Wallknight wrote:What is code for the LP pipe? I've got 5.5" to the nearest joist. Not much I can do with it. The draft hood could only be lowered 1" according to the stamp on the side. Probably been like since well before I was born.
Single wall pipe should have 18" of clearance. There are plenty of installations that have less, but 5.5" is pretty tight. You could use double-wall pipe (needs 6" clearance), or install cement board on the joists with 1" spacers. Since you can't lower the draft hood more than 1", your options are limited.
Wallknight wrote:Power Venter fan: Why in the world would I drop $400 on a venter to upgrade a boiler that should have died decades ago? You must be the type to put turbo boosters in '84 Yugo's. My original plan was to rip the whole thing out and replace it with a totally different system, but decided to first check to see if there was a more elegant solution.
A power venter was suggested because it would solve the problem of different draft requirements for each appliance, and allow you to install a thimble for the coal appliance with the proper clearance from the joists. As it stands right now, you can't drop the propane flue pipe enough to get a second thimble installed, and installing a tee in that pipe still leaves the fly-ash issue.
Wallknight wrote:My original plan was to rip the whole thing out and replace it with a totally different system, but decided to first check to see if there was a more elegant solution.
If you can afford it, a stoker boiler installed in-place of the LP unit would be a great solution.