What is the difference between a boiler and a water heater, and can they be used together?

• <div><p>No, boilers and water heaters are not interchangeable because they serve different primary functions. Boilers are used for central heating systems, providing hot water or steam to heat your home. In contrast, a water heater's purpose is to supply hot water for daily household use, such as for faucets and showers. A water heater alone cannot supply the warm water or steam needed for a central heating system.</p><p>While they are not interchangeable, it is common to have both a boiler and a water heater. In fact, a conventional boiler often works best when a water heater system is already in place. The two systems can be combined to provide both heating and hot water, either by pairing a boiler with an indirect water heater or by installing a premade combination boiler-water heater unit. For home heating, some homeowners may also opt for a furnace instead of a boiler.</p></div>

Do both my boiler and water heater need their own expansion tank?

• <div><p>Unless they are connected to the same system, boilers and water heaters will both need their own expansion tanks. The only case they wouldn’t have separate expansion tanks is if the boiler is pulling double duty and managing a heating system while also supplying hot water for a home. In which case, you may not need a hot water heater. </p></div>

Get matched with top water heater pros in Reading, MI

Q: Can you switch from a tank to a tankless water heater?

• <div><p>Going from a tank to a tankless water heater is one of the most effective ways to lower your utility bills. The switch also frees up more space and ensures a consistent hot water supply, as the water is heated on an as-needed basis. It costs between <b>$5,400 and $7,400</b> to install a new tankless water heater. Most installation companies will also help dispose of your old water tank.</p></div>

Q: How long does it take to install or replace a water heater?

• <div><p>The time it takes to install or replace a water heater depends on the type of heater and the complexity of the job. A professional can typically replace a standard tank-style water heater in one to three hours. However, if the work area is tight, such as a small closet or crawl space, the job could take four to five hours. Replacing an existing tankless unit takes about two to three hours, while upgrading from a tank-style to a tankless water heater is more complex and can take four to six hours. The project will take longer if you are switching fuel sources, such as installing a gas heater which can add about an hour to the timeline, or if the unit needs to be relocated.</p></div>

Q: Does installing a water heater yourself void the warranty?

• <div><p>Several things can void the warranty for your water heater. Many water heater manufacturers state that installing your own will void the warranty. However, even if you get away with performing the task yourself, incorrect installation, lack of a building permit, and improper repair work, regardless of licensing status, can all render your water heater unprotected by both the manufacturer's warranty and any installation warranties. </p></div>

Enter your zip and get matched with up to 5 pros

Need a pro for your water heater service project in Reading, MI?

Select your specific project to find the pro for you.

Verified Reviews for Water Heater Service pros in Reading, MI

*The Angi rating for Water Heater Service companies in Reading, MI 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 Reading, MI 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 August 13, 2024

Reviewed in August 2024
Did not need this service, but they said I did. Went ahead and use them, come to find out I had a busted water line and not what they said. Very little communication and took longer than what they said. Way over priced for what I have.
Groundworks
Request a quote
Reviewed in October 2022
It was such a pleasure to find a great contractor to install a new water heater and water softening system at my lake house. From the first contact, to the home visit for the evaluation to the installation, 1st Choice Water Solutions is a class act and deserving of Angi's top rating. Everyone...
1st Choice Water Solutions LLC
Request a quote
Reviewed in July 2021
We had an emergency with one of sprinklers, it would not shut off and was spraying water everywhere. We had to shut off the water to the entire house. I contacted Mario and he responded immediately. He already had the parts needed for the repair and had everything fixed within 3 hours of our...
Mario Landscaping
Request a quote
Reviewed in July 2020
We had a basement that always had water in it almost year round. We decided to sell the house and move to North Carolina. Still trying to sell the home we decided to have a French Drain System put in with a bleeder line, as it would not sell as it was. The Stay Dry team was excellent from start...
Stay Dry Basement Waterproofing Inc
Request a quote
Reviewed in June 2020
This is a great company to worked with to solve your water issues. They actually show up when they say they well be there and if something happens unexpectedly they come right out!
Coastal Restoration, LLC
Request a quote
Reviewed in September 2017
I finally contacted Doctor Flue. After dealing with water inside my fireplace for almost two years, the issue no longer exists. I wish I had called Doctor Flue the first time because they resolved all of my chimney and fireplace issues, worth every penny, very high quality workmanship and very...
Doctor Flue, inc.
Request a quote
Reviewed in July 2017
I was told there was a crack at the top of my chimney, allowing water to enter the chimney, was told they sealed it and no more water would get in. The next rain storm, tons of water leaking inside, called them to have them come back, was told someone would be out, no one came, called three more...
Best Chimney & Roofing Co
Request a quote
Reviewed in September 2016
Dave from Stay Dry inspected our foundation for a water leak, found no problem, helped me determine that the leak came from a window, referred me to a window company, and then declined to charge me for his service call and help! Quality service from people who care about their customers. Highly...
Stay Dry Basement Waterproofing, Inc.
Request a quote
Reviewed in August 2016
Corey contacted me quickly and worked within my schedule to get new water heater installed painlessly. I'd recommend him to anyone needing a new water heater!
Lee's Plumbing, Inc.
Request a quote
Reviewed in May 2016
I was quite satisfied with the inspection. It was limited because the house was in foreclosure so the electric, gas & water had been disconnected. We could not check those out. And the space below the house & into the attic were narrow, so this was also unable to be checked out thoroughly. But...
Gateway Home Inspection, LLC
Request a quote

Find Water heater pros in Reading

The Grate Haus

4.5(

)

Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Reading, MI and surrounding areas

In business since 1981

Free estimates

Emergency services offered

"We called them on Monday morning and they worked us in to get it done the same day. They installed the hot water heater in a timely manner, and did a great job. Very professional and helpful! Would definitely use again."

Recommended by90%of homeowners

Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Reading, MI and surrounding areas

In business since 2011

Free estimates

Credit card accepted

"The team did a great/wonderful job installing my new water heater!"

Recommended by69%of homeowners

Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Reading, MI and surrounding areas

In business since 2008

Emergency services offered

Credit card accepted

"They are replacing my water heater."

Recommended by81%of homeowners

Request Quote

American Home Shield – Home Warranty

3.5(

5,688

)

Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Reading, MI and surrounding areas

In business since 1971

Credit card accepted

"We pay yearly but we have this is included with our rental property. They are pretty good on most things. We had a hot water heater replaced and they did an excellent job on that. They are very quick on their response. They dont come out here. It is all done on the internet. I just like the idea that one time service charge is so much better than trying to hiring someone to come in. It is more about convenience. It pays for itself."

Recommended by65%of homeowners

Request Quote

Water Heaters questions, answered by experts

No, boilers and water heaters are not interchangeable because they serve different primary functions. Boilers are used for central heating systems, providing hot water or steam to heat your home. In contrast, a water heater's purpose is to supply hot water for daily household use, such as for faucets and showers. A water heater alone cannot supply the warm water or steam needed for a central heating system.

While they are not interchangeable, it is common to have both a boiler and a water heater. In fact, a conventional boiler often works best when a water heater system is already in place. The two systems can be combined to provide both heating and hot water, either by pairing a boiler with an indirect water heater or by installing a premade combination boiler-water heater unit. For home heating, some homeowners may also opt for a furnace instead of a boiler.

Unless they are connected to the same system, boilers and water heaters will both need their own expansion tanks. The only case they wouldn’t have separate expansion tanks is if the boiler is pulling double duty and managing a heating system while also supplying hot water for a home. In which case, you may not need a hot water heater.

Going from a tank to a tankless water heater is one of the most effective ways to lower your utility bills. The switch also frees up more space and ensures a consistent hot water supply, as the water is heated on an as-needed basis. It costs between $5,400 and $7,400 to install a new tankless water heater. Most installation companies will also help dispose of your old water tank.

The time it takes to install or replace a water heater depends on the type of heater and the complexity of the job. A professional can typically replace a standard tank-style water heater in one to three hours. However, if the work area is tight, such as a small closet or crawl space, the job could take four to five hours. Replacing an existing tankless unit takes about two to three hours, while upgrading from a tank-style to a tankless water heater is more complex and can take four to six hours. The project will take longer if you are switching fuel sources, such as installing a gas heater which can add about an hour to the timeline, or if the unit needs to be relocated.

Several things can void the warranty for your water heater. Many water heater manufacturers state that installing your own will void the warranty. However, even if you get away with performing the task yourself, incorrect installation, lack of a building permit, and improper repair work, regardless of licensing status, can all render your water heater unprotected by both the manufacturer's warranty and any installation warranties.

The Reading, MI homeowners’ guide to water heater services

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

See all articles

Heather Ayer
•
Jul 20, 2026Jul 20, 2026
How Much Does Water Heater Replacement Cost? [2026 Data]
Looking to replace or upgrade your water heater? Use this water heater replacement cost guide to see what the work will cost and what factors affect your total.
Scott Dylan Westerlund
•
Jul 10, 2026Jul 10, 2026
How Much Does It Cost to Flush a Water Heater? [2026 Data]
A water heater flush costs $160 on average but can vary based on the unit size, type, labor, location, and more. Keep reading to learn how much you could pay.
Angi
•
Apr 6, 2026Apr 6, 2026
How Much Does Tankless Water Heater Repair Cost? [2026 Data]
Find out the average tankless water heater repair cost, what impacts pricing, and how to save. Get expert tips to plan your repair budget with confidence.
Dan Simms
•
May 21, 2026May 21, 2026
How to Hire a Water Heater Installation Pro
Done with cold showers and dish washing? Hire a water heater installation pro near you to get back to comfort and safety quickly.
Kyle Schurman
•
Jul 9, 2026Jul 9, 2026
Who Can Install a Water Heater In Your Home?
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.
C.E. Larusso
•
Jul 20, 2026Jul 20, 2026
How Long Do Water Heaters Last?
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.