Printable Heating Units and Rules of Thumb Card
This one-page card is for anyone checking heating capacity, comparing equipment ratings, or converting common units to BTU per hour. It lists heating units and rules of thumb in a simple two-column table with Item and Value. The rows include examples like 1 watt = 3.412 BTU/h, 1 kW = 3,412 BTU/h, and 1 ton = 12,000 BTU/h.
Free printable · PDF
- 1 page
- US Letter — choose “Fit to page” for A4
- PDF, 97 KB
Free for personal, family and classroom use.
Use it as a quick reference when reviewing specs, sizing rooms, or checking calculations by hand. Keep it beside a worksheet, calculator, or job notes so you can confirm unit conversions fast without searching through a chart or website.
Good for
- Check watt to BTU/h conversions
- Review HVAC equipment ratings
- Keep beside a heating load worksheet
Tip: Print single-sided and keep it with your calculator for fast unit checks.
2 files · XLSX, PDF
Get every sheet: Room-by-Room Heating Load Workbook
This sheet plus 1 more in one download, with the editable Excel files. Estimate heat loss room by room with wall, window and air-leakage inputs, total the house load and compare equipment options.
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Printable Room Heat Loss Workbook