Printable Furnace Heat Load Worksheet
This worksheet is for anyone doing a rough furnace sizing check by room. It has a room-by-room heat load table using the area method, with columns for Room, Area sq ft, BTU/sq ft, and BTU/h. Sample rows include Living room, Kitchen, and Bedroom 1. Column D totals BTU/h for each room.
Free printable · PDF
- 1 page
- US Letter — choose “Fit to page” for A4
- PDF, 54 KB
Free for personal, family and classroom use.
Enter each room’s area and a BTU per square foot factor for your climate, then total the BTU/h column to compare the load. Use it as a rough check only, not a final equipment selection.
Good for
- Estimate heat load for each room
- Total BTU/h for rough furnace sizing
- Check room sizes before selecting equipment
Tip: Print one copy per floor and fill in room areas before adding BTU values.
5 files · XLSX, PDF, DOCX
Get every sheet: Furnace Sizing Template Pack
This sheet plus 4 more in one download, with the editable Excel and Word files. Room-by-room heat load worksheet, fuel-use sizing worksheet, furnace quote comparison sheet, seasonal maintenance checklist and contractor questions.
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