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 Our complete selection of Marey on instant on demand tankless hot water heaters are listed here. Marey has been supplying tankless water heaters since 1955. We here at Hot Water Instantly are dedicated to offering a great low price, guaranteed. A best in the industry product warranty comes with every product listed.

   Our hot water heaters are available in Natural gas and LP ( Propane )Gas and Electric and even portable LP Gas for campers.

                                          Estimated savings

                    Electric  Monthly  $30 - $50      Gas Monthly $50 - $70

                   Electric Yearly $300 - $600        Gas Yearly  $600 - $840

Every product listed has a Click here button that opens a PDF file that has the units complete description including the installation guide and warranty information. The installation guide comes with the unit and will walk you step by step for installing the unit.

In todays economy who can afford to keep water hot 24-7? These tankless hot water heaters only heat the water as it is being used. They supply endless unlimited hot water. Take a small business or Church where days might go by without using hot water. The water is hot and the electric meter is running but it's not being used. 20% of the utility bill is from heating water and these heaters save 60% of that. These on demand tankless hot water heaters provide these assets.

* Allows customer to regulate energy consumption, adapting the product to the homes electric capacity; Models include, Gas water heaters, electric water heaters and a portable water heater.
* Saves water, electricity and space significantly. Easy management and simple adjustments; No hot water tank to take up room. An in line water heater and under sink water heater is out of the way.
* Filter on inlet to avoid sediments from damaging the unit; The water heater element is stainless steel, built to last.
* Excellent post sales service and warranty;
To determine the size of the on demand tankless hot water heater you need, you'll have to calculate how much hot water you'll need at one time, which is called the flow rate. The flow rate is measured in gallons per minute ( GPM ). The table below provides typical flow rates for typical household hot water applications.These are averages.
Bathroom Faucet 0.5 - 1.5 GPM
Low Flow Kitchen Faucet 1.2 - 1.7 GPM
High Flow Kitchen Faucet 3.0 - 5.0 GPM
Shower 1.0 - 2.0
Dishwasher 1.0 - 2.5 GPM
Clothes Washer 1.5 - 3.0 GPM
More sizing information is displayed on the FAQ's page.











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