Joined on March 31, 2006
Last Post on January 2, 2007
@ January 2, 2007 12:45 PM in beacon and morrisEd, when they put that coil together they expand the copper tubes to create a friction bond with the fins. I would suggest just ordering a new complete coil. Ted
@ June 2, 2006 3:02 PM in AC options for house with steam heatJoe have you looked into a High Velocity system? With a high velocity system the branch ducts are very small and can reach areas where conventional ducts would be trouble. Check out spacepak.com and unico.com
@ May 16, 2006 8:36 AM in high effency boilersThe Hydrotherm KN boilers are modulating condensing boilers that have a cast iron heat exchanger. It's a down fired counter flow design that is fuel air coupled providing stable co2 throughout its range(it never burns dirty). At the moment they offer a 750 mbh, 1000 mbh and a 2000 mbh. 5:1 turn down. As far as the life expectancy ? I don't know, it is cast iron.
@ May 11, 2006 10:48 AM in residential chilled water systemsThese guys make small chillers for residential applications. http://www.aquaproducts.us/dcp.html
@ May 11, 2006 10:30 AM in Duck-less Mini Splits (ME)Mark, I'm curious as to why your customer would not consider a central High Velocity system?
@ May 5, 2006 1:54 PM in Old H. B. Smith boilerBruce, It must be a 350 Mills which w/ 12 sections has a IBR gross output of 2,240 MBH.
@ May 5, 2006 1:36 PM in Did I make the right choice?Eric, I've read that heatpump hot water heaters are 3-5 times more energy efficient than electric resistance water heaters and they can also provide a source of cool air to your house in the summer time. I'm sure they must be more expensive than an electric resistance heater however.
@ May 4, 2006 9:11 AM in Btu eater.i'm telling you Dave I know these guys and if the boiler showed up on the job site without crud on the inside of the heat exchanger then they are not responsible. The internal passages on these Ginoni heat exchangers is very slim and the material is not that thick. Atached to a system like that strainer or not I'll bet you $50 you don't get 10 years out of the heat exchangers. To be honest I would never install one of those boilers directly to any system that has steel pipe in it. Just my opinion.
@ May 4, 2006 8:53 AM in Kick space heater questionGary, Beacon-Morris has an optional clip on sensor for low temperature applications.This from their insatllation manual: "An optional low temperature aquastat, 120° to 105° F (49° to 41° C) is available." for about $12 PN 3024-1
@ May 3, 2006 9:40 AM in Btu eater.Dave, to quote NYT rep; "If you bring all that crud and puke from the old system piping back to the new boiler and coat the inside of the heat exchanger, you void your warranty."I think in the manual they suggest cleaning the system piping out with some chemicals.
@ May 3, 2006 8:18 AM in Youthful Statements"We can say it came out of the box like that, you know shipping damage. They'll have to give us a new one."
@ May 2, 2006 3:06 PM in What is a sweeping tee?They are brass and used in hydronic systems to create a pressure drop to force flow through a heat emmiter.
@ May 2, 2006 2:59 PM in Fin tube ceiling convectorsScott try this sterling commercial specifier (http://www.sterlingheat.com/sterlingfte/Select.aspx) Click on the select button on the enclosure type. you probably want double slope cover? is "condensing boiler" the new customer buzz word ? Why waste your money on a condensing boiler for this type of system. in order for a condensing boiler to condense flue gas the return water temp must be 140º or lower. The ideal range is 100º-140º, this water temp does not work well with fin tube. I would suggest an 87% efficient boiler will provide just as as much efficiency as a condensing boiler on the same system at less capital cost and likely less maintenance cost.
@ May 1, 2006 9:20 AM in condensing boiler and Hi VSpacepak can be used as a primary heating source, in fact the coil performance is probably better than the Unico coil. What I tell customers in your situation is to leave the steam system add an 86% boiler with domestic water capabilities(http://www.embassyind.com/pdfs/embassyind_ambassador.pdf), put in the High Velocity system (DX) with hot water coil. You might even consider installing hte DX system as a heat pump giving you the option to choose which fuel you want to use most of the year. This type of system has options and redundancy.
@ April 28, 2006 4:37 PM in condensing boiler and Hi VWith the add on coils you definately want hotter water. As far as the 140º I mentioned that was the lowest rating curve in the catalog. I'm sure Unico also has a water coil unit but I'm not familiar with it. With most any water coil airhandler you are looking for 180º-200º water @ 2-5 GPM to get any decent performance out of it. Don't forget that air doesn't carry heat nearly as well as water does and High Velocity systems use aspiration to mix the air dilivered from the outlet with the room air to equal a net air temp. On the other hand if you are putting in a radiant system (which requires 80º- 140º water) and just using the air system to temper fresh air make up then you can get away with lower temp water. A lot of systems that mix radiant with High V systems use and HRV or ERV (depending on the cilmate) which dumps into the return of the air system to distribute the fresh air throughout the house. These units use the heat from the outgoing air stream to heat the incomming air in the winter and the percentage of fresh air (from the HRV) to the return air stream (from the warm house) is small.
@ April 28, 2006 2:53 PM in condensing boiler and Hi VMost of the systems you see are DX cooling with an add on hotwater coil (anywhere from 2-4 row). I know that Spacepak also offers a water coil unit model WCSP which has a 6 row water coil which could work with 120º water. This unit uses chilled water for the cooling side.
@ April 28, 2006 8:47 AM in Recessed baseboardThere is no fan on the Floor Vector it is just a convective unit. I'm not sure weather or not you can order it with a steel pipe element or not but you could order a steel element and make your own enclosure as long as you could get the return to work out.
@ April 27, 2006 4:22 PM in BTU's on baseboard ??i think that they only have ratings down to about 140ºF with with a high capacity baseboard can give you up to 420 Btu/LF at 4 GPM or 400 BTU/LF @ 1 GPM. I have always heard that with water temps lower than that the convection really drops off but I've never tried it. Check here http://www.sterlingheat.com/litlibrary/ClassicBBSubmittal.pdf
@ April 27, 2006 2:09 PM in Super heat not stabileif the valve or orifice is oversized it will hunt. Try moving the bulb further down the line.
@ April 26, 2006 10:29 AM in sidewall venting a high-efficiency boileris probably why. I have also seen a concentric vent used which combines air in and exhaust out into one penatration. I think it is much neater but also costs a bit more.
@ April 26, 2006 10:25 AM in High Velocity SystemsThat is true Jed. I'm curious, do you rely on the calculation or do you use an air flow meter on site?
@ April 25, 2006 10:30 AM in High Velocity SystemsI think there is less engineering than a properly engineered conventional system because all the duct is the same. To properly engineer a conventional system using manual D for duct and register sizing takes some time. Granted there are some different rules with High Velocity compared to conventional but after installing a few of them you know what to look out for. With all duct and registers being the same if you continue to install the product you generally end up with a few leftovers that can be used on the next job.