looks like I missed that back in o8...
but their was never actually a link to the report
perhaps I thought it was just a rant by nymaster..??
Lot of rants here that I try to avoid...and not read .....
the report is not going to make any difference anyhow...
because once you go green,,,,
cold hard facts dont matter..
Speakin' of not letting the facts confuse...
To you have any evidence that fuel/carbon savings is anything like a primary driver of tankless sales? (I've not seen any, but maybe it exists.) It may be a primary reason for various subsidies, but there's great debate amongst regulator wonks as to whether the subsidy is appropriate for the (lack of anticipated) fuel savings.
You seem convinced that a primary motive of tankless buyers is some green-factor, whereas in my informal completely non-scientific sampling the primary reason people actually buy 'em is to go hog wild with hot water use, filling gia-NORMOUS soaking tubs & spas, etc., which is kinda the opposite of "green", eh? Continuous uninterrupted DHW flow capability makes tankless heaters a water and fuel waste enabling technology (and as every tankless owner who is also the parent of a teenager knows, it achieves that end very well! )
But don't let those facts confuse you, eh? ;-) Go ahead and keep chalkin' it up to stupid greenies who can't do math or somethin'... (Or dig up the data to support that perception, 'cuz I just don't see it.)
The cold hard FACTS are, it takes a heluva tank (or multiple tanks) to fill multiple monster tubs in the McMansion, but one tankless will do, and the people who buyin' 'em know that (whether they know/care about the relative efficiency aspects or not.) And the peops in the tiny townhouses know they can buy some precious floor space back with a tankless, mounting it on the wall over the washer, etc. Those two reasons cover the vast majority of the residential tankless installations I've seen.
The only installation I personally know of where fuel economy was a primary motivator was commercial, not residential, and also made sense given the required flow & volume and again. Green had nothing to do with it, even if it was arguably greener than their prior solution: Keeping a high mass oil fired boiler hot just to make hot water on an intermittent basis had atrocious standby cost. (It would have taken a heluva tank to handle that too.)
I challenge your presumption- show me some facts!