CSA F280-12 Heat Loss and Peak Load

Heat-loss and peak-load work gives equipment-sizing decisions a documented starting point. The calculation is only as useful as its inputs, so the scope keeps the building geometry, assemblies, windows, design assumptions, and known project constraints visible.

The output supports the next design or contractor conversation. It does not select equipment in isolation or replace the judgement of the professional or trade responsible for the final system.

Useful for

• new-build mechanical planning
• replacement-system sizing support
• comparing the load effect of envelope changes
• a project documentation package that calls for a stated peak load

What the scope can include

• review of the supplied plans and building information
• a documented set of envelope and design assumptions
• heat-loss and peak-load calculations for the agreed building boundary
• a summary of major load drivers and information gaps
• a clean handoff for equipment selection or further design

What to prepare

Provide current floor plans and elevations when available, the project location, assembly descriptions, window and door information, intended indoor conditions, ventilation or infiltration information, and any known mechanical constraints. For an existing building, note renovations or conditions that make the drawings unreliable.

Boundaries

A calculated load is not a comfort guarantee, equipment quote, distribution design, or confirmation that a proposed product is suitable. Results change when geometry, assemblies, air leakage, ventilation, or design conditions change. Missing inputs are recorded as assumptions rather than silently treated as fact.

Next step

Request a quote with the building type, stage, location, reason for the calculation, and the drawings or specifications already available. We will identify any essential gaps before confirming the deliverable.