Building Supplies › Master Flow

Master Flow 12 in. W X 12 in. L White Plastic Wall Louver

One-piece integral louvered resin construction for exceptional strength and eliminates the need for a screen. Used for intake or exhaust venting. For flush or recessed installation. more

Master Flow 7 in. Round Appliance Vent Kit

Master Flow 7 in. Round Appliance Vent Kit more

Master Flow 3-1/4 in. x 10 in. Rectangular Appliance Wall Vent

The Master Flow 3-1/4 in. x 10 in. Rectangular Appliance Wall Vent is designed to fit most range hoods that will be vented outside through a wall. This heavy-duty wall vent is made of zinc-coated galvanized steel. This wall vent features a spring... more

Master Flow 10 in. x 4 in. to 6 in. 90-Degree Register Box

The Master Flow 10 in. x 4 in. x 6 in. 90°Register Box creates a right-angle transition from round pipe or insulated flexible duct to an air register. This box is made of galvanized steel. It can be installed with sheet metal screws. It is suitable... more

Master Flow 10 in. Round Duct Cap

Master Flow Duct Caps are used to terminate round pipe runs in HVAC systems. An assortment of duct caps size is available to match the round pipe. Can be used for existing and new construction. Sturdy galvanized steel construction Always seal seams... more

Master Flow 4 in. H X 18 in. W X 18.5 in. L Black Resin Roof Vent

Master Flow resin square-top utility vent is designed for attic ventilation. The fully enclosed hood deters rodent and insect infiltration and leaf and pine needle clogging. more

Master Flow 4 in. x 4 in. x 4 in. Wye Y4X4X4 - New

The Master Flow 4 in. x 4 in. x 4 in. Wyes are made of 30-Gauge galvanized steel. They are used primarily to transition from 1 pipe to 2 pipes in heating and air conditioning applications. They are easily installed with sheet metal screws (not... more

Master Flow 60 sq. ft. R-8 Insulated Duct Wrap

Use this Master Flow R-8.0 60 sq. ft. Duct Warp Insulation to reduce condensation in your duct system. It will also help to absorb noise from your ducting system. Use of this duct warp should help improve temperature efficiency of your duct system.... more

Master Flow 18 in. W X 24 in. L White Aluminum Wall Louver

One-piece integral louvered aluminum construction for exceptional strength and eliminates the need for a screen. Used for intake or exhaust venting. For flush or recessed installation. more

Master Flow 12 in. x 12 in. to 8 in. Ceiling Register Box

The Master Flow 12 in. x 12 in. x 8 in. Ceiling Register Box is made of 30-Gauge galvanized steel. It creates a transition from round pipe or insulated flexible duct to an air register or grille. The ceiling register box can be installed with sheet... more

Master Flow WVA4BL Round Wall Vent 4 Black Each

Highlights: Color : Black Diameter: 4 inch Material: galvanized steel. Type: Round Usage: For Outside Sidewall Termination of Kitchen Bath Fans Range Hoods Microwave Venting or Dryer Exhausts more

Master Flow 8 in. W X 8 in. L White Plastic Wall Louver

Master Flow 8 in. W X 8 in. L White Plastic Wall Louver Master Flow 8 in. W X 8 in. L White Plastic Wall Louver more

Master Flow EAC16X8W Aluminum Undereve Vent White 16 x 8 Each

Highlights : Size: 16 x 8 White Finish Aluminum Screened Surface mount Corrosion resistant 16 x 8 vents have 65 sq. ins. of net free area All purpose intake ventilation prepunched nail holes more

Master Flow 12 in. W X 12 in. L White Aluminum Wall Louver

One-piece integral louvered aluminum construction for exceptional strength and eliminates the need for a screen. Used for intake or exhaust venting. For flush or recessed installation. more

2Pc Master Flow 4 in. H X 4 in. W X 12 in. L Brown Resin Undereave Vent

Master Flow offers a full line of easy-to-install options for providing critical intake ventilation at the soffit or undereave portion of the roof. more

2Pc Master Flow 4 in. H X 4 in. W X 12 in. L White Resin Undereave Vent

Master Flow offers a full line of easy-to-install options for providing critical intake ventilation at the soffit or undereave portion of the roof. more

Master Flow Powder-Coated Rectangle White Aluminum Undereave Vent 8 in. H x 16 in. L x 16 in. W

Master Flow Under Eave Aluminum Vent is the perfect solution for cool fresh air circulating in your attic. The easy-install kit of this Master Flow under eave vent includes a poly mesh screen to prevent animals from crawling in. This aluminum under... more

Master Flow 4 in. H X 16 in. W X 16 in. L Galvanized Mill Aluminum Undereave Vent

Master Flow offers a full line of easy-to-install options for providing critical intake ventilation at the soffit or undereave portion of the roof. more

Master Flow 7 in. Starting Collar Take Off

The Master Flow 7 in. Starting Collar is suitable for most HVAC applications. It provides a transition from a flat surface like a plenum (made from metal ductboard or insulated) to round pipe or insulated flexible duct. It can be used with ductboard an... more

Master Flow 16 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket

The Master Flow 16 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket is used in standard Heating and Air Conditioning (HVAC) systems and some venting applications. The duct has R6 insulation which contains 33% more insulation than the standard R4.2... more

Master Flow 10 in. Air-Tite Take-Off with Damper ATTOD10

The Master Flow Air-Tite 10 in. Take-Off provides an airtight seal when connecting insulated flexible duct or round pipe to a flat surface. This take-off can be used to redirect air from any side of the plenum or to transition from a rectangular pipe... more

Master Flow 10 in. Starting Collar

The Master Flow 10 in. Starting Collar is suitable for most HVAC applications. It provides a transition from a flat surface like a plenum (made from metal duct board or insulated) to round pipe or insulated flexible duct. It can be used with duct board... more

Master Flow 144 sq. in. NFA Galvanized Steel Static Dome Roof Vent Weatherwood

The Master Flow High Capacity Dome Roof Vent is designed for attic ventilation. The Heavy-duty internal screen helps deter animals and birds. Each High Capacity Dome roof vent offers a full 144 in. of net free ventilating area (NFA). Non-powered static... more

Master Flow NU26CP3X24-5PK 3 in. x 24 in. 26-Gauge Round Duct Pipe

Heavy Gauge 3 in. Pipe is used to vent boilers furnaces and hot water heaters. Available in a variety of common lengths diameters and gauges to help make your next HVAC project a success. A simple snap lock design and sturdy galvanized steel... more

Master Flow 4 in. Fresh Air Vent FAV4 - New

Master Flow Fresh Air Vents come with a built-in screen to prevent bird entry. They can be used to vent a combustion system or anywhere fresh air intake is needed. Constructed of galvanized steel. Built-in bird screen Sturdy galvanized steel... more

Master Flow NU28CP4X24 4 in. x 24 in. 28-Gauge Round Duct Pipe

Heavy Gauge 4 in. Pipe is used to vent boilers furnaces and hot water heaters. Available in a variety of common lengths diameters and gauges to help make your next HVAC project a success. A simple snap lock design and sturdy galvanized steel... more

Master Flow NU26CP7X24 7 in. x 24 in. 26-Gauge Round Duct Pipe

Heavy Gauge 7 in. Pipe is used to vent boilers furnaces and hot water heaters. Available in a variety of common lengths diameters and gauges to help make your next HVAC project a success. A simple snap lock design and sturdy galvanized steel... more

Master Flow NU26CP4X24-5PK 4 in. x 24 in. 26-Gauge Round Duct Pipe

Heavy Gauge 4 in. Pipe is used to vent boilers furnaces and hot water heaters. Available in a variety of common lengths diameters and gauges to help make your next HVAC project a success. A simple snap lock design and sturdy galvanized steel... more

Master Flow 4 in. Round Duct Cap

The Master Flow 4 in. Round Duct Cap also called a tee-cap or clean-out plug is constructed of galvanized steel for durability. The duct cap is used to terminate or block off a rectangular duct run in HVAC systems. It can be installed with sheet metal... more

Master Flow BDCP4X60 4 in. x 5 ft. Beaded Metal Duct Pipe

Master Flow Beaded Metal Pipe is available to help make your next HVAC project a success. Beaded pipe can be used as a main trunk line or branch line as well as in return air situations. It maintains the most efficient characteristics for airflow and... more

Master Flow 6 in. Starting Collar Take Off DSCF6 - New

The Master Flow 6 in. Starting Collar is suitable for most HVAC applications. It provides a transition from a flat surface like a plenum (made from metal ductboard or insulated) to round pipe or insulated flexible duct. It can be used with ductboard an... more

Master Flow 12 in. x 2-1/4 in. to 6 in. Universal Register Box

This Master Flow 12 in. W x 2-1/4 in. L x 6 in. Dia Universal Register Box is ideal for creating a straight in-line transition from a round pipe to an air register. Insulate ductwork for system efficiency and comfort. Galvanized steel construction... more

Master Flow 8 in. Starting Collar Take Off - New

The Master Flow 8 in. Starting Collar is suitable for most HVAC applications. It provides a transition from a flat surface like a plenum (made from metal ductboard or insulated) to round pipe or insulated flexible duct. It can be used with ductboard an... more

Master Flow 4 in. Storm Collar

This Master Flow 4 in. Storm Collar is made of galvanized steel and installs on a variety of roof pitches with sheet-metal screws. It helps protect against rain snow and debris. Adjustable for various roof pitches. Sturdy galvanized steel construction... more

Master Flow LSC8 8 in. Starting Collar

The Master Flow 8 in. Starting Collar is suitable for most HVAC applications. It provides a transition from a flat surface like a plenum (made from metal duct board or insulated) to round pipe or insulated flexible duct. It can be used with duct board... more

Master Flow 9 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket F6IFD9X300

The Master Flow 9 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket is used in standard Heating and Air Conditioning (HVAC) systems and some venting applications. The duct has R6 insulation which contains 33% more insulation than the standard R4.2... more

GAF Master Flow 60 sq. in. Net Free Area Aluminum Slant Back Roof Louver Vent in Brown (FBC) - (8 Pack)

The GAF Master Flow Aluminum Slant Back Roof Louver is designed for attic ventilation. The fully enclosed hood deters rodent and insect infiltration and leaf and pine needle clogging. The aluminum slant back roof louver is an excellent choice against... more