Hvac Ducts On Roof

Forum home ca modern forums home maintenance hotline how to conceal hvac duct work on a flat roof.

Hvac ducts on roof.

The average cost for a duct and vent professional is 100. The price of a duct and vent professional can vary depending on your area. Lambro rigiflex 4 in x 96 in aluminum semi rigid flexible duct. The official recommendation from the adc is that flex ducts should sag no more than 1 2 per foot of length between supports.

The insulation should provide the clue you need. This is my exact climate we do have to run ducts on the roof all the time. Item 1790033 model 1790033. 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.

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. We purchased an eichler style house few years ago and the contractor moved the hvac duct work to the roof. 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. The supports need to be at the manufacturer s recommended spacing but no longer than 4 maximum.

May 27 2012. 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. Duct temp gain when inside doghouse with r30 is less than 5 at 50. 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.

You put the ducts in the envelope of the house and it helps it keep cool costello says. Round pipe can be used as a main trunk line or branch line as well as in return air situations. The straps that hold up the flex duct need to be no less than 1 5 wide. Not only does the duct displace insulation it s also right up against the roof deck.

Choose from a full line of sheet metal ducts including elbow ducts ductwork tools duct wyes flexibles galvanized ducts and reducer ducts. How to conceal hvac duct work on a flat roof. It maintains the most efficient characteristics for airflow and is common throughout the country. American made roof vents wall vents dryer vents duct dampers storm collars and more for commercial and residential use.