
Serving Delavan, WI and surrounding areas
Approved
In business since 1987
Free estimates
Emergency services offered
"Excellent service quick but thorough! High quality work! Water heater install was great looks good!"





+8

*The Angi rating for Boiler Installation companies in Delavan, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Installation needs.
*The HomeAdvisor rating for Boiler Installation companies in Delavan, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Installation needs.
Last update on July 25, 2025

Serving Delavan, WI and surrounding areas
Approved
In business since 1987
Free estimates
Emergency services offered
"Excellent service quick but thorough! High quality work! Water heater install was great looks good!"





+8

Serving Delavan, WI and surrounding areas
Approved
In business since 2005
Free estimates
Warranties offered
At Southport Home Services we're A+ rated by the BBB. Our technicians are NATE certified to meet national standards of excellence, and we're a Carrier® Factory Authorized Dealer, recently cited as the #1 medium-sized business to work for by the Milwaukee Journal Sentinel. We treat our team well and hold them to high professional standards. Our up front, transparent pricing, great customer service, and honesty in our business practices make us the plumbing and HVAC company that you'll feel good working with on a regular basis, with 100% satisfaction guaranteed.





+2

Serving Delavan, WI and surrounding areas
In business since 1949
Free estimates
Emergency services offered
"Harker Heating And Cooling is the best HVAC contractor we have ever worked with in 40 years. Their web site proudly says they are an “honest company with Midwestern values.” That is absolutely true. Their representative provided in-depth advice, answered our questions. and returned our messages. Their techs were knowledgeable, professional, careful, and friendly. They were on time, on call, and on budget. The service they provided for us over the years could not be better. So when the time finally came to replace our old furnace and A/C we selected them. Unfortunately, they encountered many unexpected problems installing our new equipment. Many more than they had anticipated for the job. But their representative pledged to address every one of them no matter how hard it was for them or how much of their time it took. And that is exactly what they did. No quibbling and no questions. They got the job done right. If you want an honest family contractor who stands behind what they do, and lives by those Midwestern values, then this is the company to hire. You will be glad you did. Doug and Margie King Mount Horeb, Wisconsin"




Serving Delavan, WI and surrounding areas
In business since 2003
Free estimates
Emergency services offered
"Absolutely a great company to work with from all aspects. We had a large project to replace both the furnace and central AC systems, and also replace the main ductwork to create separately controlled âzonesâ for the first and second floors. With the old system the second floor was always too hot in the summer. Through research on my own I had already decided on the highest level Bryant âEvolutionâ units for both the furnace and AC and for the new zone control. The project was too large for the contractor we had been using to service the old units, so the search was on for a factory authorized Bryant dealer to install the new system. The choice of Square One was easy. Steve the owner came for the estimate, super knowledgeable about everything with the Evolution system including the details of the zone controls, and he prepared the proposal for us on the spot. I had originally intended to go through the usual hassle of getting at least three estimates, but I already had a ball park idea on the cost from my own research and after meeting with Steve there was no need to look any farther. Also we had a special request to relocate the intake/exhaust pipes of the old system to a difficult new location because we didnât like where they exited on the side of the house, and Steve was happy to accommodate the request. I thought early September would be a good choice for the installation since would we probably would not need either the AC or furnace during the construction, but as bad-luck would have it a hot and humid wave of weather came right at the start date. Since the project was large it ran across four days and our crew of Jeremy and Josh did an outstanding job of minimizing the time that the AC was down, and gave us frequent updates on how things were going. They called every day when they were on the way, always came on time, friendly, knowledgeable, and super neat and orderly with all of the piping, ductwork, wiring and general work area. Co-owner Lee and Shaw came to finish up the intake/exhaust (on a Saturday) and did a fantastic job also. Also they prepared all of the paperwork for the multiple rebates that were included, and Erika and Mary in the office are always friendly and super responsive in answering our questions. The Bryant Evolution system has been great also, the hot and humid week turned out to be a good test for it and it performed excellently. The house has never been so comfortable upstairs prior to this system, and the new âdehumidify-onlyâ mode is great for the humid days without high temperature. Overall working with Square One was fantastic and greatly exceeded our expectations. They have all of our HVAC business from now on and we would highly recommend them to anyone."
Serving Delavan, WI and surrounding areas

Serving Delavan, WI and surrounding areas
Free estimates
Emergency services offered
Credit card accepted
"Called them as A/C was not working. They came out and refreshed freon. that was $215 fee. Our A/C was old and we were advised that it may or may not last. We decided to get a new A/C as ours was 20 years old. They advised me of the different models that they work with and gave me a written estimate and let me choose. The.y also subtracted the cost of the freon from the installation cost of a new A/C. One thing that was very impressive was that they were very punctual and gave us estimated time to have work completed. We ran into many other vendors who could not seem to provide accurate information. My wife and I felt an immediate concern for our worries from Oscar. We felt our needs were met and was very happy with service provided. I appreciated the way we were treated. This is a small business that seems to go the extra mile for you."

Serving Delavan, WI and surrounding areas
In business since 1990
Free estimates
Emergency services offered
"I have been very pleased with all the services that Master's has done for me. They installed a new sump pump, water heater, furnace- air conditioner, kitchen faucet-drain, water softener, and installed new shower plumping(faucet and drains). I join their Membership Club and have been very pleased with the inspections and maintainace of all my equipment. They also did a great job cleaning my ducts. They show up on time, are professional and thorough, they always clean up very well when done. So I plan on having a long relationship with them."





+8

Serving Delavan, WI and surrounding areas
In business since 1959
Free estimates
Emergency services offered
"Awesome! We have never felt more comfortable and satisfied hiring a contractor! Brian came out within a day or two to look over the project, and then within another few days had a written quote! This was a huge project, and they handled it like no one else could. We interviewed 3 other companies and hands down, chose Arctic Air. Within a weeks time, they had removed 2- 250 gallon oil tanks, filled with oil mind you, took out the old oil furnace, replaced with a new gas furnace, and installed air conditioning! Not an easy task on a 125 year old home! Will definitely recommend to everyone!"
Serving Delavan, WI and surrounding areas
In business since 1893
Free estimates
Warranties offered
"The man who came to my house to describe the furnaces and help determine which one I wanted could not have been more wonderful. He was helpful and efficient. We had agreed on a week when the work would be done. The installers called and wanted to come a week earlier. I okayed it, but it wasn't the best day for me. They were nice and efficient. The new furnace appears to be exactly what I wanted. However, the new thermostat control was a different size and shape from the original one and they didn't patch the holes or repaint the edges--not a big deal but when I got a security system a few weeks ago, they did do all that finishing."

Serving Delavan, WI and surrounding areas
In business since 2010
Emergency services offered
Credit card accepted
"Jim responded promptly to my order placed on Angie's List for the Remote Computer Tune Up & Repair Deal. He cleaned up the computer remotely, which was running very slowly, and required frequent re-boots. Computer is running much faster now. Great service. Would highly recommend.
"


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