Hvac Ducts On Roof

1 reply august 23 2014 10 40am sarah.

Hvac ducts on roof.

To hire a duct and vent professional to install or remove your ducts and vents you are likely to spend between 80 and 150 total. The absolute best way to run the ductwork above the roof is to use r8 insulation on the ductwork internal and build a doghouse outside the ductwork with minimum r30 insulation on sides and top of duct. How to conceal hvac duct work on a flat roof. It maintains the most efficient characteristics for airflow and is common throughout the country.

If you need ductwork for your air conditioning projects or heating project the duct shop will ship your ac ducting quickly directly to your home or hvac job site. Master flow metal pipe is available in a master flow metal pipe is available in a variety of common lengths diameters and gauges to help make your next hvac project a success. Round pipe can be used as a main trunk line or branch line as well as in return air situations. You put the ducts in the envelope of the house and it helps it keep cool costello says.

Lambro rigiflex 4 in x 96 in aluminum semi rigid flexible duct. Choose from a full line of sheet metal ducts including elbow ducts ductwork tools duct wyes flexibles galvanized ducts and reducer ducts. The supports need to be at the manufacturer s recommended spacing but no longer than 4 maximum. The insulation should provide the clue you need.

Duct temp gain when inside doghouse with r30 is less than 5 at 50. Not only does the duct displace insulation it s also right up against the roof deck. Item 1790033 model 1790033. The price of a duct and vent professional can vary depending on your area.

In sweltering cities where temperatures often blow past 110 degrees installing ductwork on roofs and piping cool air through the oven like atmosphere doesn t make sense in terms of energy efficiency. Forum home ca modern forums home maintenance hotline how to conceal hvac duct work on a flat roof. We purchased an eichler style house few years ago and the contractor moved the hvac duct work to the roof. The straps that hold up the flex duct need to be no less than 1 5 wide.

May 27 2012. American made roof vents wall vents dryer vents duct dampers storm collars and more for commercial and residential use. The official recommendation from the adc is that flex ducts should sag no more than 1 2 per foot of length between supports. This is my exact climate we do have to run ducts on the roof all the time.