project types.
How fast can I have the permit package?
Firm quote within 24 hours of uploading your plans; complete BCIN-stamped package within 48 hours of payment. If we miss the 48 hours, it’s free.
Upload Your Plans. Northern Package in 48 Hours — Remotely.
Get the certified CSA F280 heat loss and mechanical drawings your Northern Ontario permit requires — sized for -28 to -34°C, BCIN-stamped, no local designer wait.
- Free quote — no commitment to buy
- CSA F280 at Northern Ontario’s correct -28 to -34°C design temperature
- MVDS and Schedule 1 included
- BCIN-stamped on every page
- 48-hour delivery after payment