Heating Help Forumshttp://www.heatinghelp.com/Forumen-ushttp://blogs.law.harvard.edu/tech/rssActiva FrameworkRE: THE MAIN: Tom: Not detailed orientedhttp://www.heatinghelp.com/forum-thread/151055/Rinnai-E50C#p1339683Snowmelt is right, I looked at the Navien but never noticed the down fire ratings. It's a possibility. Now it's price and if it will run on the current gas ...Wed, 23 Jul 2014 05:50:22 -0400RE: THE MAIN: SWEI: Do we have a chart or a tablehttp://www.heatinghelp.com/forum-thread/151055/Rinnai-E50C#p1339682showing thermal effeicency of the Navien at various firing rates and RWTs?  I'm still curious about this, and it bears directly on the system at hand.Wed, 23 Jul 2014 00:51:47 -0400RE: THE MAIN: bob: Golden sectionhttp://www.heatinghelp.com/forum-thread/151056/Just-wondering-about-oil-tanks#p1339681The golden section / ratio is 1.618 to 1 or rounded 1.62 . The proportions of the end view of the 275 gal oil tank are 44/27 or 1.62 to ...Wed, 23 Jul 2014 00:42:29 -0400RE: THE MAIN: Snowmelt: Whathttp://www.heatinghelp.com/forum-thread/151056/Just-wondering-about-oil-tanks#p1339680About Roth oil tanks now that we're on the subject, who here took the Roth training course ( about 2 hours)Tue, 22 Jul 2014 23:15:03 -0400RE: Domestic: hot rod: determinehttp://www.heatinghelp.com/forum-thread/151062/Replacing-electric-water-heater#p1339679how much DHW your family actually uses. Also if you have a dump load like a bathtub, a 40 or 50 electric may not catch up quick enough for your ...Tue, 22 Jul 2014 22:40:46 -0400RE: Solar: hot rod: finished lookhttp://www.heatinghelp.com/forum-thread/151042/drainback-tank-ideas#p1339678Turns out 11" IP pipe insulation has a 12" ID. Circles for the ends cut from sheet fiberglass stock, bubble foil covers for that NASCAR look. Aluminum saddle to protect ...Tue, 22 Jul 2014 22:06:24 -0400RE: THE MAIN: Snowmelt: Thankshttp://www.heatinghelp.com/forum-thread/151055/Rinnai-E50C#p1339677HDE, thanks for pointing things out, I don't know why Tom thinks it will short cycle, are they just looking at the 160,000 btu like everyone else. It's a heating ...Tue, 22 Jul 2014 22:04:22 -0400RE: THE MAIN: HDE: Not reallyhttp://www.heatinghelp.com/forum-thread/151055/Rinnai-E50C#p1339676Navien's low fire on the small NCB combi is 13,000 BTU's and the Rinnai's Q50 is 13,600. They are essentially the same. I know the Navien 150,000 can be dialed ...Tue, 22 Jul 2014 21:21:52 -0400RE: A-C: Techman: No formulahttp://www.heatinghelp.com/forum-thread/151044/FREE-FREE-NO-CHARGE-Schrader-Tee#p1339675how is this? I guess this is a figment of my imagination. Come on ,now your reaching for straws .Tue, 22 Jul 2014 20:57:22 -0400RE: A-C: Techman: No FORMULAhttp://www.heatinghelp.com/forum-thread/151044/FREE-FREE-NO-CHARGE-Schrader-Tee#p1339674Hows this.Tue, 22 Jul 2014 20:49:08 -0400RE: THE MAIN: jonny88: thanks guys for your infohttp://www.heatinghelp.com/forum-thread/151054/How-to-loop-2-cast-iron-rads#p1339673i am actually going to install a manifold and run a homerun to each rad. Thanks for the advice.Tue, 22 Jul 2014 20:49:05 -0400RE: A-C: Techman: NO CHART?FORMULA? for SC?http://www.heatinghelp.com/forum-thread/151044/FREE-FREE-NO-CHARGE-Schrader-Tee#p1339672Read this and tell me again!Tue, 22 Jul 2014 20:32:33 -0400RE: A-C: Spence: More Freehttp://www.heatinghelp.com/forum-thread/151044/FREE-FREE-NO-CHARGE-Schrader-Tee#p1339671There is no formula for sub cooling. Again, it is the difference between condensing pressure converted to temperature and the actual liquid line temperature. If you have 6 and the ...Tue, 22 Jul 2014 19:41:37 -0400RE: THE MAIN: Ironman: Primary Loophttp://www.heatinghelp.com/forum-thread/150746/Suggestions-wanted#p1339670I would connect the house piping to form a primary loop and then use two sets of closely spaced Tees to inject into it. Moving from return to supply, the ...Tue, 22 Jul 2014 19:21:00 -0400RE: THE MAIN: SWEI: 275 and 330http://www.heatinghelp.com/forum-thread/151056/Just-wondering-about-oil-tanks#p1339669are both divisible by 55.  Think barrels.  Note these are also the standard sizes of IBCs.Tue, 22 Jul 2014 18:54:27 -0400RE: Radiant: SWEI: Thrrmal mass helpshttp://www.heatinghelp.com/forum-thread/151051/Radiant-Heat-Matrix-Other-Than-Concrete#p1339668Dark blue or black barrels along the south wall and perhaps the north wall depending on layout.  Fill with water.  Let the sun do its thing.Tue, 22 Jul 2014 18:33:22 -0400RE: Domestic: SWEI: Fuel options?http://www.heatinghelp.com/forum-thread/151062/Replacing-electric-water-heater#p1339667I'm assuming there's no natural gas in the area, but just in case... LPG prices vis-a-vis electricity vary widely.  http://www.eia.gov/tools/faqs/heatcalc.xls will help you make a reasonable comparison. If you are ...Tue, 22 Jul 2014 18:21:55 -0400RE: A-C: Techman: FREEhttp://www.heatinghelp.com/forum-thread/151044/FREE-FREE-NO-CHARGE-Schrader-Tee#p1339666I agree about measuring the 12* SC at the cond unit, and using the Saturated Temp and then mathing out the #'s to check for the nameplate SC#'s.But what about systems ...Tue, 22 Jul 2014 17:42:09 -0400NEW: THE MAIN: hot rod: this tool, why didn't Ihttp://www.heatinghelp.com/forum-thread/151064/this-tool-why-didnt-I#p1339665think of this? A plumber in Ohio did. A stepped tube that fits a variety of pipe sizes. The pieces are all nice quality, I used a lazy hand "tell ...Tue, 22 Jul 2014 17:40:57 -0400RE: Radiant: jumper: technique can matter toohttp://www.heatinghelp.com/forum-thread/151052/thread-sealant#p1339664especially with cheater threadTue, 22 Jul 2014 17:32:05 -0400