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Eli: Roughly how long does it take to heat your cistern to 55F; in galllons per hour?<BR>Carmine<BR>From: elitalking@rockbridge.net<BR>To: greenbuilding@lists.bioenergylists.org; colsen@fairpoint.net<BR>Date: Sat, 12 Feb 2011 09:46:05 -0500<BR>Subject: Re: [Greenbuilding] Max Temp Storage Water Heaters+TemperatureSensors<BR>I have lived with a cistern for 25 years. There are definitely issues. Collecting melting snow is one. However, once it melts and drains into the tank that is in the ground, it is heated up to ground temperature. If you bring that water into the house in an un-insulated tank, it would be heated up to room temperature, cooling down the house in the process. Then boosting the temp instantaneously becomes more efficient. This is tank of water is another source of thermal mass. Although when consumed is another heat load for house heating system. In the summer, it is a slight benefit for cooling the house. <BR><BR>Eli <BR>----- Original Message ----- <BR><BR>From: Carmine Vasile <BR>To: GB Forum ; Clarke Olsen <BR>Sent: Friday, February 11, 2011 7:44 AM<BR>Subject: Re: [Greenbuilding] Max Temp Storage Water Heaters+TemperatureSensors<BR><BR>Clark: Not in NYC when their reservoirs fill with snow melt in the springtime and tap water approaches 35F. That's when a 2.25 gpm shower @ 105F needs a 70F rise; requiring about 70/3 = 23kW; a 50 amp heater yields about 12kW worth of hot water. Carmine<BR> </body>
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