Whole house gas tankless water heaters apply the same principle to heat water as standard gas water heaters, but without a storage tank.
The tankless gas heats water as it flows through the tubing in the heat exchanger inside the heater.

When you open a faucet or turn on the shower, instant command for hot water tap is turned on in the home, cold water is drawn into the water heater, a sensor detects water flow and activates the gas burner which warms and heats up the heat exchanger, hot water is instantly brought in within seconds…and keep on flowing continuously.
That incoming cold water encircles the heat exchanger and leaves the heater at its set-point temperature, combustion gases safely exit through a dedicated, sealed vent system.

With traditional tank type water heaters, you have hot water until the hot water tank’s supply is depleted, then you must wait for the storage tank of cold water to re-heat before you again have hot water.
But with a tankless hot water heater, the time it takes for hot water to arrive at the tap is done immediately, a real on-demand switch command : as soon as the faucet is turned on, hot water is delivered : instantly, efficiently, and continuously … until you turn off the faucet.
The best thing about the hot water that comes from a tankless model is that you will receive an endless supply of hot water for as long as the faucet is being turned on.

Selecting The GAS SIZE Tankless Water Heater that BEST SUITS your needs
Interested in converting your home water heating to natural gas tankless ?
This quick chart below will help you select The perfect Gas Size Tankless Water Heater that best suits your needs.

ALL of these tankless units are WHOLE House HIGH Performance Efficiency (Diswasher, Washer Machine and Kitchen Sinks are included on top of the number of Showers/Baths in the Whole House Concept)

Some are Battery Operated (Save on electric bills! Also, if the power goes off, you will still have hot water running, 2 D Cell Batteries, they can last up to a year, average 6 months)
If you don’t want to deal with batteries, we also have Plugins , the gas units listed here will only work on 110V (not 220V or 240V)
On a separate note, our Electric Tankless Units work on 220V or 240V (sorry not Electric Unit available in 110V except ECO 70, ECO 40 and the Power Pak that works on both)

Best Of All, we also now carry the multi-functionality tankless water heater units that work on both (Battery Powered Ignition or Electric Plug-In as Alternative Power Source), also, they can be used either Indoors or Outdoors… no wonder these units are some of our Bestsellers!
We have them all, your choice!

Only Indoors units require venting.
Venting Kits and Parts can be purchased under Parts & Accessories.

Outdoor Units need a Rain/Wind Cap that will protect the chimney against the elements such as debris like leaves, twigs, branches, embers, sparks, water from rain, ice, snow…and even small animals like birds and small mammals…
Your Outdoor Tankless Unit will come with a FREE Stainless Steel Rain/Wind Cap … yes, providing here at no extra cost!

GAS TANKLESS Water Heaters TECHNICAL SPECIFICATIONS
To find out more about the technical specifications on any tankless unit, please click on the grid of the selected unit below