Book excerpt: 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