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Gas-Fired Tankless Water Heaters

by Harry Webb
(Georgia, Atlanta, USA)

Water heaters are becoming such a necessity these days. For those who are into new houses that don’t have them yet, tankless water heatersare good buys because of savings, reliability, and overall ease of use. There are two choices for tankless water heaters: gas-fired or electricity-driven.

Whichever system you choose, the savings earned up and the return on investments on tankless water heaters are the same.

Venting requirements

First, there is need to identify which gas type have you got, natural gas or propane. You need to examine your current gas line to ensure meeting the requirements. (The requirements of your new gas-fired tankless water heater may exceed that of your present tank storage water heater.)

Be sure to buy Category III stainless steel venting for your gas-firedtankless water heater. Check the local building code to ensure that your specific needs are met.

Disregard venting “kits” from manufacturers. Make sure, however, to measure out your vent route, consider where the discharge will go through (a wall or a ceiling?), the necessary clearances, and the ample access to air for combustion.

Only then will you buy the right gas venting pieces.

Location, size and demand

Where will you need hot water? What unit do you need – one that heats a bathroom sink, an entire bathroom, and an entire house? How many fixtures need hot water? Which ones need larger amounts of water?

Flow rates are important because tankless water heaters will generate temperature rise based on the flow rate specified.

If you live in cold New York, your ambient incoming water is definitely colder than that of Florida.

Applications

There are several specific applications for your tankless water heater. Here are a few examples.

* Single point application is one where one fixture will require an electrictankless water heater.

* Flow controlled range of water heaters are suited to serve two points, like two sinks in close proximity.

* Thermostatic tankless water heater boosts the temperature lost in long pipe runs, dishwashers and sanitation. Good for applications where precise temperature control is essential.

* Series Two units are for residential showers, entire bathrooms, smaller houses, condos, and apartments.

* Whole house units are designed to serve an entire house, apartment, condos, etc. where multiple points of use exist. There are two models, Whole House Indoors and Whole House Outdoors.

Installation

Proper installation will depend on climate and local building code requirements. Do not scrimp and get yourself a qualified licensed plumbing and heating contractor to install your gas-fired tankless water heaters.

Click here to read more about energy efficient water heaters

Updated: January 31, 2013 — 12:52 am

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