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Old 04-16-2012, 06:23 PM   #31
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Negative Pressure in Furnace & Heater Room


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Originally Posted by Jackofall1 View Post
Heat rises, you have a good natural draft going, yes the wind does help at times. Did you try this test with the door closed to the room?

My point is that if, the vent is working correctly and it sounds like it is you would be hard pressed to get your landlord to move on this.

Given the CO sensor has never gone off, I would venture a guess that you are not drawing HW tank fumes back in to the room.

Is the install correct OH heck no, will it work sure it will.
I think you're right. I tried it again with the furnace and the HW on and the smoke still went up the vent pipe. Eventhough the installer was concerned about the negative pressure, it seems this has proven that there is no backdraft after all. Hmmm...which means he might actually get his way; destroy a perfectly beautiful oak door to put a unsightly monstrous register and the deafening noise...

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Old 04-16-2012, 06:49 PM   #32
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Negative Pressure in Furnace & Heater Room


would never in a million years pass where i come from..... let alone the noise....
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Old 04-16-2012, 06:51 PM   #33
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Negative Pressure in Furnace & Heater Room


If no one is going down there to watch tv, or live, I would not worry about the noise. But I would worry if the cold air return does not work as it should on the main living area, due to the removal of the duct work.
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Old 04-16-2012, 07:22 PM   #34
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Negative Pressure in Furnace & Heater Room


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If no one is going down there to watch tv, or live, I would not worry about the noise. But I would worry if the cold air return does not work as it should on the main living area, due to the removal of the duct work.
The family room is where we have karaoke, play video games and watch movies on projector. The last one is probably best experienced in a quiet room. It probably wouldn't matter much for the other two.

But you're right, Carmon. I hate the noise of the furnace, esp. when both are running.
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Old 04-16-2012, 07:25 PM   #35
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Negative Pressure in Furnace & Heater Room


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The family room is where we have karaoke, play video games and watch movies on projector. The last one is probably best experienced in a quiet room. It probably wouldn't matter much for the other two.

But you're right, Carmon. I hate the noise of the furnace, esp. when both are running.
I see your point.... we have customers with 2 furnaces side by side and you barely hear nothing.. i can only imagine the noise with no return air duct attached to it..... cant be good
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Old 04-16-2012, 07:56 PM   #36
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Negative Pressure in Furnace & Heater Room


The one thing that I would be worrying about, is when the bath vents and kitchen stove vent is running, if it pulls from the basement any airflow, due to the ductwork not hooked up. As for noise, it would only really be noticeable if the vent for the CAR is in the living room, and it drops right into the basement at that point.

As for furnace noise, it depends on the unit and if it is always running at the highest stage, not the lowest as it should for the majority of the time, if it was set up properly along with the thermostat.

I know that when I pull the air filter while the furnace is running, especially when we have the A/C on, you can tell due to it will start whistling through the port that you pull the filter out through the top of the duct work for the return. As for the OP, I would be concerned about the fact that the overall quality for the unit that serves the basement, if no one is down there, it should just be shut down, due to it really will serve no purpose in a uninhabited space.

If they are using that space for entertainment, dial the thermostat down during colder periods of the year, and up for warmer periods, or just shut it down completely until you go down there. As long as the main floor unit is doing its job, the basement will stay reasonable. If there is a programmable thermostat for the basement unit, set it on hold, or adjust the time settings for the periods when you will be down there, and see how that goes for right now.

BTW, if you have a iPhone or Android phone, you can get a SPL meter app and take readings with the furnace units running, with both the door closed and open and see how it does. You can also do a test how it would work with venting in the door, if you have a piece of plywood or cardboard large enough to cover the doorway, and cut a vent of at least 24x24 and see how the noise levels change.
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Old 04-16-2012, 09:03 PM   #37
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Negative Pressure in Furnace & Heater Room


If I was checking the HWT vent it would be with...
(1) The fan running on the furnace with the missing return air duct.
(2) House Windows and doors closed.
(3) The dryer running.
(4) The HWT firing.
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Old 04-16-2012, 09:09 PM   #38
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Negative Pressure in Furnace & Heater Room


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Originally Posted by how View Post
If I was checking the HWT vent it would be with...
(1) The fan running on the furnace with the missing return air duct.
(2) House Windows and doors closed.
(3) The dryer running.
(4) The HWT firing.
If i was checking it what be what hotel I liked the best.....
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Old 04-17-2012, 06:23 AM   #39
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Negative Pressure in Furnace & Heater Room


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Originally Posted by gregzoll View Post
As for the OP, I would be concerned about the fact that the overall quality for the unit that serves the basement, if no one is down there, it should just be shut down, due to it really will serve no purpose in a uninhabited space.

If they are using that space for entertainment, dial the thermostat down during colder periods of the year, and up for warmer periods, or just shut it down completely until you go down there. As long as the main floor unit is doing its job, the basement will stay reasonable. If there is a programmable thermostat for the basement unit, set it on hold, or adjust the time settings for the periods when you will be down there, and see how that goes for right now.
This is exactly what I'm doing right now except when my brother's family was over.

Quote:
BTW, if you have a iPhone or Android phone, you can get a SPL meter app and take readings with the furnace units running, with both the door closed and open and see how it does. You can also do a test how it would work with venting in the door, if you have a piece of plywood or cardboard large enough to cover the doorway, and cut a vent of at least 24x24 and see how the noise levels change.
I downloaded a few apps on my android tablet but I think the mic is not sensitive enough, as it only increased the level by 3-4 dBs outside the room with the door slightly open. A few feet into the furnace room, the meter jumped from 32dB to 62dB, though. A phone would probably be better or better yet, a sound level meter (could be useful in the future, too).

Thanks.
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Old 04-17-2012, 06:27 AM   #40
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Negative Pressure in Furnace & Heater Room


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Originally Posted by how View Post
If I was checking the HWT vent it would be with...
(1) The fan running on the furnace with the missing return air duct.
(2) House Windows and doors closed.
(3) The dryer running.
(4) The HWT firing.
I tried all these except for (3), as the dryer is upstairs and has a dedicated vent pipe. The result was still the same: The smoke was sucked out of the HWT hood.

The wind is calmer now, so I'll give it another try.
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Old 04-17-2012, 10:06 AM   #41
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Negative Pressure in Furnace & Heater Room


While the dryer has it's own dedicated vent, it's not clear if it has it's own dedicated fresh air supply. The volume of air the dryer forces out of the home has to replaced and chimneys are the usual replacement source of that replacement air in a sealed house.

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