Very good Service

Kenneth from Rockton, IL

100% satisfied was minor fix .Tech also helpful with questions I had about duct work.

very friendly

Randy from Rockton, IL

Best Service, Best Products, Best Prices

Nick from Rockton, IL

Rosario Tripoli has helped us with a number of Black Diamond projects. He is very polite and knowledgeable. We trust what he recommends. We have recommended the company to friends and they were pleased with the service, products and prices.

Excelllant service

Ed from Rockton, IL

Humidistat had failed. Technician installed a new one in a timely manner. He showed us the different models available and explained the differences. We were very satisfied with the work he did.

Great Service as Always

Tom from Rockton, IL

Excellent

Best Service personnel, Best Products and Best Price

Nick from Rockton, IL

Today Rick was checking out a problem. Rosario T. and Tim B and several others have also been here to resolve problems and install new products. All gentlemen and experts in what they do. We recommended Black Diamond to friends. Thanks to all for the great service.

Quick service

Teri from Rockton, IL

Had my furnace cleaned and prepped for the winter. Garry was clean, courteous and thorough.

Great Service, polite and knowledgreable.

Gene from Rockton, IL

Gary impressed me very much. He is a great addition to your team.

Fast service

Christine from Rockton, IL

Great service

Whats expected

Ed from Rockton, IL

Service

Scott from Rockton, IL

Honest and Professional

Deb from Rockton, IL

Greg was honest about what my a/c needed to have repaired. I appreciate his work and professionalism. I will keep cool this summer!!

Great Service.

Tom from Rockton, IL

Great service and done in good time.

Jerry from Rockton, IL

JARRIN DID A GREAT JOB IN A TIMELY MANNER

Very informative

Teri from Rockton, IL