New Posts  All Forums:Forum Nav:

Dead vent question

post #1 of 14
1/31/11 at 12:25pm
Thread Starter 
Hi,

I am in middle of building a basement home theater. For airflow, I am planning on using a dead vent with duct fan for inflow from the adjacent rec room. I am exhausting from the theater into adjacent room via a variation of the soffit muffler. I am a little nervous about not tying into the main HVAC trunk and was wondering if the following is feasible.

As it turns out, the dead vent is almost under the main trunk. I was thinking about tapping into the trunk, then joining the flex duct with the rec room duct in the dead vent box. I would have a damper on the main trunk flex tube so that I could turn it off during the winter when the heat is on, Any problems would doing this? Should I then install the duct fan ( Fantech 6...) on the exhaust side?
Reply
Reply

AVS Top Picks

post #2 of 14
2/2/11 at 8:22am
Thread Starter 
Bump. Any thoughts would be very helpful....
Reply
Reply
post #3 of 14
2/2/11 at 12:50pm
Im not following. You can connect the theater room to a dead vent. Then run flex to the main trunk. Not sure what the rec room duct has to do wth this.
Reply
Reply
post #4 of 14
2/2/11 at 12:52pm
Quote:
Originally Posted by hihuq View Post

Hi,

I am in middle of building a basement home theater. For airflow, I am planning on using a dead vent with duct fan for inflow from the adjacent rec room. I am exhausting from the theater into adjacent room via a variation of the soffit muffler. I am a little nervous about not tying into the main HVAC trunk and was wondering if the following is feasible.

As it turns out, the dead vent is almost under the main trunk. I was thinking about tapping into the trunk, then joining the flex duct with the rec room duct in the dead vent box. I would have a damper on the main trunk flex tube so that I could turn it off during the winter when the heat is on, Any problems would doing this? Should I then install the duct fan ( Fantech 6...) on the exhaust side?

You may be better served by visiting one of the many HVAC forums .. don't know what this has to do with audio / video ..
Reply
Reply
post #5 of 14
2/2/11 at 12:55pm
He's asking on this forum because its a sound isolation issue.
Reply
Reply
post #6 of 14
2/2/11 at 12:59pm
Quote:
Originally Posted by Ted White View Post

He's asking on this forum because its a sound isolation issue.

Don't see any isolation question in there .. looks like an HVAC question to me ..
Reply
Reply
post #7 of 14
2/2/11 at 1:03pm
Can you post a sketch of what you have in mind?
Reply
Reply
post #8 of 14
2/2/11 at 5:16pm
Thread Starter 
By having the dead vent connected to both the main supply and the adjacent room, I can close the damper in winter when the HVAC is supplying heat, but still get cooler air from the adjacent room. In the summer, I can open the damper to get the cooler air conditioned air. I could also open the damper to varying degrees to fine tune the theater temperature. Is this worth the extra effort?

If I have the dead vent supplied by just the HVAC, I will bringing in hot air to the theater in the winter. My room is on the small side (17' x 13') and I am afraid that it is going to get hot. I will be exhausting into the rec room.

I am truly sorry if this is the wrong section to ask this question. I learned about dead vents in this section so I thought I'd ask about them here.

I've included a sketch...
LL
Reply
Reply
post #9 of 14
2/2/11 at 7:54pm
Don't be the least bit sorry- this is the perfect place for this topic. In fact, I'm considering building something similar to what you have in mind.

When you say "exhausting from the theater into adjacent room", how does the air ultimately get back to the rec room, which is the air supply room for the HT, right? If it doesn't, or if you don't somehow "close the loop", then you will have a pressure imbalance which will thwart your efforts.

John
Reply
Reply
post #10 of 14
2/3/11 at 6:12am
From an isolation standpoint, I don't see a problem with that design
Reply
Reply
post #11 of 14
2/3/11 at 1:39pm
Your in the right forum for this question...

Since my basement is unfinished, I had two vent lines in the ceiling joists that where actually in the space I'm placing the HT Room in. I moved those lines to flex and placed them in a soffit I built for heating/cooling. I'm planning to build a deadvent to move hot air from Projector/body heat to a outside area of the room. Maybe another deadvent to bring in fresh air as well..
Reply
Reply
post #12 of 14
2/3/11 at 1:57pm
Thread Starter 
Quote:
Originally Posted by johnbomb View Post
Don't be the least bit sorry- this is the perfect place for this topic. In fact, I'm considering building something similar to what you have in mind.

When you say "exhausting from the theater into adjacent room", how does the air ultimately get back to the rec room, which is the air supply room for the HT, right? If it doesn't, or if you don't somehow "close the loop", then you will have a pressure imbalance which will thwart your efforts.

John

The adjacent room is the rec room. The intake and exhaust vents will be about 16 ft apart. So the loop will be closed.

You guys are a lot more encouraging then my wife WAF increrases if I modify the dead vent as described here.
Reply
Reply
post #13 of 14
2/3/11 at 1:58pm
Thread Starter 
Quote:
Originally Posted by HT_SoulMan View Post
Your in the right forum for this question...

Since my basement is unfinished, I had two vent lines in the ceiling joists that where actually in the space I'm placing the HT Room in. I moved those lines to flex and placed them in a soffit I built for heating/cooling. I'm planning to build a deadvent to move hot air from Projector/body heat to a outside area of the room. Maybe another deadvent to bring in fresh air as well..
Yeah, I'll have two dead vents. One for intake as described here, and for exhaust.
Reply
Reply
post #14 of 14
2/3/11 at 3:55pm
Quote:
Originally Posted by hihuq View Post

You guys are a lot more encouraging then my wife WAF increrases if I modify the dead vent as described here.

It's easier to ask for forgiveness than for permission
Reply
Reply
New Posts  All Forums:Forum Nav:
  Return Home

AVS Top Picks