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Furnace sucking in dust from garage?

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Furnace sucking in dust from garage? dave 03-03-2007
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Posted by on March 4, 2007, 4:56 pm


> Notice that the panel which
>encloses the negative pressure area does not seal well around it. There are
>no seals!

The lack of a 100% seal is unimportant. The capacity to harm
is what's important. All furnaces as far as I know are similar to
yours in that the access door seals good enough.

Posted by EXT on March 4, 2007, 6:37 pm


Where are you? In most areas of North America, furnaces that heat houses are
illegal in garages because of the possibility of carbon monoxide and
gasoline fumes from the cars, and the inability to provide a one hour
firebreak between the garage and the house.

"dave" <nospam> wrote in message
> Hello and thanks to everyone who responded. Yes, the furnace is in the
> garage. Where would I be getting CO from? The furnace and water heater
> are both vented through stove pipes going through the roof. Here are some
> pictures I uploaded to illustrate better. Notice that the panel which
> encloses the negative pressure area does not seal well around it. There
> are no seals!
>
> http://mywebpages.comcast.net/dl1027/files/Furnace1.JPG
> http://mywebpages.comcast.net/dl1027/files/Furnace2.JPG
>
> Thanks,
> DaveL
>
>
>> dave wrote:
>>> I get a lot of dust in my house. I noticed the front panel on my
>>> furnace is not even close to air tight. I can see through gaps and
>>> holes directly into where the blower is (which is directly over the
>>> air filter). So the blower is sucking in some air from the return
>>> line and through the air filter, but a lot is coming through the gaps
>>> in the panel. Should I somehow seal this panel better and force all
>>> air to come from my air return vent which is located in the center
>>> hallway of the house? I don't understand this design of a furnace
>>> which takes no care in keeping dirty air from the garage out.
>>> Thanks,
>>> DaveL
>>
>> I don't like the idea of a furnace in a garage or sucking any air from
>> the garage. Combustible gases like gasoline and a furnace don't get
>> along. A garage often gets CO gas. You don't what the furnace getting
>> any of that so most if not all codes are not going to allow the furnace
>> to be in the garage. Also very important is the garage is a source of CO
>> gas. CO is poisonous and you don't want that sucked up into your home.
>>
>> Dust is the last thing I would be worried about.
>>
>> --
>> Joseph Meehan
>>
>> Dia 's Muire duit
>>
>>
>>
>



Posted by dave on March 4, 2007, 11:05 pm


California.

DaveL

> Where are you? In most areas of North America, furnaces that heat houses
> are illegal in garages because of the possibility of carbon monoxide and
> gasoline fumes from the cars, and the inability to provide a one hour
> firebreak between the garage and the house.
>
> "dave" <nospam> wrote in message
>> Hello and thanks to everyone who responded. Yes, the furnace is in the
>> garage. Where would I be getting CO from? The furnace and water heater
>> are both vented through stove pipes going through the roof. Here are
>> some pictures I uploaded to illustrate better. Notice that the panel
>> which encloses the negative pressure area does not seal well around it.
>> There are no seals!
>>
>> http://mywebpages.comcast.net/dl1027/files/Furnace1.JPG
>> http://mywebpages.comcast.net/dl1027/files/Furnace2.JPG
>>
>> Thanks,
>> DaveL
>>
>>
>>> dave wrote:
>>>> I get a lot of dust in my house. I noticed the front panel on my
>>>> furnace is not even close to air tight. I can see through gaps and
>>>> holes directly into where the blower is (which is directly over the
>>>> air filter). So the blower is sucking in some air from the return
>>>> line and through the air filter, but a lot is coming through the gaps
>>>> in the panel. Should I somehow seal this panel better and force all
>>>> air to come from my air return vent which is located in the center
>>>> hallway of the house? I don't understand this design of a furnace
>>>> which takes no care in keeping dirty air from the garage out.
>>>> Thanks,
>>>> DaveL
>>>
>>> I don't like the idea of a furnace in a garage or sucking any air
>>> from the garage. Combustible gases like gasoline and a furnace don't
>>> get along. A garage often gets CO gas. You don't what the furnace
>>> getting any of that so most if not all codes are not going to allow the
>>> furnace to be in the garage. Also very important is the garage is a
>>> source of CO gas. CO is poisonous and you don't want that sucked up into
>>> your home.
>>>
>>> Dust is the last thing I would be worried about.
>>>
>>> --
>>> Joseph Meehan
>>>
>>> Dia 's Muire duit
>>>
>>>
>>>
>>
>
>


Posted by mm on March 5, 2007, 2:14 am


wrote:

>Where are you? In most areas of North America, furnaces that heat houses are
>illegal in garages because of the possibility of carbon monoxide and
>gasoline fumes from the cars, and the inability to provide a one hour
>firebreak between the garage and the house.

Admittedly our ranch house was built about 57 years ago, but it had a
gas furnace in the garage.

I'd like to know who runs a car in the garage. You don't have to have
a furnace there. What about the people who are actually in the garage
for one reason or another.

I turn the car off as soon as I'm in the garage, 4 or 5 seconds, and
the big door is open longer than that.

Warming up the car isn't really necessary (unless maybe it's a new
car?) but I certainly wouldn't do that in the garage either, since I'd
be sitting right there in the car in the garage.

As to the OP, I never figured out where we were talking about until I
saw the pictures you list below. I'm sure there is dust there, but
why do you think it is entering your house. That is not where the
house air comes from. It comes from a heating duct that comes from
someplace in your house. It recirculates the same air, minus and plus
whatever is lost and regained through doors, windows, and cracks
around the window glass, the door frames, etc.

The cover is just there to make it look nice. The springy part so it
doesn't rattle. Heck, I haven't had the cover on for years.

The air for the fire does come in through there, but the fire is
separated from the air that circulates though your house by the heat
exchanger.





>"dave" <nospam> wrote in message
>> Hello and thanks to everyone who responded. Yes, the furnace is in the
>> garage. Where would I be getting CO from? The furnace and water heater
>> are both vented through stove pipes going through the roof. Here are some
>> pictures I uploaded to illustrate better. Notice that the panel which
>> encloses the negative pressure area does not seal well around it. There
>> are no seals!
>>
>> http://mywebpages.comcast.net/dl1027/files/Furnace1.JPG
>> http://mywebpages.comcast.net/dl1027/files/Furnace2.JPG
>>
>> Thanks,
>> DaveL
>>
>>

Posted by EXT on March 5, 2007, 2:28 pm



> wrote:
>
>>Where are you? In most areas of North America, furnaces that heat houses
>>are
>>illegal in garages because of the possibility of carbon monoxide and
>>gasoline fumes from the cars, and the inability to provide a one hour
>>firebreak between the garage and the house.
>
> Admittedly our ranch house was built about 57 years ago, but it had a
> gas furnace in the garage.
>
> I'd like to know who runs a car in the garage. You don't have to have
> a furnace there. What about the people who are actually in the garage
> for one reason or another.

The reason the laws are there is not for people who don't run a car in the
garage but for
safety in case someone does leave one running, it has happened and can
happen. The laws require a vapor proof seal between the house and the
garage. Also gasoline can leak or at least evaporate and being heavier than
air, it can pool on the floor. Most areas require any flames, furnaces to
heat the garage, and even electrical outlets to be no lower than 48 inches
above the floor. Also if there is a garage has a fire, and cars have had
electrical problems that caused fires when nobody is around, there should be
a one hour firewall between the occupied area of the house and the garage. A
furnace blowing air from the garage to the house would quickly facilitate
the spread of the fire or carbon monoxide through the ducts to the house.



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