Joined on November 26, 2011
Last Post on April 23, 2014
@ January 22, 2013 11:39 AM in How wood boilers control heat output?Oh my. This really does need some attention ASAP.
@ January 22, 2013 11:36 AM in a little perplexeduntil you pump it out into the distribution loop. The point of the tank is to let the boiler burn the whole load of wood without overheating or needing to be choked off.
How many pounds of wood does the boiler firebox hold?
@ January 22, 2013 11:13 AM in a little perplexedIs simpler than a dump zone. A standard (tank-type) electric water heater will do this at the lowest cost. Don't hook up the elements. You need to pump enough water to keep the temps under 160F and it needs its own relief valve.
@ January 22, 2013 11:01 AM in No pressure? (and a few other questions)to the middle of the gauge glass, or the NWL marked on the boiler. Where on the gauge glass does your waterline usually sit?
@ January 22, 2013 10:51 AM in No pressure? (and a few other questions)What is the distance (in inches) from the lower header pipe to the normal waterline?
@ January 22, 2013 10:39 AM in How wood boilers control heat output?Is affected by the rate of water circulation through the boiler.
Separating storage and distribution is not optional IMO with solid fuel boilers. As Mark pointed out, the boiler needs a large enough tank to hold all the BTUs in a full load of wood, minus some minimum load figure during the burn time on a mild day.
@ January 21, 2013 10:54 PM in What to look for in a contractor to replace my low pressure steam boilerresidential?
@ January 21, 2013 10:52 PM in Help with understanding the possibility of non-traditional use of PEXhttp://www.bodyhoops.com/ was started by a friend - they use HDPE tubing.
@ January 21, 2013 8:28 PM in Help with understanding the possibility of non-traditional use of PEXother than the contact with salt water on the external side of the PEX. Might have problems with EVOH, so perhaps a non-barrier PEX and nonferrous pump/boiler would be called for.
What is the heat requirement for the tank? This will determine the required length of pipe.
Silent -- hmmm. The acoustic coupling of water to PEX is quite good, so you'd need isolation between the pump and the tubing as a start. Probably worth conducting a little experiment to see what velocity is audible.
@ January 21, 2013 8:21 PM in Plg. & Htg. ContractorWhy not install a 40- or 50-gallon electric water heater instead, and limit the temps to something more reasonable?
@ January 21, 2013 3:07 PM in Primary/Secondary or Primary OnlyOn the flow requirements (load size) and the boiler HX design. Low restriction fire-tube heat exchangers can be direct piped much of the time.
@ January 21, 2013 2:59 PM in 160 combo-heaters removed from housing projectbecause they can do the work faster."
... by subbing out to every unbooked contractor in the region?
@ January 20, 2013 11:10 PM in Gifford LoopI doubt they'd even notice the couple of inch difference.
@ January 20, 2013 7:43 PM in ISERIES MIXING VAVLE VS. BUMBLEBEE CIRCBurns clean and has fantastic lubricity, but there are caveats:
It doesn't like cold (cloud point and cold filter plug point are both possible much of the winter.)
Its solvent action does a number on NBR O-rings and washers. A fluorpolymer like Viton will work.
The residual methanol attracts water, making it hard to keep dry (several times more water than you get in dino-diesel.)
...and PLEASE DON'T SHOUT when you write.
@ January 19, 2013 8:56 PM in 0013 taco circulatorhttp://www.taco-hvac.com/uploads/FileLibrary/101-064.pdf
@ January 19, 2013 8:45 PM in Boiler Plumbing Problemthat Chris posted above. Also available at http://www.caleffi.us/en_US/caleffi/Details/Magazines/pdf/idronics_10_us.pdf
@ January 19, 2013 12:47 PM in Large heating bills - where to go from hereas it will let you run cooler water temps, allowing a mod/con boiler to really shine. Room-by-room heat loss will tell you what temp at design conditions - be sure to size any additional radiators using the new supply water temp.
In-floor tubing will work better than dangling radiators, but needs its own reset curve. You can do this with onboard controls on better mod/cons, but if both zones are calling for heat at the same time, it's better to use a motorized mixing valve on the RFH zone.
@ January 19, 2013 12:35 PM in Vacuum air vents on one-pipe systemsPlenty of DDC manufacturers make suitable controllers, and Mark S here has been rolling his own http://steamheat.thestaytons.net/ http://www.heatinghelp.com/forum-thread/143517/A-Steam-Enthusiasts-Outdoor-Reset-Control
@ January 19, 2013 12:30 PM in need help upgrading old MEARS thermostats...Honeywell and Aube both make suitable stats.
@ January 19, 2013 10:48 AM in Large heating bills - where to go from herebut the heating is insufficient, more radiant sounds like the right answer. As you seal and insulate the house, you will probably find the Unico useful for Make-Up Air. I'd leave the first floor outlets until I was absolutely certain they weren't necessary to the final design.
Where are you located?
@ January 19, 2013 10:34 AM in 0013 taco circulatorIs a pretty big pump for a residential system. Does the pump serve just this one coil? How big is the load?