Actually, the demand water heater is getting quite a following in the USA. Go to Google or other search engine and type in "demand water heater" and browse through the results.
Carleton -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of MightyChimp Sent: Saturday, May 22, 2004 20:44 To: U.S. Metric Association Subject: [USMA:29914] Re: kWh for gas Maybe so, but American furnaces don't. American furnaces just heat the air and a fan blows it through the house. No radiators or boilers, at least in newer homes. People who have had radiator heat say it is too hot. Also, the US has not caught on to the more efficient demand water heating system. Water is heated in a big tank and stored until usage. As the water cools, it has to be re-heated, which means a waste of energy. Because the demand heater system is considered "foreign" it isn't even considered in the US. I don't even think one can be brought to the US from Europe and even if you got it in, you could not connect it as it would definitely not have US approvals. Anything that saves energy and cuts into energy profits is un-patriotic and un-American. Euric ----- Original Message ----- From: "Chris KEENAN" <[EMAIL PROTECTED]> To: "U.S. Metric Association" <[EMAIL PROTECTED]> Sent: Saturday, 2004-05-22 10:57 Subject: [USMA:29907] Re: kWh for gas On Wednesday 19 May 2004 21:34, [EMAIL PROTECTED] wrote: > 2004 May 19 > RE 29846 > e-mail 29846 reports that gas is billed in kWh in the UK. > This is bad news. In the US kWh is restricted to electricity only. When it was changed from therms a few years ago they deliberately chose kWh to make comparisons easy with electricity prices. Not good SI, but I understand the rationale. .. > Note that gas energy is billed for its higher heating value. That is > the energy delivered if all the water vapor is condensed to get out > the heat of vaporization. Residential furnaces do not condense. Oh yes they do! Condensing boilers are sold in Europe as the most efficient way of heating. They become compulsory in the UK in a couple of years' time, I believe. -- Chris KEENAN UK Metric Assoc.: metric.org.uk
