About Big Four

(403) 477-5100

Our Mission & Values

Being a local business owner means Big Four has a better understanding of your needs. We are a family in the community just like many of you. Whether you are installing a whole new system or looking to keep your current system maintained and running smoothly we have the knowledge to help.  We also have extensive experience diagnosing problems to help customers stay comfortable and safe in all seasons.


Rapport with many local owners. 15+ Years of experience with HVAC-R in Alberta. 

Fair Prices

Locally owned and operated means Big Four mechanical knows the cost of running a business in Calgary. They strive to keep cost fair for customers.

Fast & Responsive

With open hours during the week of 8AM-4:30PM and 24/7 on call emergency services, Big Four has you covered whenever you need support.

Satisfaction Guaranteed

Big Four Mechanical never leaves a customer unsatisfied. If you’re not happy, neither are we! We will work with you through you’re HVAC problems to make sure everything is in place to satisfy your needs.

Our Story & Certifications

Big Four Mechanical is owned and operated by Charles Andre Laprise. 

Charles started his journey into all things heating and cooling back in 2003 when he started an apprenticeship as a Sheet Metal Worker.  He went on to become and red sealed journeyman after completing his education at SAIT in 2008. He continued in that position until he joined Sub Zero Technical in 2013, where he started his refrigeration apprenticeship.  While pursuing this apprenticeship in 2014 he also obtained his Power Engineering 5th class ticket, he then went on to finish his apprenticeship with Reggin, graduating from SAIT as a red seal journeyman in 2018. Soon after this, Charles realized he would be happiest and most effective serving his community by starting his own business. So, in late 2018 Big Four Mechanical was born!  

Once Charles decided to start his own company, the name that came to mind right away was Big Four Mechanical. Not only are the four laws of thermodynamics a large part of his job, but he also has 4 children with his wife of over 15 years.  Charles has lived in Calgary since 1985, he was born in Quebec though, so he is fluent in both french and english.


  • Sheet Metal Journeyman Ticket (Red Sealed) ‘08
  • Refrigeration Journeyman Ticket (Red Sealed) ‘18
  • Class ‘A’ Gas Fitter (Apprentice)
  • Fifth Class Power Engineer (File#A-84552) ‘14