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We have a old house and the gas hot water heater and the central heating unit is vented out an old chimney and the heater is building up condinsation, how do i vent the heating unit out the wall, unstead of the chimney.

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A CHIMNEY Liner is your best and cheapest solution to your problem,as furnaces and hot water tanks have gotten much more efficient over the years,
a lot less heat actually goes up the chimney to help remove the contaminants,up the flue ,depending on the size of your flue it may remain cold which help to create the condensation When the liner is installed it reduce the size of flue size which help to increase the temp.of the escaping air flow..the avg.cost of a decent liner installed.w/ furnace and hot water tank vented $ 350-$500 based on your area

Posted on Mar 24, 2012

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Actually if you vent your furnace by code, it would probably be cheaper to have a chimney liner installed up the old masonry chimney. you may be able to buy a kit and do this yourself. any time a new furnace with a draft inducer on it is installed, it must be vented into the proper flu material. if it was vented into your chimney, it may not have be installed by code for your area. you may talk to the instaled if they are still available and maybe that can return and do it correctly. if you leave this vented into your masonry chimney, the acid content of the exhaust will ruin the chimney. a liner will also get rid of the water problem you have.

Posted on Jan 27, 2009

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1 Answer

My stove heater is making a loud popping noise when it cools


if you are vented into a chimney with out a liner this can cause noise to occur because vent gases are slowed down because of vent build ups more heat into exchanger. If you can not change vent lower gas pressure.

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1 Answer

Can't isolate central heating from hot water


What is the basic problem and objective?
Are you trying to isolate the water heater vent from the heating unit vent?
Are you trying to isolate the gas lines because furnace is drawing too much gas and water heater will not work?
Or is your tankless being used for spacing heating also?
Why are you trying to isolate?
Before calling service technician, open following link for Bosch troubleshooting resources:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

May 01, 2011 | Bosch Water Heaters

1 Answer

I have a 3 year old ge smartwater gas water heater. in our ontario winters, the gravity vented unit spills exhaust into the basement because the pipe and chimney get too cold after the heater is off for...


Id try raising the chimney until you can get the smoke from a piece of paper to get sucked up under the draft hood. I believe theres a different problem then a cold pipe.raising the chim.might not be the answer.

Jan 17, 2011 | General Electric GE SmartWater Household...

1 Answer

So when a vented gas water heater smells lke kerosine, is there any way to fix it? Or is it time to buy a new one. This ine is only 2 years old.


I am a little concerned here to hear this one, you should never smell anything from a hot water tank! Have you ever had the flue,or chimney checked out? Just a guess but being that this heater is two years old I would say it is a venting problem. Carbon monoxide poisoning comes to mind here, so please make sure you have a clean flue, good and adequate size exhaust pipe off the top and solid connection to the chimney/ exhaust vent.Might I also suggest a carbon monoxide detector in the area of this heater please! You do know that it is an odorless,yet silent killer and there is no price to great to save a life.

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1 Answer

When the hot water heater is running water leaks from the chimney. the pipe from the heater to the chimney is dry upon removal. about 3 gals. of water leaks from the chimney with two showers.


If I understand correctly, your Bock gas water heater vent is causing water to leak down into chimney.
This is a very serious concern

Water leaking from water heater flue indicates improper venting.
The hot air gasses from water heater combustion contain water vapor, but the gas should vent out of house before condensate forms on pipes.
http://waterheatertimer.org/Water-at-bottom-of-water-heater.html#flue

The problem might be caused by a power vented furnace that pushes vent air from furnace down into flue pipe for water heater. As a result, the water heater doesn't vent properly.
There could also be a clog.
Light a match under water heater draft hood and see if smoke from match travels instantly upward.

There are two major concerns.
1) If vent is not working, it means that odorless CO gas is entering home instead of venting outdoors.
CO carbon monoxide is deadly poison.
http://en.wikipedia.org/wiki/CO_poisoning
This is a very serious concern
You can buy CO detector after vent is repaired.

2) Water condensate will eventually rust away vent pipes because of acidic content of the combustion vapor. It can be expensive to replace pipes, and pipes with holes pose risk of CO poisoning.

My suggestion is call a qualified plumber ASAP and explain what you observe.
Plumber will want to inspect the vent pipes, and may want to extend water heater vent pipe up further inside chimney so furnace is not pushing air back into water heater vent.
Plumber may also find blockage somewhere in the vent stack or chimney.
Also post on a professional water heater forum like the Tank to double check anything the plumber says to you. These are the pros.
http://www.thetankatwaterheaterrescue.com/forums/forum3/

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1 Answer

How much clearance do i need to leave on top of the water heater between the insulation and the chimmney? is the insulation fireproof?


Gas or electric?

1) Electric heater can be completely covered with insulation except TP valve. Set electric heater on insulated surface. Insulate pipes completely right down to tank.

2) Gas heater is different.
No insulation over combustion area, or gas valve, or air inlet or. No insulation on top of tank that will interfere with venting of dangerous combustion products including odorless CO gas. Foam insulation on pipes should stop 10" short of tank top. No insulation within 6" of the 3-4" inch galvanized vent pipe.

Here's photo with gas water heater insulation tips:
http://waterheatertimer.org/images/Insulate-gas-water-heater.jpg
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html

3) Tankless gas. No insulation on box. No pipe insulation within 12". No insulation near vent pipe.

4) How much clearance between heater and chimney?? Not sure what that means. Is that the water heater vent stack? Or where vent stack goes into chimney stack? No insulation on gas flue pipes. Or within 6 inches of 3-4" water heater vent pipes

5) Is insulation fireproof? Everything burns if it's hot enough. If you throw insulation into backyard fire, paper and foil will burn away and insulation kind of falls apart in the heat. Fiberglass insulation cannot be set on fire with a match. Foam pipe insulation will burn.

Dec 02, 2010 | Thermwell Water Heater Blanket

1 Answer

Every time we put on the central heating our water runs cold


What kind of water heater do you have?
In any case, it sound like a plumber should check out system.

Do you have indirect heater that gets heat from central heating boiler?
Most indirect/boiler combo heaters have control that is set to heat the water first.
If water is not getting heated, then the control needs repair.

Do you have gas water heater with gas central heating?
The central heater may be drawing so much gas from meter, that other gas appliances are unable to function. larger gas meter or gas line may be needed.
Or if furnace and water heater vent on same chimney, the backflow from central heat could be affecting burner on water heater especially if water heater has electronic sensor that stop combustion if air quality is bad. Venting problems can lead to CO poisoning, and are a serious matter.

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1 Answer

Hot water heater not venting properly.


Hi .. it appears that your house is very tight. From your description of leaving a window open , it seems that the gas heater is suffering from lack of make - up air. Forcing the gas exhaust up the chimney will not really resolve this. You will still be trying to move air out without any air input to replace it. You may be able to install a spring loaded vent so there will be an air exchange. Something like a dryer or bath vent hood installed backwards .. this might work. There does not need to be much of a make-up air supply .. something like a 1 inch hole might be enough. I have seen this problem in a neighbors house , he weather proofed his house so good, that his fireplace would not light, no draft !

Any thoughts, concerns?

Please Vote !

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How does a draft inducer blower work


A draft inducer blower is used to create a proper draft in a chimney or exaust pipe from your water heater or furnace. In a high efficiency furnace or water heater, there is not enough heat expelled from the unit to the chimney to create a proper draft. The toxic carbon monoxide gas which is expelled through the chimney from your appliance is normally carried upward due to the rising hot air in the chimney. When appliances got more efficient (putting more heat into the water tank and less going out the chimney), manufacturers had to add this blower to help get the gases out the chimney since there wasn't enough hot air to create a draft.
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1 Answer

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