250 West Main St.
Delafield, WI 53018
262-646-3880

Local Reviews

Rated 5.0 out of 5 stars based on 129 customer reviews

Trusted and professional

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Great service

My AC unit stopped working on a Friday morning. Jim was able to come out within a couple of hours that afternoon. He was very knowledgeable and knew right away what the problem was. I appreciated that he explained to me what was wrong. I have Grenz scheduled for general maintenance coming up and know I’ve got a great company coming.

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Excellent service

Grenz crew arrived exactly on time to install a furnace. They estimated that total installation time would have them leaving the site by 2pm. However, every thing went well and they were finished up by 12:30pm.

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Top Notch Company!

We needed both central air and furnace unit. Jim came out to our home to meet with us and provided a very thorough and comprehensive explanation of his products and services. He inspected our home and gave us several options. I have NEVER met an individual so thoroughly knowledgable about the industry, their product line, and technical details. Outstanding person to work with. Very professional communication - and timely! They reminded us of their upcoming visit and provided detailed receipts. (Nothing hand-drawn here!). The install was flawless - professional and hard-working team. I sincerely wish I experienced this degree of professionalism, honesty, and expertise with each company we worked with. We are very grateful we found Jim and his team. They are now our HVAC company and we would highly recommend them to everyone. Thank you Jim!

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Great service

Called before the appointment and was very knowledgeable on my bar coolers

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Outstanding service. Quick response to fix my AC

Jim does a great job of explaining the problem and offering solutions to fix the problem. I can trust Jim.

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This is the way companies should do business

Jim and his crew were outstanding in every aspect. On time, professional, polite, and committed to detail and customer satisfaction. After receiving and reviewing quotes, I knew Jim was the man for the job. When he put the quote together, he sent it to my email immediately for review and it was totally detailed. Remember to always, always, always get any oral agreements put in writing. We worked out an agreement on an additional item, and Jim revised the quote within minutes of hanging up with me. His labor agreement was 4 years as opposed to the standard 1 year with other companies. Looking forward to many trouble free years with our new American Standard AC unit. Choose Jim; you will be glad you did.

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Great service, quick response

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EXCELLENT SERVICE AND INSTALLATION!!!

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Great service

Jim called me back very shortly after I had left a message. He was able to come out to my house the same day. He had been recommended by my son and I too would recommend him. My air conditioning was not working and Jim was able to fix it the same day because he explained that he carries these parts with him so his clients don’t have to wait. Especially in the recent humid days we are having

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Job Locations

James P. G.

James P. G. Job Checkin

System install

System install

James P. G.

James P. G. Job Checkin

American Standard AC install

American Standard AC install

James P. G.

James P. G. Job Checkin

Furnace install

Furnace install

James L. G.

James L. G. Job Checkin

Repair fireplace

Repair fireplace

James P. G.

James P. G. Job Checkin

Trane furnace repair


James P. G.

James P. G. Job Checkin

Train furnace repair


James L. G.

James L. G. Job Checkin

Fireplace service

Fireplace service

James L. G.

James L. G. Job Checkin

Repair Travis Fireplace

Repair Travis Fireplace

James L. G.

James L. G. Job Checkin

Service Fireplace

Service Fireplace

James L. G.

James L. G. Job Checkin

Fireplace service

Fireplace service

James L. G.

James L. G. Job Checkin

Fireplace service

Fireplace service

James P. G.

James P. G. Job Checkin

Carrier ac service

Carrier ac service

James L. G.

James L. G. Job Checkin

Repair Fireplace

Repair Fireplace

James L. G.

James L. G. Job Checkin

fireplace


James L. G.

James L. G. Job Checkin

Tune up fireplace and test.

Tune up fireplace and test.