Round Sheet Metal Ductwork Should Be

The 4 ply spiral lock seams of spiral duct create a product that is stronger than traditional welded seam round ducts of the same gauge.

Round sheet metal ductwork should be.

Let s start with sheet metal since it has been around longer. The fiberglass in some ducts can deteriorate with time and will eventually release fiberglass particles into the air which might affect the health of the residents. Sheet metal ducts are less likely to incur dangerous mold and growths because their surfaces are non porous and smooth. It collects dust and is almost impossible to clean.

Flexible duct can degrade over time. Master flow 4 in. When properly installed sheet metal systems are robust and can provide many years of service. Set your store to see local availability add to cart.

Ducts sheet metal gauges sheet metal gauges used in ductwork. Bob s not a fan of flexible heating ductwork. Above ground duct systems shall conform to the following. 26 gauge round metal duct pipe model 26cp4x24 5 67 5 67.

Air moves easily in metal duct systems with less friction loss. M1601 1 1 above ground duct systems. 2 inches wide and spaced no further than every 5 feet. One end of each piece is crimped for easy fitting of consecutive joints or to sheet metal fittings and flexible duct.

Galvanized sheet metal ducts from the duct shop s hvac ductwork is manufactured from high quality galvanized steel in 3 foot lengths for easy handling. There s no question that flexible duct is easier to install than metal ductwork but consider this. 20 in x 25 in x 16 in duct square to round. Sheet metal duct pipe fittings page 1 of 211.

Minimum thickness of metal duct material shall be as listed in table m1601 1 1 2. Sheet metal made of galvanized steel or aluminum is fabricated into round or rectangular duct for transporting air. When hanging flexible duct the hanging material should be at least. Round metal duct pipe galvanized sheet metal duct work 24 metal ducts 16 inch hvac 3 inch rigid pipe.

Engineering toolbox resources tools and basic information for engineering and design of technical applications. Galvanized steel shall conform to astm a 653. The round profile greater flow efficiencies than rectangular ducts. Because round ducts are inherently stronger than rectangular profiles they can be lighter metal gauges and can be installed in longer spans.

To see availability for this product personlog in or get online access. Flexible duct needs to be larger than pipes to allow the same amount of airflow. Underwriters laboratories standard 181 a covers. 30 ga insulated box.