Joined on August 11, 2008
Last Post on September 1, 2014
@ March 21, 2014 1:21 PM in Please critique this designThat strategy falls into the "Six of one...Half-a Dozen of another" category. Based on the definition of a BTU, it should take the same amount of time to heat the water to a certain temperature, whether you are alternating zones, or feeding the home as a whole. I'll stop beating a dead horse about the whole system. I didn't reallize you only wanted to talk about control and stop-gap measures. Best Wishes
@ March 21, 2014 9:58 AM in Please critique this designYou are not going to get what you want at design day(or lower) temperatures, with the emitters you have.
@ March 20, 2014 4:11 PM in Please critique this designWould be best spent making sure you could heat the house with 130* water on design day. The output of the baseboards falls off significantly at that temperature. You need to make sure you have enough emitter in each room. I'd use the TRVs in sleeping areas, and let the ODR do it's thing handling the bulk of the home.
@ March 20, 2014 12:07 PM in Please critique this designI'm just not sure what type of windows you have to use to allow space travel.
@ March 18, 2014 10:47 PM in Please critique this designwell do the emitters match the heat loss, room by room?
@ March 18, 2014 10:36 AM in Please critique this designGot mixed up with your shoulder season example. It's an age thing, I guess.
@ March 18, 2014 10:32 AM in Please critique this designThe setting for the mixing valve for domestic is different at different temps. How do you ensure no one gets scalded?
@ March 18, 2014 10:26 AM in Please critique this design"Design day heat load 40k BTU/hr"
You say you have 24k btus of emitters?
@ March 18, 2014 10:19 AM in Please critique this designOnce the DHW is satisfied, it will then switch to heat if there is a call. But according to your drawing, it will continue sending hot water through the indirect.
@ March 18, 2014 9:32 AM in Please critique this designWhat happens when the DHW is at 140*, and there is a call for heat?
@ March 17, 2014 1:39 PM in NG Combi Boiler versus indirect tank and boiler setupIsn't this the person that argues so adamantly for Navien? And those arguments were after not even going through a heating season? This winter has tested the best heating systems. How did it fair HomeOwner1?
@ March 17, 2014 1:28 PM in Single (really!) pipe steamIf they're willing to pay for the time and materials to make the system right...why not. Discuss it with them. If they want someone to just stick another boiler in there....pass.
@ March 16, 2014 8:25 PM in Thought some of you might enjoy thisWhen I redid the upstairs bathroom, I broke the 1920's cast iron tub in half. My son and his buddies lugged the 300 lb halves down the stairs, with a lot of grunts and groans. When I told my father, he laughed, and said," I lugged those up the stairs, whole, by myself ".
@ March 11, 2014 10:43 PM in need some advice on how to size a new heating system in a remodelhttp://pvsullivan.com/Downloads.html
@ March 11, 2014 9:13 PM in Mono Flow IssuesCan you get some pictures of the near-boiler piping. Try to stand back far enough to get it all in. If you're getting steam, you have air trapped in the boiler.
@ March 9, 2014 11:12 AM in Pumping away ? I must have something messed up! HelpThat pump will add pressure based on its curve, not maximum. You are probably
destroying that pump, which then brings us back to expansion capacity.
@ March 9, 2014 9:46 AM in Pumping away ? I must have something messed up! HelpIs this climbing to 30 psi, a slow process? Is the whole system coming up to temp when this climbing starts?
@ March 8, 2014 5:41 PM in Pumping away ? I must have something messed up! HelpI was refering to the things that had already been touched on in others posts.Beyond design considerations, look at the I&O manual, and see how much you varied. They call for the primary circ to pump at the boiler for a reason. It prevents it from cavitating. Is that expansion tank mounted hanging off the side of the pipe, unsupported? Is there any provisions for power purging those loops?
@ March 8, 2014 4:43 PM in Sizing a boiler in Watertown, MAhttp://www.comfort-calc.net/Dont_Oversize_Mod_Con_Boiler.html