Joined on July 24, 2003
Last Post on December 4, 2013
@ September 5, 2013 2:12 PM in Solid vs Engineered Hardwood for OverpourI prefer the pre-engineered hardwoods over a gypsum pour. Never had an issue with over 1000 projects using a quality pre-engineered wood product. We usually refer the client to either Khars, Junkers, Timbergrass (bamboo) or Launstein. These products do not off-gas and are a far more "Green" than using conventional strip oak. Acclimatizing the wood to the indoor temps is critical, before installation. The moisture content needs to be with 3-6% (depending upon product) before installing. Making sure the boiler has correct mixing controls to keep the surface panel temps under 85 degrees is the other part of the equation.
Using sleepers, as Hot Rod said, is passe.
@ August 31, 2013 12:28 PM in change old gravity systemI'd keep the old piping and install TRV's on each radiator. Make sure the new system is "pumping away" from the new expansion tank. Remove the attic expansion tank, which is most likely steel, and not "pre-charged" with a diaphragm.
Radiators in series is not a good idea.
@ August 28, 2013 3:17 PM in Vito Tight!Thanks, Carl. All boilers need a primary pump and the secondary pump from the FPHX is a SS Alpha. Yes, the FPHX requires extra and pricey components but only the NTI TFT boiler can be directly connected to a non-barrier system with SS pumps, without voiding the boiler warranty (to my knowledge). I can also set the curve for 2 different temps, if I needed them. This system has 1 curve for the FPHX and the DHWTank. I like the Viessmann controls, which give a lot of options for set-up.
@ August 28, 2013 2:16 PM in Vito Tight!This was the 3rd boiler since the radiant renovation 15 years ago. A reputable local company who had installed the Munchkin also missed it.
It's the first thing I look for when radiant tubing is present.
This is a very large problem in Seattle/King County. So many heating jobs were done without barrier PEX. The rooster does eventually return to the coop and crows....
@ August 26, 2013 9:42 PM in Vito Tight!Ferguson or Consolidated Supply in Seattle. They save a lot of space and make the installation look good!
@ August 26, 2013 8:43 PM in Vito Tight!It's a SS expansion tank bracket, made for potable connections. The steel bracket ( the red one) would have corroded on the system side of the FPHX.
@ August 26, 2013 7:25 PM in Vito Tight!This job had non-barrier tubing connected to a Munchkin 140 with iron pumps 10 years ago. The corrosion ate through the manifolds and shorted the telestats. Installed a new Vitodens WB2B 200-35 boiler and connected to the existing 80g indirect tank. Instead of a low loss header (which is steel, and corrodes), we connected a flat plate heat exchanger with 1" tappings between the boiler and system. The FPHX is oversized so primary flow can be achieved without "choking" the flow rate within the boiler HX. A stainless steel Grundfos Alpha runs the radiant loads. The manifolds were replaced with Uponor EP manifolds with adjustable flowports and telestats.
The closet was damn near impossible to shoehorn all of the components in.
The piping will be insulated after boiler inspection tomorrow.
@ August 22, 2013 5:47 PM in Boiler at Minnesota daycare explodesLooks like a missile strike! Where were the boiler experts that should have been servicing this system? Good thing nobody was hurt.
@ August 21, 2013 10:43 AM in viega [not] bagging press sleevesIt's easier to stock the fittings with the sleeve pre-installed. It's not a conspiracy. The fittings also have an indicator that's removed after pressing. I don't find the pricing very different and there's convenience in not having technicians loose the sleeves, or wonder if you've ordered the right amount of sleeves vs. the fittings.
@ August 20, 2013 11:10 PM in New Style for Butt Krack PlumbersGreat Style!!
@ August 15, 2013 1:28 PM in Pex spacing for under floor radiant (joist bay)Here's the Uponor manual for Joist Trak heating.
The correct method usually uses 3/8" barrier pex on 8" centers per joist bay, using aluminum transfer plates. Loop lengths should not exceed 200ft. for 3/8" pex.
Any contractor who doesn't use the correct method will saddle you with a home that doesn't heat properly and has high fuel costs.
@ August 12, 2013 9:56 AM in Viessmann questionI suggest that there is either a check valve(s) missing or a programming error, or both. Bring back the contractor...the system should not heat the radiators in WWSD.
@ August 8, 2013 5:09 PM in Prevailing wage questionsWhy does a prevailing wage job double the completion time?
@ August 1, 2013 5:11 PM in Lightning causes gas leaks on street mainhttp://www.komonews.com/news/local/Lightning-strike-sparks-gas-leak-in-Sammamish-217920141.html
@ July 31, 2013 7:36 PM in Mikvah...would be Moses Fishman. (firstname.lastname@example.org) He designed and installed one of the largest mikvahs in NYC. He's a friend of Dan's (and mine) and should be happy to answer any questions. Tell him I sent you.
Hot Rod wrote an article about him and the mechanicals:
@ July 31, 2013 12:25 PM in spray foam directly on radiant plates?While the dead air space is not needed, it is not the best idea to get the foam on the piping and plates. There may be a chemical reaction which could affect the piping. Batts are best. It's also impossible to access the piping once it's foamed.
@ July 31, 2013 9:47 AM in Grunfos AlphaIt's unusual that the Runtal has reduced flow. I'd be looking at why, rather than adding an extra pump. Since the Runtal was added long after the original radiators were piped, the connection to the original mains might be backwards or the near boiler piping is not set up for "pumping away" on the supply header from the expansion tank location. This presumes that the Runtal rad is rated less than 10K btus since 1/2" piping is connected.
@ July 30, 2013 6:35 PM in Looking for a good propane boilerThe Viessmann Vitodens 200 can be used with either propane or nat. gas without changing the gas valve. The LP conversion takes under 2 min.(boiler comes set up for nat. gas).
@ July 30, 2013 10:35 AM in Adding radiant to cast iron hot water systemas long as you use barrier PEX piping, and the correct mixing valve/control, there will be no problems.
@ July 29, 2013 3:02 PM in Adding radiant to cast iron hot water systemThe radiant floor heating zone would use either a 3 way or 4 way mixing valve and pump for the new radiant zone. If there's a mod-con boiler, a 3 way valve is used. If a cast iron boiler, a 4 way motorized valve is used with a control (usually Tekmar) to prevent thermal shock of the cast iron boiler.
@ July 25, 2013 11:33 AM in Fire Damaged Package Heat Pump UnitYou should post this under the A/C, Refrigeration and Heat Pump section. There are experts that can help you.