This NEW & Improved amazing tool performs every function needed by the HVAC professional.

Including both SuperHeat and SubCooling of R410a and R22; a Duct Calculator that calculates CFM, Pressure Drop and Sizing for - Rectangular Metal, Round Metal, AND Round Vinyl Flex. 

It's the only slide rule on the market that has conversion for Smooth Metal to Insulation Lined Metal. 

It also contains:

• Testing for Correct System Airflow for A/C & Heating for both electric and gas
• Pressure Drop Chart
• Wet Bulb Conversion Chart
• Troubleshooting Compressors
• Troubleshooting TXV's (TEV's)
• System Operating Diagnostics
• Capacitors - Laws & Practices
• OHM's Law Wheel
• and every Formula & Conversion needed

For more information and to access over 100 Video Training Tutorials,  

or watch our YouTube video