Home Improvement Stack Exchange
Home Improvement Stack Exchange

Questions tagged [flue]

32 questions
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Is it safe to live in a home with a blocked water heater flue?

So, not my home, but I'm in an older home with two other apartment units, and one of the units had mentioned that they haven't had hot water since last Friday, making it 6 days now. Their unit has a gas bill and gas payment, so the Gas company was…
A. Bernardi
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Gas Combustion Air Duct Re-Route Considerations

What are the safety/legal considerations for safely re-routing gas combustion ducts? I have a two-story house with two gas combustion air ducts. The left duct serves a fireplace that is not in use and will be removed. The right duct serves both the…
JJ Zabkar
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Gas water heater fails draft test

The guy from the gas company turned on my gas water heater and held a lit wooden match near where the flue sits on top of the water heater - it blew out. He says it's not getting a correct draft. The flue is 3" diameter and about 4 ft. long, it has…
Gary Ware
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Chimney Questions

Noob home owner here. We just tried to get our fireplace cleaned for the winter. The guy that came out said we have an old double flue system that's dangerous and can't be used... He said we need to replace to a newer flue system or replace with gas…
Alan Schwegler
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How to detach insert fireplace from flue (without damaging/cutting flue)?

I have an insert fireplace that is on a raised platform. I want to lower it to normal height (i.e. almost level with the floor). I am looking at the setup and I am not sure how to (non-destructively) disassemble it. The problematic part is…
msouth
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Remove fireplace leave metal chimney on roof

I removed a wood-burning stove and cut through the double-lined metal chimney flue in the attic. In the short term I jammed some insulation in the metal liner and left the rest of the chimney with the existing cap (see pic) on the roof. The top has…
par
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How to disconnect furnace inducer from flue?

I need to replace the inducer in my ICP furnace model NTC6100GFA1. It is still working, but it has both a rattle and a high-pitched bearing whine that I'm sick of hearing. My only questions regard the connection between the inducer assembly and the…
ybull
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HVAC flue vent making weird noise

My HVAC system is forced hot air, with natural gas. The flue vent is making a weird noise when it's on, kind of like water sloshing around. It's hard to describe the noise, so here's a video (it's a bit louder in real life than it appears in the…
Rodrigo
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Wood burning stove chimney leaking

A house we bought a few years ago has a newly fitted wood burning stove and chimney. During combined heavy rain and high winds we will get water leaking down our inside wall near the stove. I’m went up there last time this happened in 2020 and…
JonnyIrving
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I think my gas boiler flue looks off

We had a gas boiler installed. The registered installer did not highlight any issues with fitting the boiler before fitting it. I was away when the job was done and now there is a "snorkel" never mentioned pre work up on my front wall on the…
Jane Deane
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How should I seal a flexible flue liner passing through large clay thimble?

I'm replacing my atmospheric venting natural gas water heater and I'd like to clean up the type B venting solution while I'm at it. I've had a high efficiency furnace put in so now only my gas water heater is venting through what I've found to be a…
Barrett
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What are these copper pipes and do I need to do anything to them before covering them with a wall?

Home was built in the 1950s, and this is where there was originally a shop in the back of a basement garage. We just tore out the wall that had been put up here (sometime in the 80s?) and were surprised by all of the loose ends that hadn't been…
reynoldsnlp
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Can I make hole above a lintel for a flue

I'm doing some work on a flat and want to move the boiler higher up than it is. That means putting a flue above the window. The problem is I'm the second to top floor flat. As you can see from the picture attached, I have three options. Ideally, I…
Prisoner
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B-Vent Flue Condensation

We have had a water spot appear and not go away in our master bath. After looking around I found out that the flue pipe, B-Vent, is dripping with condensation when the furnace is running. I have changed the heat cycle on the thermostat to a slow…
T0t3sMcG0t3s
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3” water heater vent into a 2 story brick chimney. Reducing 8” steel to 4” through roof?

I have a 3” vent from gas water heater in the basement venting into a 2 story brick chimney (nothing else vents into the chimney). In the attic there is an 8” round steel flue through the roof. Can I reduce the 8” steel flue to 4” steel flue through…
Mark P Franciscovich
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