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Old 02-22-2013, 10:48 AM   #1
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Default Basement-Natural Gas Rig

Basement is as follows:

3-10" 75,000 rated btu Banjo Burners converted to NG (which brings btu down to a rating of 60,000 btu)

Trunk Duct Fabricated Hood with a Hurricane 435 CFM Inline Fan
CO detector
4 Basement windows one on each exterior wall of the basement (all opened)

I will post pics but I believe I have everything covered with regards to venting and fresh air (plus a CO detector just in case of course)

So now on to my question...I need a TRUE EXPERT HVAC TECH to tell me if I have taken sufficient safety measures? No offense to all of you IMHO guys, but I need a non-humble opinion based on facts as I have read through a litany of FOR and AGAINST natural gas basement setups and most seem to be "IMHO".

I went with logic on this build and would just like a warm and fuzzy, "everything looks good" from a true expert in the HVAC field with some data to back it up.

A very special THANK YOU to anyone who can help with factual feedback.

Thanks for reading all!!!



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Old 02-22-2013, 10:54 AM   #2
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Here are the pics





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Old 02-22-2013, 10:55 AM   #3
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.....and the rest.....











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Old 02-22-2013, 01:07 PM   #4
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Quote:
Originally Posted by SuckaMooHudda View Post
I went with logic on this build and would just like a warm and fuzzy, "everything looks good" from a true expert in the HVAC field with some data to back it up.

A very special THANK YOU to anyone who can help with factual feedback.

Thanks for reading all!!!
I recommend this link. It's a calculator for range hood CFM's.

http://www.vent4less.com/78.html?m9ost=determine-range-hood-cfm-in-3-easy-steps

I also thought it pertinent to include the web site disclaimer.

"Be aware that building codes and local regulations differ from region to region and they also may change over time. We assume no liability for omissions, errors or the outcome of any home improvement project. Exercise reasonable caution and follow your current codes and regulations. When in doubt consult a licensed ventilation contractor in your area. "

And, YES, I am an HVAC guy who works in a hospital.
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Old 02-22-2013, 06:36 PM   #5
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Now that I've had some coffee to mellow my mood.

The build looks great and I wish I had the time, effort, and space to be more high tech.

Didn't see exactly where the CO sensor is, but pay attention to it. CO can KILL!!!

Happy brewing!!!

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Old 02-22-2013, 09:58 PM   #6
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Rule of thumb for an island hood is 100 cfm per sq ft hood opening. 50 cfm if the hood is against a wall. Now here's the thing. The guy who made the fan says it will move 435 cfm but at what static pressure? Somewhere in the paperwork there should be a static pressure chart for the fan. The next thing is that the small round duct you installed probably will lower the fan cfm because of the restriction (static pressure). For instance, at .1 static a 6" pipe can deal with 100 cfm, an 8" 200 cfm a 10" about 500. So, depending on what the manufacturer says the static is at 435, the diameter of the pipe will have to match it. Take a look at the Grainger catalog for exhaust fans for a hood. Now, for combustion air for the burners, 1 sq in for every 1000 btu. You have plenty of windows for makeup air for the hood and combustion air for the burners as long as they open.

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Old 02-23-2013, 05:00 AM   #7
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Where is your fresh air coming from? Ducting out with an adequate volume is great, but unless you're pumping in adequate air, you're not going to have an effective "closed system."

That is IMHO, but I think it's important, due to the principle of convection.

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Old 02-23-2013, 06:32 AM   #8
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Thanks for the response....sincerely. The disclaimer above is exactly why I am asking specific people on homebrewtalk.com for some information.... my local HVAC expert doesn't seem to think I need too much and that my 435 CFM fan is more than sufficient for the amount of space, number of windows and BTUs. Apparently i am being paranoid. Funny how potential death can do that to a fella. "Exercise caution " and " when in doubt consult a local ventilation contractor". What if your local ventilation contractor is the guy that got a D- in HVAC class? Maybe I should buy some Canaries? ;-)

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Old 02-23-2013, 06:39 AM   #9
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The fan is actually made for 6" duct in and out so i assume the Mfr has taken that into consideration in their rating???? I would hope....

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Old 02-23-2013, 06:49 AM   #10
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Fresh air is only coming from the four windows. 2 are quite large and have ladders set up as escape wells with openings of approximately 4 feet by 4 feet. The other 2 are approximately 30 inches by 40 inches. One window per each exterior wall. I am gonna draw a sketch after i do an accurate measure of sq' so you all know exactly what I am talking about.



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