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

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Local Reviews
for oconomowoc, wi

Rated 5.0 out of 5 stars based on 22 customer reviews

Good explanation and helpful services

I really appreciate how the services and components were explained so I could learn more about the product. Very knowledgeable and helpful staff!

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Great service!

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Great guys great service

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The Best! Beyond trustworthy!

I’ve continued to use Grenz for several years and they never disappoint. Good, honest, hardworking, reliable and knowledgeable are just a few words I don’t just throw around. Jim and all of his employees are good people and beyond trustworthy. To say I trust them is an understatement. I don’t trust too many people. I trust Grenz in my home even if I’m not there. If that doesn’t say something, I don’t know what does. Thanks again Jim for all you’ve done for us!

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Great service, very efficient!! Great guy!!

Excellent service!!

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First time customer

I had my gas fireplace inspected and my furnace checked for the winter season. Jim and Bill were polite, skilled and did an excellent job. Bill caught a wiring issue on my humidifier that was not done correctly by the installer and never caught by the other company I had been using for my maintenance. I feel confident in getting a maintenance contract.

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FANTASTIC SERVICE

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Furnace issue resolved quickly at a great price

I really appreciated the technicians honesty and accurate diagnostic skills. The work was done quickly and I now have heat again.

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Fast and efficient service.

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Amazing service, affordable price!

Jim came out to fix our fireplace that had stopped working. He was able to fix it quickly and at an affordable price. Sometimes having services coming into your home can be awkward, but he was very friendly and explained what the problem was and how he fixed it. Highly recommend Grenz Service!

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Trusted and professional

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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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Great service and price......

I called at 8 AM with a down AC unit and the service came out and it fixed in hour. Unbelievable response.....

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Great service

They responded to my concern immediately, were there quickly the day before a holiday, diagnosed and fixed the problem within minutes, good price. Definitely recommend. Family owned business.

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Great experience!

Great service, friendly, knowledgeable & trustworthy

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Job Locations
for oconomowoc, wi

James P. G.

James P. G. Job Checkin

Hoshizaki ice machine maint.

Hoshizaki ice machine maint.

James L. G.

James L. G. Job Checkin

Service Lennox Fireplace.

Service Lennox Fireplace.

James P. G.

James P. G. Job Checkin

Bryant furnace repair

Bryant furnace repair

James P. G.

James P. G. Job Checkin

Furnace repair


James L. G.

James L. G. Job Checkin

Lennox Natural Gas Fireplace for Pilot Concerns.


James P. G.

James P. G. Job Checkin

Walk in cooler repair


James P. G.

James P. G. Job Checkin

Ice machine installation

Ice machine installation

James P. G.

James P. G. Job Checkin

Walk-in freezer repair

Walk-in freezer repair

James P. G.

James P. G. Job Checkin

Thermostat reprogram

Thermostat reprogram

James P. G.

James P. G. Job Checkin

AC maintenance

AC maintenance

James L. G.

James L. G. Job Checkin

Service Fireplace

Service Fireplace

James P. G.

James P. G. Job Checkin

Walk in cooler repair

Walk in cooler repair

James P. G.

James P. G. Job Checkin

Install

Install

James P. G.

James P. G. Job Checkin

Install unit heater

Install unit heater

James P. G.

James P. G. Job Checkin

Install unit heater