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Post subject:Kool Duct
 Posted: Feb 19, 2007 - 02:49 AM #5987
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Joined: Feb 20, 2004
Posts: 12
Location: Stamford, CT
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| I just started working for a company that uses a product called Kool Duct. It's made by Knauf and is similar to duct board but it's not made from fiberglass. It's more like a highly compressed foam and it has foil on both sides. From what I've read it seems to be popular in Europe. I know we're the only shop in this area that uses it. I was just wondering if any of you out there have used it or have any comments on it. |
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Post subject:RE: Kool Duct
Posted: Jan 01, 2008 - 10:29 AM #7044
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Joined: Jan 01, 2008
Posts: 24
Location: nz
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Hi, my company used it on quite a few jobs over the years, instead of sheet metal ducting. In theory Koolduct sounds great...quick and easy to cut and make and light to install. We were one of the first companies to use it in NZ.
I've made ducting out of sheetmetal for over twenty years. The things to watch out for with Koolduct are: getting customers/consultants to accept Koolduct over sheetmetal...some won't!! Koolduct damages easily onsite...you can kick a hole in it easily so other site contractors can damage it. It is heavier than you think so will need more hanging supports. Criminals can cut into Koolduct easily if it is used as roof duct. Even though the seams are glued and sealed with sealant...they can break apart making the duct flex with no strength.
We had to learn though trial and error, so this info should help. |
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Post subject:Koolduct
Posted: Feb 02, 2008 - 03:05 AM #7183
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Joined: Feb 02, 2008
Posts: 1
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| We have been using KoolDuct since 2004...and have done hundreds of jobs utilizing KoolDuct. KoolDuct, in our experience, is very light, high R-value, tremendously air tight, and when properly assembled...will withstand medium air pressure (4" water column) with virtually no air leakage. KoolDuct meets the current energy code in almost any area where the energy code is enforced. The 2006 IECC (International Energy Conservation Code) will drive more contractors to KoolDuct as a solution to meet the higher energy savings requirements. Ohio just began enforcing this code on 1/1/2008. When we first started using KoolDuct...almost all fittings had to cut by hand. We now use a KD3z CNC machine that allows us to cut the KoolDuct panel at a high speed much like a plasma does for sheet metal. The website for the KD3z is www.gomech.com I disagree with the previous comment...as we find KoolDuct to be quite durable. Best of all...KoolDuct does not absorb water during installation like lined or wrapped sheet metal. |
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Post subject:Koolduct
Posted: Feb 02, 2008 - 07:06 AM #7185
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Joined: Jan 01, 2008
Posts: 24
Location: nz
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Howdy,
I think the CNC high-speed Koolduct cutter on www.gomech.com is great! We had nothing like this when we started using Koolduct in 1994. Back then Koolduct was new to the market place. We used the same data to promote it also. We slowly stopped using it around 1998 as the consultants/customers just wanted sheet metal and the sheets of Koolduct were getting too expensive to import to NZ. Our sheet metal competition wouldn't buy into Koolduct either so they were still selling sheet metal.
I'm glad to see that it is being used more these days. I liked working with it. No internal insulation...easy to make...not noisy like sheet metal when hit by a hammer...
Thanks for the feedback. |
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Post subject:KOOLDUCT ROLLERS
Posted: Feb 04, 2008 - 08:51 AM #7186
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Joined: Jan 01, 2008
Posts: 24
Location: nz
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Koolduct manufactureres:
I've studied quite a few companies on the Internet that use Kooduct all over the world and have noticed they still use the manual "squash" down hand bender to create curves on Koolduct for bends, etc. I always thought this was a slow way.
What about converting 4ft sheet metal rollers. Take the back roller off leaving only the two front rollers. Weld 1/2 inch diameter x 4ft long rods around the circumference of the top roller to produce the necessary forming indents which "shrink" the Koolduct upwards. Leave the bottom roller flat as not to mark the Koolduct sheet. Adjust the rollers apart to suit the Koolduct panel thickness and "Eureka"...motorized Koolduct bender!
If these rollers already exist...ignore this Post.
Feedback please... |
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Post subject:koolduct
Posted: Mar 18, 2008 - 10:51 PM #7402
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Joined: Mar 18, 2008
Posts: 1
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| I have been working with koolduct since 2005 and its been explosive in the market here in FLORIDA. Now the engineers are asking for it in the specs,Therefore its good to have access to the product because you will get the work.I am doing backflow preventer boxes, high end housing and commercial jobs.I am very happy working with this product as my back dont hurt at the end of the day. |
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Post subject:KOOLDUCT ROLLERS
Posted: Mar 20, 2008 - 05:34 AM #7406
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Power User
Joined: Nov 13, 2007
Posts: 114
Location: Omaha, NE
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sheetysteve wrote:
What about converting 4ft sheet metal rollers. Take the back roller off leaving only the two front rollers. Weld 1/2 inch diameter x 4ft long rods around the circumference of the top roller to produce the necessary forming indents which "shrink" the Koolduct upwards. Leave the bottom roller flat as not to mark the Koolduct sheet. Adjust the rollers apart to suit the Koolduct panel thickness and "Eureka"...motorized Koolduct bender!
Key phrase should be added to your post... PATENT PENDING |
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Go Huskers!
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Post subject:Koolduct motorised bender
Posted: Mar 27, 2008 - 07:10 AM #7418
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Joined: Jan 01, 2008
Posts: 24
Location: nz
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Hey thanks,
anyone can use this idea and go for it...I hope it works.
thanks |
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Post subject:RE: Kool Duct
Posted: Apr 01, 2008 - 11:01 PM #7439
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Joined: Feb 20, 2004
Posts: 12
Location: Stamford, CT
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| Our shop just recently purchased the KD3z CNC machine for Kool Duct fabrication. We can pump out the Kool Duct in half the time it took before when we cut everything by hand. We still use sheet metal regularly. We incorporate both on the job. There are spots where only metal duct will get the job done. I still haven't seen or read about Kool Duct in Snips or any other trade related publications. With all the talk of 'green building' and LEED it will be interesting to hear if it catches on in other areas of the country. |
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Post subject:koolduct
Posted: Jul 11, 2008 - 09:24 AM #7728
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Joined: Jan 01, 2008
Posts: 24
Location: nz
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I've used it for years and it is "too" soft!!! It marks to easily. Have you found this out yet?? Have you made an acute square double off-set. The angles for cutting the Koolduct edges are "tricky". Round Koolduct is "hard". Gluing them together is "hard". Other contractors onsite can sit on Koolduct to have "smoko" and put holes in it with their "srew driver"...what do you think????
thanks |
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