Lumberjack wrote:Hard to give a specific suggestion without knowing exactly what your setup is.
Mine is setup in parallel to the oil furnace and uses a back draft damper in each furnace to prevent air from flowing backwards through the system. The intake will pull from the intake of the old system and the output is simply piped to the rest of the ductwork. I needed the system to be easily removable and have a minimal impact on the existing system so that it can be return to the original state easily.
LsFarm wrote:I believe the best way is what Lumberjack describes.. your home is equiped with hot air supply ducts and cold air return ducts.. put the coal boiler in parallel with the existing furnace, and use back-flow dampers.
If I remember correcty lumberjack is in a rental house, so he ducted his system for minimal modification from the existing ducts and furnace.. so if he needs to he can disconnect and take the furnace with him when/if he moves.
The most important thing is to hook your cold air ducts to the cold air inlet/filter box on the coal furnace.. DON'T pull cold air off the basement floor,, this isvery inefficient.. you want to re-heat and re-fliter returned air from upstairs,
Hope this helps..
stokin-railroad wrote:Hi bwentz,i also am using a koker.works great as heat source 1200 sq.ft.all we did was attach flex duct from koker to furnace plenum last season.fall project is to hook as per leisure line diagram for fha.attach to cold air return from koker,check out l.l.website.a friend of mine who used to be in heating and a/c says that this should create a natural convection.warm air rises cold air settles makes sence to me.anyway it all worked fine as is last year so im going to change it and see if i can screw it up.you should be very pleased with your new heat this season.good luck! no cold air return used at all, was very comfortable.you can use starting collar for round duct work to a T to straight pipe with collar to cold air return if you really want to connect .some one posted pict.of a setup like this on forum.