Call for reliable Furnace replacement in Delafield  WI.
Trust your Furnace installation or replacement in Delafield  WI to a American Standard Customer Care Dealer.
250 West Main St. • Delafield, WI 53018
Grenz Service Company, LLC has certified technicians to take care of your Furnace installation near Pewaukee WI.
See what makes Grenz Service Company, LLC your number one choice for Furnace repair in Oconomowoc WI.

Who We Are

Who We Are

Excellence has been our hallmark at Grenz Service Company, LLC since 1987

Grenz Service Company is a Waukesha and Jefferson County area favorite, bringing friendly, dependable heating and cooling solutions to businesses and homes.

Led by founder Jim Grenz, Sr. and son Jim Grenz, Jr., 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!

Trust your home comfort to us for your next Furnace in Oconomowoc WI
Grenz Service Company, LLC has certified technicians to take care of your Furnace installation near Pewaukee WI.
Contact Information
Contact Information
We offer technical excellence along with a promise of integrity and knowledgeable workmanship to all of our customers in the Waukesha and Jefferson County since 1987.
250 West Main St. • Delafield, WI 53018
(262) 646-3880
(262) 646-4764
Monday - Friday  |  8:00am - 5:00pm
Get in Touch
Do you have a last minute emergency? Is it time to complete that new installation? We are here to help guide you every step of the way!
Schedule Service
Get an Estimate

24 Hour Emergency Service Available • 7 Days a Week

For the best Furnace replacement in Oconomowoc WI, choose a BBB rated company.
Check out our Furnace service reviews in Delafield  WI on angies list