Re: O/T-waterheater

Posted by jdemaris on November 18, 2006 at 18:54:37 from (66.218.15.2):

In Reply to: Re: O/T-waterheater posted by oldfarmtractor on November 18, 2006 at 12:41:54:

I've got no argument with some of the advantages of the tankless in certain applications. But - with some of what you've stated - I've experienced different. I've seen several fail - they don't run forever. My neighbor had a Aquastar that had a flow-valve fail the first year. Two years later, it happened again. They are, of course, repairable, - but parts are often NOT in stock at the local plumbing supply - as they are for conventional heaters. Waiting even a few days for parts - if it's the only source for hot water - is a long time.
You also mentioned ease of installation. I've installed several, electric and gas - and for "point of use" they are far from easy to install. Even the smallest electric units require 220 VAC 50 amp circuits. And the gas - usually a minimum of a 5/8" LP line or a 3/4 NG line along with venting - often power venting. That can be difficult for an interior room.
If a tankless is used as a stand-alone unit - then right away, it's "point-of-use" advantage is lost - and much heat is lost in long runs of pipe.
And, in the ability to heat water - it's all based on temperature rise. If you live somewhere that has very cold incoming water - like well water - it's capacity to produce hot water can be cut in half of it's advertised GPM ratings.
But again - for some applications they work great. But, in many others, they do not - and are often more costly in the end. I've know several people that had them, removed them, and went back to tank heaters and are glad they did.
I don't agree that they are, as you say, the "best thing for home since the introduction of the indoor toliet." They've been used in Europe for many years, and now are being marketed as a great new technology to U.S. consumers.

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