Joined on May 27, 2011
Last Post on March 7, 2014
@ March 7, 2014 7:19 AM in Heat loss through rim joistend of the joists is where we always make our crossovers . We also use a piece of aluminum to the bottom of subfloor at the outside and as far out on the straight pipe as possible half straps so tubing is in contact with aluminum. This is your area of GREATEST heat loss in any structure and having the tubing not in contact with the subfloor at this location is a bad idea , not having the insulation in contact with it is a worse idea . If the below tubing insulation were in contact with the tubing and subfloor this area would be someone elses responsibility . Figure out what will be more cost effective for you and perform the required task . Maybe removing that tubing and putting the crossovers on the other side is gonna be more economical than hiring a spray foam guy , and your heating system will perform better . At that point you can tell the homeowner to hire the spray foam guy himself as it should be . In either case as our site host always says , Pay your tuition .
@ March 6, 2014 11:30 PM in NG Combi Boiler versus indirect tank and boiler setupis it that you are replacing and what are your requirements ?
@ March 6, 2014 8:33 PM in tenant heat meteringIworx system can be part of the system also because nobody will just take your math at face value . You will also require a KNOWN Delta T . There are a few choices of circulator that will closely control Delta T . Taco VDT and Bumble Bee , also Wilo Stratos with IR option .
@ March 6, 2014 8:30 PM in High Duty baseboardof the disclaimer that "this includes a 15% heating effect factor " ,. this is a fictitious number that should be subtracted , making 600 per foot actually 510 per .
@ March 5, 2014 6:36 PM in Gas furnace v hydro-air in remodelHave used this configuration before in a much larger home than you are discussing , works great hooked up to 5 Coils and plenty of DHW too . You have the benefit of ODR and a wide range of modulation , by far the best combination I have ever used on a hybrid system . http://www.htproducts.com/phoenixairhandler.html
@ March 2, 2014 10:25 PM in New Home, Which heat source????up Cocoon Tanks . These are what you will need and I belive will become the preferred tank moving forward
@ February 28, 2014 11:33 PM in Cast Iron to Pex Zone and Pump and Meter questionare always a worthwhile investment . They keep things neat and organized , are not complicated and all in all inexpensive . Taco ZVC or the Argo you mention are fine .
@ February 27, 2014 6:29 PM in Cast Iron to Pex Zone and Pump and Meter questionProbably has the easiest and best flow control I have ever used . They are in the Mid west .
The plumbers in your area must not be trained very well or have a very small knowledge of anything that is not the norm . Radiators and TRVs will work just fine where you are . That being said you do not require them on your system . The zone valves and 1 bumble bee will work just fine , Does not matter where you are . Run them at a 30-40 Degree Delta T and let them suck every bit of energy they can from the fluid .
@ February 27, 2014 1:05 AM in pex systemmade me believe that you would also have Wirsbo Manifolds , possibly not however . If in fact they are Wirsbo manifolds to match the actuators the name now is Uponor . If this is the case the part numbers I provided are correct . If they are another manufacturers manifold , not so much . Yes , to replace those parts it would require those loops at least to be drained . If your manifolds have isolation valves it would be possible to just service that portion of the system assuming there are other manifolds in different locations .
@ February 26, 2014 11:08 PM in pex systemlike you may have a broken on/off valve body . If you have a Truflow brass manifold you quite probably need to replace this , the part number is A2620017 for the return and A2620013 for the supply . If you have an EP manifold ( plastic ) the pat number is A2670004 for the return and A2670005 for the supply and you will need the replacement tool ( A2670007 ) for the EP manifold . Do you have the proper actuator adaptor that was there installed also ?
@ February 26, 2014 10:12 PM in Rinnai RH180 or 100 Gallon Atmospheric?Check the Neighborhood for webinar on circulators and indirect tanks . Doesn't sound like what you want but it is . All the calcs you are looking for are in there .
@ February 26, 2014 9:56 PM in Cast Iron to Pex Zone and Pump and Meter questionIs the piping done to each radiator as a homerun ? If this is the case I would suggest one pump and 3 zone valves . I also suggest a variable speed Delta T pump . Sounds like you have generously sized manifolds and the piping to the rads is 3/4" so your head loss should be low , bing that these are radiators you can run a 30* Delta T and have really nice results , low head loss , low flow . Save your first cost money and save money every month and tell the pump fan to go away .
If you use the Delta T pump you really can live without the flow meters also
@ February 26, 2014 9:45 PM in pex sizepiping arrangement will you use ? Parallel , series loop ?
@ February 21, 2014 8:36 PM in Help!! staple-up insulation foil mythis R value . If R 19 has a paper , foil , encapsulated it is still R 19 . Ask your home inspector to go into a closet with no light and a mirror , then ask him what he sees . Bet he sees nothing because you can only reflect light and the last time I checked there was not much of that commodity within a ceiling , floor or wall cavity . Here are some letters for you if it helps . I'll send them in a PM because I think it's obnoxious
@ February 21, 2014 8:21 PM in Scott's radiant heating projectis taboo discussion here . Dos it sound like too much to you ? The right price is whatever you are willing to pay or whatever you are willing to perform some task for . That said , it's not a bad number in my market (NYC Metro) . HTP is a bit less expensive .
@ February 20, 2014 10:14 PM in Soundproofing a boiler roomSafe and sound insulation will provide fire protection also . You may also want to sheetrock below that using 1x lumber perpendicular to the framing , this will lessen the contact area between the surfaces and cut down on vibration which is where your sound transfer comes from .
@ February 20, 2014 9:23 PM in Scott's radiant heating projectCadet or HTP MC Series . Low bottom end modulation , both are inexpensive as far as wall hung mod cons go .
@ February 20, 2014 7:52 PM in how prevalent is this?as we have recently been educated about kills Legionella Harvey . Drink away , apparently it's OK . Had to say it guys , sorry !
@ February 20, 2014 12:49 AM in Looking for book recommendations!Buy the book , Hope you have plenty of time to read , it has grown substantially in it's latest incarnation. A real good scientific calculator is a good idea also .
Shame you talked to 2 guys that both don't have a clue . There are many panel rads out there and most have very detailed sizing and performance specs , you should easily be able to appropriately size each and every rooms emitters using these resources . My suggestion probably won't differ from John S's much , and that would be to use these panel rads with TRVs , constant circulation , home run piping from a manifold . This provides good room control , comfort that is stellar , same temp water to ALL radiators , wire to water efficiency , optimal boiler efficiency .
Would you mind telling me what type of boiler , heat source you would like to use ? Oversizing is never a good idea , in all actuality heat losses all have fudge in them already . If it were not for lawyers I would probably decrease my boilers by 10 - 15 % . Damn lawyers .
The 2 contractors you spoke with only had 1 intelligent idea . Buffer was that idea , except not in the form of oversizing because as everyone here can tell you that would be an anti buffer . What you will probably need (TBD) is a small buffer tank because loads can get pretty small at many periods using a Panel Rad TRV strategy .
@ February 18, 2014 6:07 PM in how prevalent is this?that you speak of Kenoryn usually utilize tried and true materials and methods and benefit from Sweat equity . They on average do not try to re invent but save money by doing it themselves .
MMM will soon find that the expansion tank he should have used was one meant for a potable water system , He will also find out that heat does not rise (lack of insulation ) nothing to show otherwise . His SUPER DUPER efficient condensing water heater will not condense nearly as much with 120* fluid entering it as it would with the manufacturer anticipated 55-60* water entering . He will go through pumps like a madman unless they are stainless or bronze . He will suffer from higher than normal air accumulation . Is that oxygen barrier tubing , not for use in potable systems ? He should really use poly propylene venting or at a minimum sch. 80 CPVC as we have now identified that PVC does not withstand the exhaust very well over about a decade . Internet companies that promote open systems usually end up defending those systems as is the case for the past several years , and you'll never see them out on a job site in jeopardy of being smacked upside the head , this is not by accident , a computer is easy to hide behind . Do you think the water in the radiant tubing will not breed nasties during the summer months or will hot water run through that tubing in summer heating the floor ? So much for no A/C . By the way , the men that frequent and comment on this site are the very best that exist in the design , consultation , installation of heating systems . We regularly solve horrendous problems from 100's & 1000's of miles away that the average guy cannot figure out standing in front of scratching his head . My guess is that we'll be assisting him at some point also . How's that for a diagnosis ? Just so you know , the average time in the field before you can even be considered a heating technician is probably a few more years than the average doctor spent in school and doing his residency . See the human anatomy has not changed in millennia , heating systems change all the time , we are kinda more like veterinarians , many different types of anatomies .
@ February 9, 2014 1:36 PM in Hot Rod,caleffi hydro air seperator vs p/s pipingview that webinar and use the hydraulic seperators or a buffer tank to provide separation of the circuits . You are right that they cost roughly the same but that sep goes in much faster also .