Our Team Is United for Your Comfort

Rheem Water Heater Calgary

Rheem Marathon: Where Lifetime Warranty Meets Leak-Free Assurance. Experience the peace of mind with a lifetime tank warranty, guaranteed leak-free performance, and a durable titanium body element. It’s the water heater that keeps on giving.

We carry Rheem 40 Gallon, 50 Gallon, 75 Gallon Water Heaters Ready to Install



Lifetime Tank Warranty

  • Tank is built to last for as long as the customer owns their homeRheem Marathon Water Heater
  • Eliminates call backs due to durability issues
  • The last water heater homeowners will buy for their home—eliminating the cost of reinstalling a water heater every ten years (national average)
  • FREE warranty upgrade from 10 years to Lifetime if customer registers online
  • Proven design since 1989
  • Unmatched strength, toughness, and durability

Non-Metallic Tank

  • Seamless, blow-molded polybutene inner tank will not rust or corrode
  • Outer tank resists dents, scratches, and salt air
  • Offers the best durability, withstands the harshest environments, and eliminates smelly water due to chemical reactions with sulfates

High Efficiency

  • Two-and-a-half inches of polyurethane foam insulation minimizes stand-by heat loss allowing only -15°C loss in 24 hours – saves money on the homeowner’s energy bill
  • Cost-to-own becomes more important to customers as energy costs rise

Cost Breakdown for Electric Water Heater Installation

  • Size of Tank: The size of the water heater tank you choose will impact the installation cost. Larger tanks may require more labor and materials.

  • Electrical Work: Wiring to a new circuit or existing circuit, along with a breaker if required.

  • Electrical Permits by the City: Most municipalities require electrical permits for water heater installations. Be sure to check with your local authorities for the cost of obtaining these permits.

  • Disconnecting Old Gas Water Heater: If you’re replacing a gas water heater with an electric one, you’ll need to disconnect the old gas unit. This may involve shutting off the gas supply and safely disconnecting the old unit.

  • Disconnecting All Ventings: If your old water heater had venting or exhaust systems, you’ll need to disconnect and remove them as part of the installation process.

  • Installation: The actual installation of the new electric water heater, including connecting it to your home’s electrical system and plumbing, will contribute to the overall cost.

  • Extended Labour Warranty: Comfort Union’s labor warranty of $5.95/month, when combined with annual maintenance of the heating system, covers annual flushing of the tank and tune-up. In case of any component or tank issues, we deal with the manufacturer.

  • Average Cost: For a 40-gallon unit, Comfort Union’s installation starts at $2,790, which includes the tank, installation and all other materials.

The total cost of installing an electric water heater will depend on the factors mentioned above and may vary based on your location and specific requirements.

Our Promise to You!

At Comfort Union, we realize you have plenty of choices when it comes to contractors to handle your residential or commercial heating, cooling, plumbing and electrical services. However, we believe we’re the right choice, the smart choice and the best choice.

Why? Actually, there are so many reasons.

  • Unbeatable Lifetime Tank Warranty: Comfort Union™ x Rheem®: With our yearly maintenance plan, enjoy 100% coverage for an unparalleled 8 years on parts and lifetime warranty on the tank. It’s our promise of long-lasting quality and your assurance of a worry-free experience.
  • Homeowners’ First Choice: Discover first-hand why we’re Calgary’s leading choice in HVAC, Plumbing and electrical services. Our unparalleled customer care and quality products make us the brand homeowners trust most.
  • The LAST Water Heater You’ll Ever Buy!: Invest in home comfort like never before with our Lifetime Tank Replacement guarantee. As long as you own your home, you’ll never need to worry about buying another unit.
  • Membership That Pays You Back: 
    Free tune-ups and discounts seems unreal? Instead of spending on ads, we prioritize top-notch service for members. Your referrals speak volumes, and in thanks, we reward you with free annual membership.
  • Service From Our Heart to Your Home: 
    This isn’t just a job for us; it’s a calling. Rooted in a genuine passion for home comfort, our team sees this work as more than a career it’s a legacy. We approach every job with empathy and the heartfelt desire to make your home a better place.
  • Always Available, Whenever You Need Us: 
    Whether it’s for a second opinion, emergency system breakdown, expert advice, or even career guidance in the industry, we’re just a call away. Because we’re more than a service provider we’re your reliable partner in all things home comfort

We Guarantee You Won’t Regret It!

At Comfort Union, we realize you have plenty of choices when it comes to contractors to handle your residential or commercial heating, cooling, plumbing and electrical services, residential indoor air quality services and commercial refrigeration services. However, we believe we’re the right choice, the smart choice and the best choice. Why? Actually, there are so many reasons. For starters, we offer five incredible promises to you, which we call our Comfortable Future® Guarantees:
  • We’re committed to your 100% satisfaction.
  • You’ll enjoy top warranty protection.
  • We’ll never insult your intelligence. Instead, we insist on no high-pressure sales tactics.
  • We offer upfront pricing. We never charge by the hour, always by the job.
  • We will provide you with a free second opinion if you’re not sure if you need a certain product or service.
 Our guarantees are only the beginning:
  • We’re here to stay. We have deep roots in the Calgary community and plan to be around for our customers not just now, but for years to come.
  • We provide residential and commercial heating, cooling, plumbing and electrical services as well as residential indoor air quality and commercial refrigeration services—all under one roof. That makes us the convenient choice. Save yourself the hassle of shopping around!
  • Our HVAC technicians, plumbers and electricians are licensed, insured, well trained and highly experienced. Plus, we’re fortunate to have members of our team with engineering backgrounds—a huge help with installations and more!
  • We carry a wide selection of superior products from highly respected manufacturers.
  • We’re great communicators. We will answer the phone when you call, show up when we say we will and always keep you in the loop.
There are so many other reasons to choose Comfort Union. But we don’t want you to take our word for it. Instead, check out what our customers have to say about working with Comfort Union.

Book Online


5.0 / 5

“My family friends needed a plumber for a leaking hot water tank that needed to be replaced ASAP, and Comfort Union sent out a technician the same day I called. Thank you for the last-minute help. We went with rheem marathon electric water tank because of the impressive lifetime tank warranty.”

-Anmol S. Google Review

Best Water Heater Replacement in Calgary

Licensed-Insued icon

Rheem® Pro Installer

We're registered pro installers for top brands like Rheem, Bradford White, Rinnai, and Noritz. Our licensed technicians provide expert water heater repairs.

Furnace Repair Calgary

Repair or Replace?

We assess your system's condition, efficiency, and age, offering tailored advice for optimal comfort and cost-effectiveness. Trust us for honest solutions that meet your specific needs.

24/7 Heating & Furnace Services in Calgary

Same-Day and Emergency Repair Services

Whether it's a late-night breakdown or a sudden malfunction on a chilly morning, our same-day service commitment means that help is always just a call away, our team is on standby 24/7.

We Service All Brands and Model

At Comfort Union, we offer a range of water heater options to suit your needs. We install all major brands. Choose the reliability and efficiency of a Bradford White Gas Water Heater for consistent hot water supply. Opt for the Rheem Electric Water Heater with a Lifetime Tank Warranty for peace of mind and long-lasting performance. If you’re looking for energy savings and endless hot water, our Tankless Water Heater is an excellent choice, backed by a 25-Year Warranty. Whatever your preference, we have the perfect water heater solution for your home.


Benefits of Working with Us


20+ Years of Service

Veteran Industry Experience

appointment icon

Same-day Appointments

Available for Prompt Service

Insured icon

Affordable & Honest

Cost-Effective Transparency

clock icon

Your 24/7 Comfort Partner

Always-On Support

experience icon

WholeHearted Service

Empathetic, Comprehensive Care

Promotions & Financing Options


$75 OFF With Old Trade-In

Get $75 OFF when you upgrade to Rheem® Marathon

Cannot be combined with other offers and must be mentioned when a service is scheduled. Subject to change any time.
comfort union team repairing

$20 Off Service Call

Take off $20 of any service call

Cannot be combined with other offers and must be mentioned when a service is scheduled. Subject to change any time

comfort union van

$149 Annual Membership & Tune-up

Membership includes free annul tune-up and no service call fees.

Cannot be combined with other offers and must be mentioned when a service is scheduled. Subject to change any time.

Service Areas








East Village






Crescent Hill


Silver Springs


East Village



Expert Plumbing & HVAC Services

Expert Plumbing & HVAC Services
Call: 403-399-7903

Serving with a Smile