Answers when you need them

When you need to check specs, confirm measurements, or make a quick metric conversion on the job, find the answers quickly and easily--right in your pocket.

Your one-stop reference for
* Conversion tables, electrical formulas, pipe thread standards, and motor ampere ratings
* Fuel cost comparisons
* Offset calculations and valve details
* Gas and oil burner specifications
* Pipe performance data
* Weather and design factors affecting heating/cooling calculations
* Troubleshooting guidelines

James Brumbaugh (Winchester, VA) is an active HVAC consultant with more than twenty years experience in residential and light commercial construction.   James has authored 15 books on HVAC, construction, and the trades.