Water Heaters

Knoxville, TN

24-Hour Emergency Service

Free Estimates 

Maintenance Plan Options

Request Lorem Epsom

Hero Request Form

Reliable Water Heaters for Your Home


John H Coleman is your trusted partner for water heater services in the Knoxville area. As the oldest heating, cooling, electric, and plumbing company in Knoxville, our family-owned business has been serving the community for generations. We provide dependable water heater solutions to keep your home comfortable and your showers warm. As a preferred dealer for leading brands like Lennox, Mitsubishi, and Generac, we offer the latest in water heating technology.

We know that water heater problems can throw off your daily routine. That's why we offer complete services, from installation to repair, to keep your hot water flowing. Our skilled technicians can work with all brands, providing solutions that fit your specific needs. We back our work with a 100% satisfaction guarantee, ensuring you're happy with every service we provide. If you need to upgrade your water heating system or require a quick repair, contact us today.

Why Choose John H Coleman Co


Preferred Dealer for Lennox, Mitsubishi, and Generac

Oldest Heating, Cooling, Electric, and Plumbing Company in Knoxville

100% Satisfaction Guarantee

Locally and Family Owned

No Trip Charge With Coleman Care Agreements

Maintenance Plan Options

Yellow service van parked in front of a brick house. Person by the front door, green shutters, slate roof.

Tankless Water Heaters

Discover the benefits of tankless water heaters in Knoxville, TN. These small units provide hot water as needed, saving space and energy. We'll help you pick the right tankless water heater for your home, giving you endless hot water and lower energy bills.

Water Heater Installation

Count on our skilled team for smooth water heater installations. We'll help you choose the best option based on your home's size and family's needs. Our quick and efficient installation process ensures your new water heater works perfectly with minimal disruption to your daily life.

Water Heater Repair

When your water heater has issues, we're ready to help. Our technicians can quickly diagnose and fix all types of water heaters in Knoxville, TN. With our Coleman Care Agreements, you'll save money on repairs with no trip charges.

$125 Off Standard Water Heater Installation
Call John H Coleman today to schedule your appointment and claim your discount!
Not valid with any other offers or promotions. Restrictions apply. Must mention this coupon at the time of scheduling.
(865) 350-5119
$250 Off Tankless Water Heater Installation
Call John H Coleman today to schedule your appointment and claim your discount!
Not valid with any other offers or promotions. Restrictions apply. Must mention this coupon at the time of scheduling.
(865) 350-5119
Three overlapping speech bubbles with ellipsis dots inside.

Here's what our satisfied customers are saying...

At John H Coleman Co, we take pride in providing exceptional HVAC and plumbing services to our customers. We would be grateful if you could share your thoughts about our business with others. Your feedback helps us improve and helps others make informed decisions. Please take a moment to leave a review of John H Coleman Co and let others know what you think.

Recent Blog Posts

new AC unit
March 25, 2026
When you’re installing a new AC unit for the first time, you should know the differences between forced air systems, mini splits, and heat pump systems.
Person using a wrench to tighten a pipe connected to a water heater.
October 15, 2025
Selecting the best water heater for your home involves careful consideration of several factors, including type, capacity, cost, and installation requirements.
Plumber in blue uniform working on a white water heater, using pliers.
September 30, 2025
Are you wondering if it’s time to replace your hot water heater? Learn the key signs, benefits, and cost factors to help you decide on the best upgrade option.
A drain cleaning machine with a cable inserted into a drain opening set in concrete.
August 4, 2025
Protect your home from plumbing problems and mold with expert drain cleaning—a smart way to prevent clogs, odors, and costly repairs.
Air conditioning unit outside a building with a brown deck and stairs.
July 7, 2025
A new AC unit is more than just a purchase; it's a multifaceted investment in your home's future. Keep reading to learn more!
Air conditioner unit on a bed of rocks next to a house.
June 6, 2025
If you’ve noticed any combination of these warning signs, it may be time to consider a new AC unit. Keep reading to learn more!
Person in gloves replacing an air filter in a furnace.
March 5, 2025
For your HVAC unit to last for years, you need to take good care of it. From air conditioning services to cleaning air filters, here are some tips to help you!
Outdoor air conditioning units lined up outside a brick building with windows.
February 3, 2025
When you're looking for air conditioning experts, it's important to ask them the right questions. Here are 10 great questions to ask before hiring.
Man in plaid shirt repairing a white water heater with a screwdriver, indoors.
January 20, 2025
Are you wondering why you should never attempt a DIY HVAC installation? Read the blog or contact our team to learn more!
Mobile generator on trailer, parked next to gray wall with electrical box and power cables.
December 2, 2024
Looking to install a generator in your home? Check out how generators can be used to make your home and family safer in times of need!
Show More

Frequently Asked Questions

  • How do I know when it’s time to replace my water heater?

    We look for warning signs such as inconsistent water temperature, leaks, strange noises, or water discoloration. Older units that require frequent repairs may also indicate it’s time for a replacement. By assessing the condition, age, and efficiency of your current system, we help homeowners choose the best solution. Our approach ensures your home maintains reliable hot water while avoiding unexpected downtime.

  • What are the advantages of installing a tankless water heater?

    Tankless water heaters provide hot water on demand, meaning you never run out during showers or household tasks. They take up less space than traditional tanks and are typically more energy-efficient, which can reduce monthly utility bills. We guide homeowners in selecting a unit that fits their household needs and lifestyle while offering long-term savings and dependable performance with water heaters in Knoxville, TN. Many homeowners also appreciate that tankless systems can last longer than traditional water heaters when properly maintained.

  • How long does a typical water heater installation take?

    Installation time depends on the type of unit and your home’s plumbing setup, but our experienced technicians complete most water heater installations efficiently and with minimal disruption. We carefully handle all plumbing and electrical connections, ensuring that your new system functions safely and reliably. Our process is designed to give homeowners peace of mind that their water heaters in Knoxville, TN will work properly from the moment they’re installed.

  • Do you repair all types of water heaters?

    Yes. We repair tank, tankless, and hybrid water heaters for homeowners across the Knoxville area. Our team is trained to quickly diagnose issues such as faulty heating elements, thermostats, valves, and leaks. By addressing the problem efficiently, we restore hot water as quickly as possible. Our repair services help extend the life of your existing water heaters in Knoxville, TN and prevent more costly replacements down the road.

  • Can you help me choose the right water heater for my home?

    Absolutely. We evaluate factors such as household size, daily water usage, energy efficiency preferences, and available installation space. Based on this assessment, we recommend solutions that provide reliable performance and long-term value. Our goal is to help homeowners select a water heating system that meets their lifestyle and ensures comfort throughout the home. Choosing the right system is one of the most important steps when upgrading water heaters in Knoxville, TN.

  • What maintenance is required to keep a water heater operating efficiently?

    Regular maintenance helps prevent unexpected breakdowns and extends the life of your water heater. We recommend flushing the tank to remove sediment, inspecting valves and connections, and checking critical components for wear. Scheduled maintenance also allows us to catch small issues before they become larger problems. Our proactive approach ensures your water heating system continues to operate safely and efficiently for years to come.

  • Are tankless water heaters more expensive to install than traditional tank units?

    Tankless units typically have a higher initial cost due to advanced technology and specialized installation requirements. However, they often deliver long-term savings through energy efficiency and reduced water waste. We help homeowners weigh the upfront investment against long-term benefits, so you can make an informed choice. Properly installed tankless systems provide ongoing value and comfort while complementing your home’s energy needs.

  • What should I do if my water heater suddenly stops working?

    We provide prompt repair services to get your system back online as quickly as possible. Our technicians diagnose the problem, whether it’s a heating element, leak, valve issue, or other malfunction, and restore your hot water efficiently. With Coleman Care Agreements, customers also benefit from no trip charges, making emergency repairs easier to handle. We prioritize fast, reliable service so your home remains comfortable even during unexpected water heater issues.

  • Can I switch from a traditional tank water heater to a tankless system?

    Yes, we can help homeowners transition from a traditional tank to a tankless water heater. This switch involves assessing your home’s plumbing and electrical setup to ensure compatibility with the new system. We carefully handle installation, including any necessary upgrades, so the new unit delivers hot water efficiently and safely. Our goal is to make the transition smooth and minimize any disruption to your daily routine.

  • What size water heater do I need for my household?

    Choosing the right size water heater depends on your family’s water usage, the number of bathrooms, and appliances like dishwashers or washing machines. We evaluate your household needs and recommend a system that provides adequate hot water without wasting energy. By selecting the correct size, you’ll enjoy consistent water temperature and improved efficiency, avoiding common problems such as running out of hot water during peak usage times.

  • How can I extend the life of my water heater?

    Regular maintenance is the key to extending the life of your water heater. We advise flushing the tank periodically to remove sediment, checking valves and connections, and inspecting components for signs of wear. Avoiding corrosive cleaners or harsh chemicals can also prevent damage. Additionally, having professionals perform routine inspections and minor repairs helps maintain optimal performance and efficiency. By staying proactive, you can maximize your investment and enjoy reliable hot water for many years.