Joined on November 26, 2011
Last Post on March 7, 2014
@ November 1, 2012 12:43 AM in timerI prefer occupancy-based controls of residential recirc pumps, but existing commercial buildings can get rather complex. If you do use a timer, you might try one that's sunrise/sunset aware, e.g. http://www.aubetech.com/search/index.php?recherche=Switches&recherche2=5
@ October 31, 2012 9:03 PM in Adding a fan coil to a hydronic systemWhat temperature does your staple-up system run at? Is there an outdoor reset?
What fluid temp does the fan coil run at? Is it providing enough (or too little/much) heat?
@ October 29, 2012 3:27 PM in Unheated basement, cold main floor, hot 2nd floorI'm not a fan of spray foam - in large part because it doesn't breathe. Wet-spray (sometimes called damp-spray) cellulose is one option that does. In the hands of a skilled operator with the right binder it can be sprayed underneath floor joists.
AirKrete is another option if the basement is infrequently accessed.
@ October 29, 2012 2:10 PM in improper boiler install?Stands for BackFlow Preventer. 9D is one of those http://www.watts.com/pages/_products_details.asp?pid=886
@ October 29, 2012 2:07 PM in Using an indirect tank as a heat exchanger.provide the best comfort and more flexibility for solar or other low temp heat sources later. They really deserve a buffer tank between them and that high temp gasifier. Have you had a chance to read that Idronics issue yet?
@ October 29, 2012 1:43 PM in Unheated basement, cold main floor, hot 2nd floorIf all the floors are uninsulated, your HOA should probably undertake to insulate the whole place. Get an insulation contractor to quote you on wet-spray cellulose or foam or something that can properly fill all the voids and your comfort level will increase quite a bit.
You may still have balance issues afterwards but you need to insulate first.
@ October 29, 2012 2:43 AM in Keeping Steam System Completely Off in Chicago WinterVewwwwwwy interesting. What era?
@ October 29, 2012 2:40 AM in Inspector comes to his sensesUnfortunate, because a few feet of CPVC on the hot side can really take the stress off.
@ October 29, 2012 2:37 AM in Navien CC210 natural gas.With you 100% there - a proper room-by-room heat loss will get the boiler, pipe, and emitter sizing close enough that the system will balance. Tuning the reset curve(s) can take awhile.
@ October 28, 2012 7:42 PM in Navien CC210 natural gas.Just bump the curve up a few degrees and the TRVs will move out of full open position during normal operation.
@ October 28, 2012 7:36 PM in replace analog with digital thermostatThat looks like a rebadged Honeywell http://www.honeywell-thermostat.com/line-voltage.html
@ October 28, 2012 5:46 PM in Using an indirect tank as a heat exchanger.Is there something in particular about this boiler that made you choose it over other designs? A pressurized boiler will simplify the system and reduce or eliminate chemical requirements.
What kind of radiation do you currently have? What design temp is/was it sized for?
You really need to work through the entire system design before you purchase anything. Outdoor reset, zoning, and other factors can change your piping layout; getting it right the first time will save you both time and money. If you have budget constraints, deciding what to buy now versus later should follow a complete design.
@ October 28, 2012 11:51 AM in Using an indirect tank as a heat exchanger.Whose gasifier? Open or closed system? Most gasifiers require a large buffer thank in order to operate safely at maximum efficiency.
Read this http://www.caleffi.us/en_US/caleffi/Details/Magazines/pdf/idronics_10_us.pdf before you start buying parts.
@ October 28, 2012 11:45 AM in Help - my pipes sank!If it's not big enough, a nipple wrench may do the trick.
@ October 28, 2012 1:41 AM in Navien CC210 natural gas.actually a proportional, modulating thermostat.
@ October 27, 2012 1:25 AM in Navien CC210 natural gas.Assuming there's no indoor sensor and associated controls logic, an indoor tstat is still useful as a high limit control Set it a couple degrees higher than the desired indoor temp and it will prevent the boiler from firing when there is heat gain from some other source (wood stove, solar gain, cooking heat, etc.)
@ October 24, 2012 3:32 PM in Failed steam boiler and chimney too small to ventor at least having some drawings and a few photos, one other option comes to mind:
Install a steam boiler that comes factory configured for power venting (Burnham Independence PV comes to mind, which works with 3” AL29-4C) plus an indirect water heater. This will simplify the venting and may allow you to use the existing chimney. It will also give you more hot water at better efficiency than most tank heaters.
@ October 23, 2012 11:50 PM in Ok to put Stainless Tubing in concrete?A couple years back, Wilo told me they were going to build the potable version of one of their new pumps in stainless rather than bronze -- because it was cheaper.
Viega rep told a few months back that thinwall stainless ProPress pipe & fittings frequently cost less than the copper equivalents.
@ October 23, 2012 8:48 PM in Header SizeI'm envisioning a street 90 threaded into a standard 90 to create the U-turn feeding the drop header. That configuration actually removes one threaded joint from the chain (as compared with two standard 90s joined by a close nipple.)
@ October 23, 2012 6:23 PM in Series ECM BlowersGiven that these are EC motors, the question is really about controls.
@ October 23, 2012 11:31 AM in New Mini tube installationI look forward to seeing what kind of numbers you get from the MegaSteam / EZ-Gas combo.