About My Company

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!