Hours
About Us
RESIDENTIAL / COMMERCIAL / LIGHT COMMERCIAL SPECIALIST
Grenz Service Company is a Waukesha and Jefferson County area favorite, bringing friendly, dependable heating, cooling, and commercial refrigeration solutions to businesses and homes. Led by Jim Grenz, Jr. and Jim Grenz, Sr., our family-run company provides expertise, integrity and a personal touch. We specialize in: - Commercial and residential service on all makes and models - Air conditioner and furnace repair - Maintenance on all brands of air conditioners, heat pumps and furnaces - One-stop installation and service on all commercial refrigeration equipment, including walk-in and reach-in freezers and coolers, back bars and ice machines - Gas fireplace service and maintenance Our helpful, continuously-trained staff is always on standby to answer any questions, and we offer the proven quality of top brand names to ensure that you get the most performance, value and peace of mind possible. We are an independent dealer of American Standard Heating & Air Conditioning products and excel in their installation and service. Expert Solutions. Reliable equipment. Easy-to-talk-to people. For heating, cooling and refrigeration that delivers lasting results, you've got friends at Grenz!
Our Services
- Air Conditioners
- Air Filters
- Boilers
- Commercial Refrigeration
- Ductless Air Conditioning
- Ductless Mini Split
- Furnaces
- Gas Logs/Fireplace
- Heat Pumps
- Ice Machines
- Indoor Air Quality
- Zoning
COUPONS
Local Reviews
AC
Rich - Eagle, WI 53119
Great and courtesy service, gave all the information I needed about the AC and warranty, Very impressed.A
Great Service!
Rick - Johnson Creek, WI 53038
Fantastic!!!
Fantastic Service
Wendy - Waukesha, WI 53188
Jim was outstanding. He took the time to explain everything to me and was so patient. We are very satisfied with them and will call them again.
Great
Liz - Watertown, WI 53094
Perfect. Great day with three men doing their job. We lost power for at least three hours last night. Thermostats did their jobs. Thanks to a wonderful company.
Outstanding work, fair price
Bud - Wales, WI 53183
Consistently responded to requests for service & showed up on time. Thoroughly explained job being done & pricing. Excellent attention to detail. And cleaned up when finished!
Great customer service, Very efficient, Professional
Karen - Johnson Creek, WI 53038
I would highly recommend this company!
Great and timely service!
Ed - Waukesha, WI 53186
Great service
Pauline - Waukesha, WI 53186
Everything was done timely and well. The communication before and after our service was excellent.
Great Service
Bill - Delafield, WI 53018
I called for service on my sisters furnace. After leaving a short message I received a return phone call from Jim that he could be there within the hour. He indeed showed up, went right to work and had the issue resolved within a half hour. He had to get the part, installed it, replaced the filter and cleaned up all within a timely manor. Both Jim and his partner were very professional, polite and a pleasure to do business with.
Great service.
Cyththia - Hartland, WI 53029
Awesome customer service. Fully explained what he was doing. Reasonable pricing. Would definitely recommend.
Respectful. Timely
Ken - Delafield, WI 53018
Jim has a great disposition. always friendly. does his evaluation,tells you about how it will cost, then goes to work & gets it done. never tries to sale you anything you don't need.good about answering any questions one might have..............
furnace/boiler work
Arthur - Delafield, WI 53018
Junior can be counted upon to be immediately in response and promptly replying. Cogent and quickly assessing the issue. He nails it!
Awesome service
Paula - Delafield, WI 53018
Great people to work with. They explain what’s going on and give you a price for parts and service.
Great
Bob - Delafield, WI 53018
I was very satisfied with James promptness and repairs
Great service
Karissa - Dousman, WI 53118
Prompt, polite, accommodating to my busy day and the fact that I wouldn’t be home
Great job
Darrell - Hartland, WI 53029
Explained situation well
Great service and pleasnt personel.
Ralph - Watertown, WI 53094
Awesome Service
Lisa - Pewaukee, WI 53072
Professional, trustworthy, reasonable, and super nice! Would definitely recommend to family and friends!
Grenz
Brian - Delafield, WI 53018
Excellent service as always
Walk in cooler
Americas - Delafield, WI 53018
Great diagnostic and repair work in a very short and precise time limit
Good
Gary - Eagle, WI 53119
True Professionals
Darrin - Delafield, WI 53018
Great customer service and professionalism. Always arrive on schedule. Each tech was very polite, friendly and knowledgeable. Very respectful by covering their feet when moving in and out of our house. The furnace area was left spotless when they were finished. When the project was complete, each tech thanked me for our hospitality and for our business. I will use this as an example in my own business.
Great Service,!
Eric - Brookfield, WI 53045
Arrived early, explain everything they did, asked me if I had questions and they answered them.
Great Service
Phil - Pewaukee, WI 53072
Jim was at my house in 30 minutes after my call. Very knowledgeable, totally professional, and resolved my problem immediately. Even made two additional checks to insure my system was up and running correctly. No question who I’d call if I ever have HVAC problems in the future.
Came right away
Erin - Delafield, WI 53018
Grenz service was great! Jim was able to come out to our house within a week to fix our gas fireplace that had been out of commission for over two years. We originally got a quote for a two month wait from another company, but his fast and great service meant we could surprise our Father with a newly fixed fireplace for his birthday! He checked the light switch to see that the fireplace was not communicating and fixed that and also had special technology to detect the mixture of gas and air so the pilot light would light. Above and beyond, he even cleaned the glass pane and vacuumed the individual parts to make it look new. Additionally, he was able to answer questions and give tips for future problem solving. Very helpful, highly recommend!
James L. G.
Repair fireplace.
James L. G.
Service gas fireplace.
James L. G.
Service fireplace, install new remote control system and new fan automatic operation system with speed control.
James L. G.
Repair fireplace with pilot problem.
James P. G.
James P. G.
American standard system install
James L. G.
Inspect and tuneup 2 fireplaces
James L. G.
Repair fireplace and test
James L. G.
Repair fireplace.
James P. G.
American Standard System Install
James L. G.
Replace floor valve on gas logs fireplace.
James L. G.
Service fireplace.
James P. G.
York ac service
James P. G.
American standard system install
James P. G.
Ductwork modification
James P. G.
American standard system install
James P. G.
American standard package unit installed
James P. G.
Second opinion and clean dirty condenser coil
James P. G.
Carrier air conditioner repair
James P. G.
American standard platinum system install
James P. G.
Carrier air conditioner repair
James P. G.
Fillet cooler repair
James P. G.
American Standard Install
James P. G.
American standard platinum system install
James P. G.
Walk in cooler refrigeration
