Tankless Domestic Water Heaters

With over 3 decades of experience in servicing, repairing, replacing and installing tankless water heaters, ATWH has the know-how to fix your issues quickly and professionally. Let our team of experts service and repair your tankless unit today!

Tankless Services may Include:

  • Service & Repair of Tankless Units
  • Installation & Replacement of Tankless Units
  • Flushing of the water heater to remove sediment and calcium from the heat exchanger should be done annually
  • Cleaning of the inlet filters annually
  • Cleaning of the flame sensor every 3 years
  • Inspection of the T&P valve annually
  • Inspect and clean heat exchanger every 3 years
  • Inspection and cleaning of water heater venting annually
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Advantages of Tankless

  • Most units come with a Federal Tax rebate.
  • They never run out of hot water.
  • They last 3 times longer than tank models.
  • They're more efficient with no standby heat loss.
  • They take up less space.
  • They only need enough power to heat the amount of water necessary at any given moment.
  • Save up to 40% on your water heating bill.
  • No risk of flooding due to ruptured tank.
  • Local gas company rebate
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Save Money, Splurge On Performance

Texas Water Heaters

Designed for Efficiency

Rinnai’s tankless technology features Stainless Steel heat exchangers to provide maximum efficiency and uses up to 40 percent less energy than a traditional tank.

Texas Water Heaters

Save Energy

By operating only when hot water is needed, and no storage tank to heat and reheat water, our tankless technology helps save on energy and utility costs. The use of an electronic ignition means no standing pilot light that constantly uses energy.

Texas Water Heaters

Replace Parts, Not Systems

Every part of a Rinnai Tankless Water Heater is replaceable. Components can be easily exchanged, if needed, versus replacing the entire system.

Texas Water Heaters

A Smart Investment

Increase your home’s value with premium technology, increased energy efficiency, an improved Home Energy Rating System (HERS) Index Score and optimized LEED certification. Available energy efficiency rebates and tax credits offer the opportunity to help make your purchases more affordable.

Tankless Service, Repair & Installation

Gas hot water heaters are efficient and effective. You now have the choice of traditional or tankless hot water systems. We would like to provide you with some information to help in the decision making process of your new water heater system.

Tankless water heaters are compact heating units that provide hot water as it is needed, and do not store hot water like traditional tank-type water heaters. When a hot water tap is turned on, water enters the tankless water heater. A sensor detects the water flow, and activates an electric or gas heating device, which quickly raises the water temperature to a preset level.

Texas Water Heaters

Enjoy Up to 40% Energy Savings, Endless Hot Water, And Significant Space Savings.

Texas Water Heaters

Because tankless heaters do not store water, they are less subject to corrosion than tank-type heaters. As a result, their expected equipment life is possibly longer - more than 30 years, compared with 8 to 10 years for traditional heaters. Also, because they are not heating 40 to 50 gallons of water 24 hours a day, tankless water heaters are less susceptible to leakage than tank-type water heaters.

Save Space With a Compact Design

Maximum output, minimum space

About the size of a small suitcase at 18.5” x 26” x 10” or smaller, these wall-mounted models can be installed on interior or exterior walls and in compact spaces to free up valuable space.

Flexible installation

Small size allows for installation in non-traditional spaces such as crawl spaces and attics, making it perfect for use in any size home, including manufactured and modular homes.

Texas Water Heaters

Stay Green With A Sustainable Choice.

Texas Water Heaters

Earth-friendly efficiency: Our tankless technology achieves maximum energy efficiency, helping to conserve natural resources.

Less waste: Compact heat exchanger design, longer product lifespan up to twice as long as a traditional tank** and recyclable parts means less waste in landfills.

High standards for low emissions: Lower CO2 emissions contribute to cleaner air and a healthier environment.

Tankless Technology That Saves You Time.

Never think about your hot water needs again: Innovative technology provides an endless supply of hot water whenever and wherever it’s needed – even for simultaneous uses at multiple fixtures. Showers and baths? Absolutely. Laundry and dishes? No problem. Prioritizing activities and scheduling hot water use is a thing of the past.

Our team is ready to help you decide if a tankless water heater would be best for your application.

ATWH services and repairs all makes and models of tankless water heater systems.

We install industry leading tankless systems from Rinnai.

Texas Water Heaters

When water flow stops, the heating element shuts off. Thermostatically-controlled tankless water heaters vary their output temperature according to water flow rate and inlet water temperature.

Unlike traditional storage tank water heaters, tankless water heaters do not store a reservoir of hotwater. As a result, standby losses are reduced, which makes them an energy-efficient alternative to traditional water heating. When water flow is detected, they begin heating water, making them highly efficient and cost effective. When the demand for water ceases, they shut down and use virtually no energy.

There will always be hot water. Endless hot water - for bathing, cooking, dishes, laundry, and all the other countless ways hot water enriches our lives. Tankless water heaters consume a fraction of the space consumed by a tank heater. They can be mounted inside or outside.

Stay Green With A Sustainable Choice.

  • Texas Water Heaters

    Rinnai Value Series

    ENERGY STAR® Qualified
    Lightweight and Compact
    Natural Gas and Propane Models

  • Texas Water Heaters

    Rinnai Luxury Series

    Up to 9.4 GPM
    ENERGY STAR® Qualified
    Natural Gas and LP

  • Texas Water Heaters

    Rinnai Ultra Series

    Energy Factor of Up to .96
    Concentric Polypropylene or PVC Venting
    Natural Gas and Propane Models