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Old 01-04-2011, 07:24 PM   #31
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Manual D Friction Rate Worksheet


LoLLLL

Now thinking about it. My longest run consist of a 6" flex duct that runs and then connects to a reducer that splits from a 6" into two 4" flex runs. I found the EL for the reducer splitter at 70. But do I count both of the 4" flex runs including the ceiling boxes. Or I only use one of the 4" flex run on the split ?


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Old 01-04-2011, 07:35 PM   #32
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Just 1 of the 4" runs. The one that would/will be the TEL run. may have to do each separately to see which one is longer.
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Old 01-04-2011, 07:48 PM   #33
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Manual D Friction Rate Worksheet


.

Ok cool, I understand. Thanks so much for all your help Beenthere. I will keep u posted on my results.

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Old 01-10-2011, 06:04 PM   #34
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Manual D Friction Rate Worksheet


Hey beenthere

here's the break down of my FR.

asp .12 x 100 / 252 tel = 0.04761905

so i rounded it up to 0.05 fr. I havent added the media filter into the equation as I havent decided yet if I am goin to add it yet. For the media filter can the air
handler sit directly on top of the media filter box in which then the media filter box is sitting now on the stand or it usually goes under the metal stand the air handler is sitting on!
If it goes under the stand will I be require to move up the stand so i get more clearance from the floor up for the return.

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Old 01-10-2011, 07:06 PM   #35
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Manual D Friction Rate Worksheet


The air handler can sit directly on top of the media filter housing/box.

Your FR sounds much better now.
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Old 01-10-2011, 09:22 PM   #36
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Manual D Friction Rate Worksheet


awesome. Ya I am so happy I finally found the Friction rate. I'll post pics of my install later.

thanks again beenthere
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Old 01-10-2011, 09:26 PM   #37
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Beenthere

One more question. When I choose a media filter box. I should pick the size of the bottom return of the air handler? I got a 20x20 opening. So I should get a media filter box that is sized 20x20?
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Old 01-11-2011, 04:17 AM   #38
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Media filter should be sized for the CFM. If the filter box is the size of the opening. It works out good. if it isn't, then another install method needs to be used. Sometimes a transition from the filter box to the air handler.
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Old 01-11-2011, 05:36 PM   #39
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Ok, cool.

Ya, I am going to try to find a media box that will directly fit under the air handler. That way I won't require a transition. Thanks again

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