Best Commercial Cooling in Milwaukee WI

Diamond is the best! Fast response time, professional, and super friendly. I love how upfront Diamond is with their pricing and how they give you various options for your budget. No need to ever find a different plumber. Diamond for life!

Awesome company

Very good work. Thanks Isaac

Can't really give a rating, because I had a busted pipe and had no water. Was told they didn't service mobile homes.... although I have seen them multiple times working for the landlord here.

The tech who came out had no idea what was wrong and spent half the time texting photos to a more experienced person to try to figure out what was wrong and the other half trying to take apart and put the furance back together. After an hour and a half he still had no idea what was wrong and didn't have any idea where to go next to figure out the problem. I may as well have thrown the $213 it cost me into the furnace and saved myself the half day I blocked off for his arrival. He left and my furnace was no closer to being fixed. If you use this company ask for a tech to come out who has training in the field or for one to accompany the lesser trained employee. Otherwise you may as well google the problem and attempt to do it yourself.

Journeymen that work there are great, but Brennan sends you a lump sum bill and won't respond to any questions regarding it. I have tried for over 4 months to pay a bill, but I get a different answer every time I ask. I sent a letter to one of the owners, again trying to resolve the $500 plus bill, but never got a response. Horrible customer service. It's too bad as the journeymen that come out for service have always been great. Other tenants in our building downtown also complain about they feel they have been overcharged many times. We have a great HVAC contractor in Brookfield that we'll have to use in the future.

Came out at short notice to service our AC. Prompt, professional, courteous, and knowledgeable service from a great team. Would recommend them to anyone in the area for excellent service and value.

We have used Rozga a few times now and they are excellent. On time, friendly, knowledgeable. They were able to fix our issue with our iron curtain system right away, explained the issue, and gave suggestions on a good regular maintenance schedule to keep it up and running. Will be using them again in the future if any needs arise.

Words cannot describe the professionalism, attention to details, and responsiveness IcyHot founder Hector gave to us! We were referred to him by a friend as the big box HVAC companies were unresponsive to our lack of heat. Hector answered us immediately, came out to our house within an hour for a quote for a new boiler, and installed the next day!!! He would not leave our house on day of install until we had fully function heat. Words cannot describe the amount of faith and hope we put into Hector and his crew to come to our rescue as our home was without heat and 55 degrees (of note the big box company had over a week and did not even provide us with an install date....so yes! we were without any head for over a week until Hector came to us!). The next day he and his crew installed our new boiler, ensured everything was fully functional prior to leaving, even went above and beyond to clean out our 1906 pipes/plumbing which is above and beyond the quote (and didn't charge us extra!!!!). This is the first time in 15 years of using a big box company that we actually have equal heat on our second story which mirrors our first story! Again....words on this review cannot describe our extreme joy and warmth with Hector's professionalism, responsiveness, and HVAC expertise on what our unique 1906 plumbing needed to guarantee us heat and peace of mind. Highly, highly recommend to all!!!!!

Came out twice, charged me $272 and $147 just on the trip charges. I'm on the east side and they are on 56th street. Not sure why these high trip charges were so high. I would try to demand an explanation, but I doubt I would get anywhere. The plumbing work itself seemed fine.