How to cut connect and install flex duct, flexible pipe for heating & air conditioning ventilation

In this tutorial I am happy to show you how to properly install flexible duct to a register can for all you heating & air conditioning ventilation do it yourself ‘ers out there. Subscribe to my channel comment, and ask questions. I would love to help!

The Sheet Metal Kid channel consists of how to’s and tutorials on how to use HVAC and sheet metal hand tools as well as how to install duct and ventilation correctly. We are a highly interactive channel to help you with all your sheet metal and ducting installation.

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  1. I saw you have a local 104 shirt on. I'm also part of that local. district 1. what company do you work for. I have actually ordered duct from you to support our industry and entrepreneurs like yourself. keep doing what your doing brother. I was taught to zip tie, then tape then zip.tie outer jacket. I'm sure it's different everywhere but here in sac that's what we do

  2. Let me update you on your practices. One would think flex duct connected with a panduit strap only is a sealed joint you would be wrong. In an attic duct leakage is a huge waster of energy especially through the return flex. LEED or Leadership in Energy Efficiency Design requires mastic on the collar where it connects to the register box or boot, the boot sealed to the sheet rock, and when installing flex mastic is spread on the collar the flex is slid into place over the mastic, a strap is installed. More mastic is spread on the outside sealing the end of the flex to the collar. The flex insulation is then pulled down and held from lifting off with tape or by some other means. Never strap over the insulation as it will be compressed and made ineffective.

    On Platinum LEED installations we spray foam over the finished connection sealing the flex to the boot and the boot to the sheet rock. Yes this costs more, but for instance it is common place to reduce the capacity of the system by up to one ton. We recently took out 8 tons and put in 4 tons just by sealing and insulating the new duct system to LEED standards. Would you think the homeowner would get a payback? We have reduced electrical hvac bills by 80% in doing so this with no other changes to the property envelope.

  3. very helpful video. I have a question though, I live in FL and trying to partition my garage so I have a small office. the air handler is in the garage, so I was hoping to install a vent right on top of the handler, but I can't​ install a rough-in box. any thoughts ? this part of the insulation is big, solid, and square- not round and soft.

  4. Thanks for the help! I purchased an adjustable 90 degree elbow and applied the techniques that you taught. My home is nice and cool and it's 90 degrees outside. Thanks & God Bless!!!

  5. Hi mate
    can you tell me why my heating duct outlet
    below the house
    is connected to a small ball size device in between the ducts is making a ticking sound lately never stops ticking
    please advise the problem?
    thanks

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