CSA F280 Calculations for Okanagan Builders
A CSA F280 block-load heat-loss and heat-gain calculation is included at no additional charge with every pre-construction compliance package. Room-by-room F280 is available separately.
The CSA F280 sizing guide explains the difference between a block load and room-by-room F280. The F280 block load is the whole-house load used for equipment selection. Room-by-room F280 provides per-room loads for distribution, duct, and register decisions.
Rules-of-thumb sizing can leave a home with oversized equipment that short-cycles and performs poorly. I calculate the block load for equipment selection and room-by-room loads for duct, register, hydronic, or zoning decisions.
A CSA F280 block-load heat-loss and heat-gain calculation is included at no additional charge with every pre-construction compliance package. Room-by-room F280 is separate and is used when the mechanical design needs per-room loads.
For a standalone calculation, send the drawings, assemblies, window schedule, municipality, and intended mechanical approach if known.
Use the same coordinated drawing information.
- When I am already modelling the home: the drawing set, assemblies, and window schedule already supplied
- For standalone F280: drawings, orientation, room names, ceiling heights, assemblies, window values, municipality, and intended mechanical approach if known
Give the mechanical team verified loads.
- F280 block load for whole-home equipment selection
- Room-by-room F280 for distribution, duct, register, hydronic, or zoning decisions
- Heating and cooling results with the calculation inputs
Complete F280 before equipment is committed.
- Order the calculation at permit stage once drawings, windows, and assemblies are stable
- Send design changes before equipment selection or distribution work is finalized
Match the calculation to the mechanical decision.
- A block load does not include room-level results unless room-by-room F280 is quoted
- The calculation supplies verified loads; it does not imply additional mechanical-design deliverables
What builders ask before booking.
What is the difference between a block load and room-by-room F280?
A block load reports the home's total heating and cooling loads. Room-by-room F280 reports the load for each room or zone.
Is F280 included with energy modelling?
Yes. A CSA F280 block-load heat-loss and heat-gain calculation is included at no additional charge with every pre-construction compliance package. Room-by-room F280 is separate.
When should I order F280?
Order it before mechanical equipment and distribution are finalized, once the drawings, windows, and assemblies are stable.
What do you need to start?
Send the drawings and orientation. Include room names, ceiling heights, window and door information, insulation assemblies, and ventilation details. Add the proposed equipment if known.
Is F280 the same as HOT2000?
No. F280 calculates design heating and cooling loads. HOT2000 models annual home energy performance.
Send the drawings. Get a clear quote.
Send the drawing set or a share link. Include the address, municipality, current stage, and target dates. I’ll confirm any missing inputs and quote the project by stage.