SOS GrandPAH!

Leo G_99

I have noticed a trend up here in the Vancouver, of more and more advertising from from plumbing companies, and municipal governments, tellimg people to lower their DHWT temps to 120* to save energy, and help the CO2 problem. I have been slowly drafting a letter that I am going to send to the newspapers in my area, and the local muni's, about the danger of this. If you find the time could you please post or e-mail me some the links you have, so that I may include them in my letter?

Thanx a ton Dave.

Leo G

Dave Yates (GrandPAH)_1

CIPH

I thought CIPH had passed codes to raise storage temp to 140F along with a requirement to add a 1016/1017 certified scald-guard device at the outlet???

Addressing the issues: lowering from 140F to 120F saves little energy and increases the risks where bacterial amplification is concerned. The risks for scalding are slightly reduced, but 120F is not a safe temperature as third degree burns are still fairly quick (a few minutes of contact time, which varies widely depending on age and physical well being). It's not until you get to, or below, 110F that scald-burns are minimized. And that's why CIPH and our US codes need to take another step towards system-wide treatment by adequately protecting the three components: Point of Source; Distribution Network; and all Points of Use. Raise storage temps; add constant circ at 133F min; ASSE certified P&T scald-guard devices at all bathing modules, T at Points of Use where elderly and/or infants will be exposed and P permitted at all other Points of Use. Require the PI to test and approve outlet temps at all Points of Use, which would greatly reduce liability for all of us (manufacturers, distributors, installers, etc...).

CO2? I'd sure like to see the numbers behind that claim.

Lowering their storage temps will also impact their draw-down capacity. My formula for determining total capacity required will allow you to accurately tag any size water heater – both tank or tankless – required to meet demand. Remember it as: BiTe IT and SiT on IT. Adjusted Bathing Temp – coldest Inlet Temp divided by Storage Temp – coldest Inlet Temp = % of hot water in any given flow. Time the flow and capture the GPM in a bucket marked to measure gallons.

Here's some links:

http://www.contractormag.com/articles/column.cfm?columnid=193

http://www.contractormag.com/articles/column.cfm?columnid=162

http://www.contractormag.com/articles/column.cfm?columnid=168

http://www.contractormag.com/articles/column.cfm?columnid=98

http://www.contractormag.com/articles/column.cfm?columnid=356

Leo G_99

Thanx GrandPAH

Really appreciate it. I am not sure about CIPH, but in the end, it is the Canadian code comittee that has last say. As per the hot water tank as a heat source debacle. I thought that we had talked them into the use of a heat-x on combined systems, but at almost the last minute, that was rejected. ARRGGHHH!!!!

Leo G

Dave Yates (GrandPAH)_2

Well

You can lead a horse to water, but.......