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