I have a Direct Vent OIL furnace (high Efficiency)
The installer ran the exhaust chimney out of the side of the furnace at 4'
and through the wall at about 8' The exhaust vent is flexible corrugated
stainless tubing 4" in diameter. There is no fresh air feed from outside at
Whilst having an oil tank certification at the end of last year the OIL guy
tells me that the intake and exhaust system is not set up correctly and does
not meet code. He tells me that there needs to be a 4" intake installed to
draw fresh air in to the "pump or blower?" This seems to be quite a simple
task however when speaking to the local "1hour heating guy" he tells me
different. His comment are as follows
1. if you install the intake too close or too far away from the exhaust vent
then you will have possible "-" or "+" pressure problems.
2. After installing the intake the furnace need to be re-dialed in to
compensate for different air.
3. The chimney I have has no protection between the floor joists and should
have plates installed as heat deflectors
4. yearly cleaning must be done to ensure correct operations.
I have had this setup (apparently wrong) for 8 years now and it is working
perfectly. The exhaust is not sooty at all and there is no staining on the
outside of the cottage. (this surprised the heating guy). I don't want to
do all of these revisions to get soot and less efficiency. Currently I get
better efficiency than any other cottages with similar setups. My
consumption of OIL to heat a cottage at 50 degrees all year long and 70 on
the weekends (almost every one) is about 1000 litres of fuel. The cottage
is 2400sq feet and really well insulated.
Finally this building is 8 years old and was certifies by the building
inspector for occupancy. If infact my venting does not meet code wouldn't
he not have provided an final inspection?
Any suggestions welcome.