
Serving Saint John, MO and surrounding areas
Approved
In business since 1999
Free estimates
Emergency services offered
"He did a great job. We needed a new hot water heater, he put one in the next morning. Very honest."

*The Angi rating for Water Heater Service companies in Saint John, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Water Heater Service needs.
*The HomeAdvisor rating for Water Heater Service companies in Saint John, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Water Heater Service needs.
Last update on June 29, 2026

Serving Saint John, MO and surrounding areas
Approved
In business since 1999
Free estimates
Emergency services offered
"He did a great job. We needed a new hot water heater, he put one in the next morning. Very honest."

Serving Saint John, MO and surrounding areas
Approved
In business since 2003
Free estimates
Emergency services offered
"This was a complex retrofit tankless water heater installation and out of 30+ companies called and solicited for this project, Brett and Dunn's HVAC was the only company to 1) entertain performing the installation correctly (gas line sizing and calculations), 2) had prior experiencing working with tankless heaters, and 3) took the time to work with me on a long list of specifications. These are bulletproof systems if the installation is done correctly and Dunn/Brett took the time to ensure the install was on point and everything went smoothly. They also installed a softener and filtration system. Everything went well from bid to install and I highly recommend Brett and Dunn's - will use again as I could not be more pleased!"


Serving Saint John, MO and surrounding areas
Approved
In business since 1985
Free estimates
Warranties offered
"Jacob thoroughly looked over everything; water lines, gas line, igniter, gas valve, connections, etc.. He took the time to make sure everything was working properly and even educated me on a few things I didn't know."





+7

Serving Saint John, MO and surrounding areas
Approved
In business since 1995
Free estimates
Emergency services offered
"Install a heat strip to AC handler in attic. He provides service with a smile."





+9

Serving Saint John, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2022
Free estimates
Warranties offered
"Had them replace master water shut off valve. Did a great job, was quick, efficient, and reasonable!"

Serving Saint John, MO and surrounding areas
Approved
In business since 2000
Credit card accepted
Offers commercial services
You can expect our technicians to provide timely service, a clear explanation of the work to be performed, and upfront pricing. We focus on providing industry best customer service from start to finish. Our technicians are insured, licensed and bonded.





+1

Serving Saint John, MO and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"Noah did a wonderful job explaining what was wrong with my water heater. I appreciated him reviewing all about the new water heater. A very pleasant experience."





+7

Serving Saint John, MO and surrounding areas
Approved
In business since 2020
Credit card accepted
Customers say: Quick response
"Great experience. Phil Smith, the owner, is professional, and explains each step of his work. I use him every year for my annual HVAC check-ups and you should too!"





+17
Serving Saint John, MO and surrounding areas
Approved
In business since 2017
Free estimates
Customers say: Quick response
"Everyone on this team is fantastic. We originally met with Jacob, who was incredibly detailed in the notes he took. He spent a good amount of time with us at our initial meeting to truly understand what we wanted to accomplish. For the second meeting, we met with Jacob and Brian to go over some more items in detail. This is our first home and we relied on their experience when we weren't sure which direction to head into with some areas. The entire team was patient and respectful throughout the entire process, provided updates throughout our remodel, and gave recommendations when we needed them. Everything turned out how we wanted it to and we couldn't be happier. We'll definitely be using them in the future for other projects."





+11

Serving Saint John, MO and surrounding areas
Approved
In business since 2023
Free estimates
Credit card accepted
"This is a good company to deal with. James, the owner, was out within one hour to diagnose our problem. The next morning the technicians, Brian and Josh were out to take care of our drain issues. Brian made a point of showing me the camera footage of the main drain. The did a great job on the main and two other drains. They also cleaned up very well when they were done. Brian also noticed an issue with our bathtub stopper and fixed it without an extra charge. The pricing was transparent. They have a nice email notice system and called when they were on the way. The three men I worked with were all very professional and easy to deal with. I would not hesitate to use them again. Phil Lykens"





+3
From average costs to expert advice, get all the answers you need to get your job done.

Find out the average baseboard and wall heater installation cost in St. Louis, MO. Learn what you can expect to pay and get your home ready for winter.

The cost to flush a water heater in St. Louis, MO, varies based on the type, size, and more. Keep reading to learn how much you could pay.

Running out of hot water too quickly? Use this water heater repair cost guide to see what a fix will cost in St. Louis, MO.

Done with cold showers and dish washing? Hire a water heater installation pro near you to get back to comfort and safety quickly.

Who can install a water heater for you? Look to hire a water heater installation pro or a licensed plumber for this job because of the challenges involved.

The average lifespan of water heaters is 6 to 15 years for conventional models and up to 20 for tankless ones, but it can be less if they are not properly maintained.