From: "Aidan" 
Newsgroups: alt.home.repair misc.consumers.house alt.architecture uk.d-i-y pdaxs.services.plumbing
Subject: Re: Expansion tank
Date: 12 Dec 2005 02:44:35 -0800
   posting-account=EFXN-A0AAACUt2TSeODJr4HRB9jK0-mA


kennybs@adelphia.net wrote:
> Hey uneducated asshole #2 check out the following link. Residentual
> baseboard output rated at "water temp" of 220 degrees. How could that
> be?

220 degF = 104 degC.

Either a pressurized hot water system operating at a pressure above
about 3 psi gauge, or a steam system using superheated steam which has
about 8 degF of superheat.

What I find utterly mind-boggling about the link is that anyone would
consider operating a modern  domestic heating system at more than 212
degF (100 degC) or, for that matter at more than  175 degF (80 degC).
Instant burns if you touch any part of it and no concept of thermal
efficiency. Haven't you heard of condensing boilers?