A.D.W. Mainland Heat & Air Conditioning Inc. is operated by owner Davyd Williams. Based in Langley BC, our customer service is second to none! Est: January 17, 2000 (GST No: 866 843 515), and BBB Accredited since May 31, 2001.

Our team is friendly, responsive, experienced and knowledgeable. Our mission is to exceed your expectations! We are a company built on a strong foundation of quality service, referrals & happy customers. 

  • We strive for excellence. You can always count on us to be reliable, honest & knowledgeable.
  • We always go the extra mile for each of our customers. You are our #1 priority!
  • We are recognized by our customers, industry & the community as the preferred Home Heating & Cooling Installers.


We carry a full line of consumer heating & cooling products, and our professional installers will be able to help you with all your temperature control needs. We also offer some of the best consumer product warranties available!

As Registered Contractors & Certified Government Licensed Gas Fitters, our customers rely on us to accomplish all work in a timely fashion and to provide not only the best in customer service, but a full line of quality heating & air conditioning products.

Check out our services and products! Read what our happy customers have said about hiring us!