Posted and emailed too (by mistake), however here's the newsgroup post:
On 29 Oct 2005 09:47:50 -0700, in alt.home.repair you wrote:
:That's strange. Couple things about your future furnace plans -
There's a few strange things about this house, not the least of which is
the additions that were made, which I still wonder about - what they did
and how and why. Some people have ventured opinions but none of them
have stuck with me. I guess either I'm dense or they're wrong.
:1) If you get a gas or oil (does anyone do new installs with oil ?)
:furnace that needs a chimney this existing thingy does not sound like
:something the contractor would want to hook into, based on code, etc.
:2) Better yet - if you get a super-efficient gas furnace, you don't
:need a chimney, the exhaust goes out pvc thru the wall.
:(If you're in a moderate climate you may do heat pump which obviates
:the whole chimney issue.)
To answer the questions:
I live in a pretty moderate climate. In the winter, nightime temps get
down to the low 40's, occassionally into the 30's and very very rarely
into the 20's (once a decade, maybe).
I don't think they use oil furnaces here. I presume I'd get gas.
So, you're saying I won't need that roof exhausting vent.
The m.o. will probably be to excavate a bit in the crawl space to make
more room for a furnace and install ducting in the walls, upstairs and
down (2 story 1925 square foot house). I don't know my heaters/furnaces
or what they're installing around here. Efficiency seems like a good
idea and I'm hoping to insulate my walls if and when I get the
foundation replaced and siding at the same time. Big projects needed
here. Thanks again!