Heat Loss and Heat Gain Calculations (CSA F280)
A heat loss calculation works out how much heat each room loses on the coldest day of the year, and how much heat it gains in summer. We do it room by room to CSA F280-12, the method the building code uses for sizing heating and cooling in houses. It is for infill and custom home builders, HVAC contractors and homeowners in Calgary and across Alberta who need a permit-ready report. Most single-family homes take 3 to 5 business days.
- Turnaround
- Most single-family homes take 3 to 5 business days. Larger custom homes and renovations get a firm date with the quote.
- Built for
- Infill and custom home builders, HVAC contractors, Homeowners
- Where
- Calgary and across Alberta.
Scope
What is included
- Room-by-room heat loss at the design temperature for the home's location
- Room-by-room heat gain for air conditioning or heat pump cooling
- Walls, ceilings, floors, windows, doors and below-grade areas taken from your plans
- Air leakage and ventilation loads
- Total heating and cooling capacity the house needs
- Airflow for every room, ready for duct design
- A summary sheet formatted for the permit application
Scope: houses, duplexes and townhomes under Part 9 of the building code, including infills, custom homes, major renovations, secondary suites and basement developments. We do not design commercial (Part 3) buildings.
Process
What you send and what you get back
You send
- Floor plans, elevations and sections (PDF or DWG)
- Window and door sizes, or a window schedule
- Insulation values, or your energy code compliance path
- The project address
You get back
- CSA F280-12 heat loss and heat gain report, room by room
- Permit summary sheet
- One round of revisions if the plans change before permit
FAQ
Common questions about heat loss calculations
Do you do basement developments and secondary suites?
Yes. Basement developments, secondary suites and additions are all covered. Tell us if the suite needs its own system so the calculation matches the permit.
What if the plans change after the calculation?
One round of revisions before permit is included. Bigger changes, like a new addition, are quoted separately before we start.
Can you do a calculation for an existing home?
Yes. If there are no plans, measurements and photos usually work. We will tell you what we need when you send the project.
Other services
- Heat Pump and Furnace SizingFurnace, heat pump and air conditioner sizing from a room-by-room heat loss. Cold-climate heat pumps sized for Calgary winters, with the right backup heat.
- Residential Duct DesignSupply and return duct sizing, register and grille placement, and a duct layout drawn on your floor plans. Built from the room-by-room airflow.
- HVAC DraftingCAD drafting support for HVAC contractors, builders and design firms. We draw your completed design so your team can get back to work.
04 / Quote
Send your plans for a quote
Tell us about the project and Raymond will reply within one business day with a fixed price and a delivery date for your heat loss calculations job.
- contact@ductscale.ca
- Phone
- 825-964-2917