Product Support
Help for installing your software, using your software, installing patches or upgrades, or technical support for all our products is provided through our support section. If you would like to speak directly to a Technical Support Representative, Please call us: 1-406-293-3616. We are here to assist you between the hours of 8:00am - 4:15pm MST (M-F)
Support
We've released a Constructor 16.5 beta version with Modbus -- For current 16 users
It requires a Constructor 16 full version serial number to install. See our download page to give it a try.
We now have a Remote Access Constructor License for schools
Train your students remotely. See our School/Student page for more information or give us a call.
We've released Our Constructor 16 Electrical Ladder Diagram Software
Check out some of the new features.
Take a look and download a Free trial.
Constructor 16
We've released Our Residential Wire Pro 5.0 Electrical Floor Plan Software
Check out the better PDF import export features including higher resolution.
Take a look and download a Free trial.
Residential Wire Pro 5.0
Over 30 Years and Still Going Strong.
We've manufactured and sold quality electrical design and training software for over 30 years. Thank you for your support, ideas and suggestions over the years.
Thanks,
Kevin Christensen
VP CMH Software
Contact Us
Manufacturing quality electrical software since 1994
Here are some quick buy links to some of our most popular products. Join the thousands of electrical contractors, corporations, electricians, engineers, training centers and schools that have purchased our software since 1994.
Constructor 16 - Electrical Ladder diagram Software
Residential Wire Pro 5 - Electrical Floor-Plan Software
Buy Constructor 16
Buy Residential Wire Pro 5
Buy Posters
See all Products
Download trial and Demos of our software
Here is a quick link to our download page where you can download free trials, demos and PDF brochures.
Download Now
Monthly Specials for June 2025
Please check back every month for money saving specials on our software.
These special monthly sales are for end users only - no sales to distributors. School Instructors and Students:
Please see our school discount page for academic discounts.
Upgrade your Constructor version 15 to version 16 for only $199
Constructor Information
Upgrade your Constructor version 14 to version 16 for only $249
Constructor Information
Upgrade your Constructor version 13 to version 16 for only $299
Constructor Information
Upgrade your Constructor version 12 to version 16 for only $349
Constructor Information
Residential Wire Pro 5.0 for only $299 or upgrade from RWP 4.0 for $149
Now with improved PDF Import and Export
Residential Wire Pro Information
Buy Constructor 16
More Info Constructor 16
Buy Residential Wire Pro 5
More Info RWP 5
More Info on Our Other Electrical Products
