On Fri, 8 Apr 2011 20:09:03 -0500, Sqwertz
wrote:
That's the cheapo/crapo method, engineered on site as they go. A much
better and only slightly more expensive method is to use double walled
sheet metal plenums with insulating material filling the void, each
section bolted to the next through a formed flange with a rubber
gasket that minimizes vibration.... that's how the AC duct work was
made at my last house... measurements were taken and all sections
stock sizes and a few fabricated at their shop... took less than a day
for the install... which is why it cost only like 20% more, much less
on site labor and most of the sections were labor free factory stock
sizes. When I moved here the hillybillys used your fercocktah toys r
us duct taping method, took them most of a week and not nearly so nice
a job.