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Q: How do I know if he really cleaned my chimney? In the past, sweeps we’ve hired have always gone on
the roof, checked the flashing, the mortar and all the workings of the chimney and then cleaned the
chimney from the top of the house. Today, this sweep came in, looked into my fireplace from the bottom
and said we don’t need it clean because he can still see the bricks. We asked to have it cleaned anyway. He
then grabbed a wire brush and simply rubbed away any buildup from the main opening to the fireplace
without even going up into the chimney to clean anything. Am I way off base, or did the sweep charge me
without cleaning my chimney?
A. Our past experiences with chimney sweeps sound as though the sweep did the job he was hired to do.
However, your most recent experience sounds a bit odd. If the sweep agreed to do a complete sweeping
and only cleaned the brick in the fireplace firebox, you did not get the service that you paid for. A
complete chimney sweeping includes the chimney flue and smoke chamber.
Chimney Cleaning
Chimney Inspection (3 levels)
Animal Proofing
Chimney Repair
Chimney Restoration
Chimney Relining
Gas Fireplace Installation
Wood Stove Installation
What About Chimney Relining?
The homeowner posed these topics about chimney relining: I am in the process of accepting bids from various companies to have my chimney relined. I
need some education on proper fit of the area between my furnace and the flue.
My furnace has an 8" exhaust. Most of the estimates I have received involve the technician fabricating some sheet metal that funnels down from the 8" pipe to
connect to a 6" liner that then goes up the chimney. The furnace in question is an oil furnace boiler that does double duty as my water heater. Most of my
estimates for liner replacement are predicated on use of 6" stainless steel tubes to bypass the eroding masonry that now exists. They would then hook up
directly to my furnace which currently uses an 8" exhaust to connect to the chimney. I am not sure how this will be accomplished in all cases, but I have been
advised of several different methods.
One company pointed out that the difference between the size of the existing exhaust pipe and the liner could negatively affect the draw of the chimney. They
stated that the inside of the chimney needed to be gutted, after which it would be able to accommodate a 7" liner. This would result in the difference between
the exhaust pipe and the liner of only 1" and that would be sufficient to ensure proper draw.
I have also been told that most modern furnaces use a 6" exhaust port. This further complicates matters, since the furnace I now have is very old and the end
of its service life is probably sooner than later.
A 6" liner would fit easily inside the brick chimney, but accommodating a 7" stainless liner would necessitate rebuilding the chimney. This would increase the
cost by 100% over other estimates. My question is, can I use a 6" liner with an 8" exhaust pipe from the furnace and still safely operate my furnace?
This leads me to several different scenarios: Do I pass down a liner through the chimney but not connect it directly to the exhaust port of the furnace? Do I
connect to existing machinery with a 6" liner or a 7" liner? If I connect with a 7" liner and later have to replace the furnace, am I faced with having to replace
the 7" liner with a 6" liner so as to fit the new exhaust? Do I preemptively replace the furnace and the liner at the same time? My furnace is approximately 15-
20 years old, but has been well-maintained and currently has no real problems. As a bit of history, I currently own my house outright and WILL be moving within
five years to a different location entirely. I do not want to sink any money into this house that is not necessary. I absolutely want to ensure that my furnace
operates safely so I don’t just camouflage problems so I can sell my problems to someone else. I also want an honest job done for a reasonable price. Could you
offer me your opinion of which option to focus on?"
ADVICE FROM CSIA’S TECHNICAL DIRECTOR: If you go with the 7" liner, and the sizing charts allow it that would be a reduction of only one size. When you go
to sell your home, this reduction of one size from the previous 8" liner could be justified with sizing charts. The building inspectors will often allow for a
reduction of one size if it is an engineered system.
If you have occasion to change out the furnace, the 7" would be a step up of only one size and it
should work just fine. You might consider having the flue insulated to reduce condensation inside the
flue, especially with the future new appliance that would be a higher efficiency unit. Learn more
about chimney liners here.
AFTER AN EXTENDED CONVERSATION VIA EMAIL, THE HOMEOWNER MADE THE FOLLOWING DECISION: Your advice tells me that the cheap way (put in the least
expensive 6" liner and keep the furnace I have) is not a good idea from a safety perspective and it is not a long term fix of the overall problem. The 7" liner
would work, but it would set me up to select the most expensive solution, vis-a-vis the liner, and then I would spend more money later adapting a new furnace
should the need arise.
The difference in cost between putting a 7" liner in the existing chimney and a 6" liner is $1,100. If I put in the 6" liner, I can put the $1,100 into the purchase
price of a new furnace that already requires a 6" liner. Then, in five years when I go to sell the house, it will have a five year old, high-efficiency furnace
instead of one on its last legs. A new more-efficient furnace will also allow me the added benefits of fuel cost savings over that five year period. A 6" liner will
allow me room to follow your suggestion to insulate the flue. And last, but certainly not least, for the next five years, every time I hear the furnace kick on I
won’t have to worry if it is going to break down on me or fill my home with carbon monoxide.
Expert Chimney Services is a family-owned, full-time business. It is
not a sideline or a temporary weekend project.
We have the most modern, safe, and reliable equipment. We show up "on time" in a clean, late-model, properly-equipped
vehicle. Our staff brings to you decades of continual, accredited experience with chimneys in the Syracuse area. We know why
you call us the first time and will help you plan for a safe, clean chimney for the future.
4800 McDonald Road, Syracuse, New York 13215 (315) 469-5004
Replace Wood Fireplace with Gas