BD image Pottorff's NEW High Performing Louvers Feature Drainable Performance at an Economical Price!

In order to improve performance for you and your clients, we have redesigned our non-drainable louvers. These louvers now have drainable heads and jambs meaning increased performance at no additional cost. 

• Best-in-Class Water Penetration Performance
• Get Drainable Performance at a Non-Drainable Price.

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Latest News


NEW End Plenum adds Flexibility when installing our CFD-521-90 Ceiling Radiation Damper

Our new end boot option gives added adjustibility to the installer to allow for flex duct connection without crimping or turning when space is tight to the truss space. The addition of this boot to our CFD-521-90 will give you another option when choosing the right application for your jobs.


NEW CAR-T Constant Airflow Regulator with Transition

Pottorff is pleased to announce the release of our model CAR-T to complement our CAR constant airflow regulator. The CAR-T offers the CAR factory installed in a square to round or rectangular to round transition. This labor saver can help installers save time by offering an easy way to install round constant airflow regulators in a square or rectangular duct.

Model CAR-T constant airflow regulator with transition is designed to save a significant amount of money and energy by precisely controlling airflow to balance HVAC systems without the need for electrical or pneumatic controls and sensors.

CAR-T Catalog Page

CAR-T Installation Instruction

Pottorff Releases the PI-10 Indicator Switch Package for Curtain Type Fire Dampers

Our PI-10 switch package can be used to signal an alarm or fore control system to indicate blade closure on VFD dampers. The PI-10 can be used on both static and dynamic, 1-1/2 hour rated and 3-hour rated dampers. It can be ordered factory mounted, or loose for field installation as an option on our VFD models. It can also be ordered as a stand-alone model for retrofitting installed VFD dampers that need this blade indication.

Pottorff Releases the CAR-FD Constant Airflow Regulator with Fire Damper

Our model CAR-FD can be ordered with a static or dynamic curtain type fore damper that can be installed in fore rated walls rated up to two hours. The CAR-FD fire damper employs curtain style blades for point-of-origin control of fire in static or dynamic HVAC systems.


Introducing Expanded Modulating Actuator Options for Combination Fire/Smoke Dampers

The expanded Modulating Actuator options will allow our UL rated airfoil blade fire/smoke dampers to act as both life safety and air control dampers.

Pottorff is pleased to announce expanded modulating actuator options for our out-of-partition and horizontally mounted steel airfoil combination fire/smoke dampers. The Belimo FSAFB24-SR(S) modulating actuator can now be selected as an option on Pottorff's horizontally mounted  FSD-151 and FSD-152 dampers in assemblies up to 120" x 48" and on FSD-151-OP and FSD-152-OP dampers up to 36" x 24".

Pottorff Announces NEW Concealed Motor Louvers

Pottorff's NEW concealed motor louvers are designed to be used in any situation where our standard operable and combination louvers would be used, but where access to the actuator and hardware needs to be controlled or restricted.  The actuator will be concealed in the sill of the louver, and can be accessed internally (by default), externally, or both.


Increased Performance for Pottorff Airfoil Blade Fire/Smoke and Smoke Dampers!

Pottorff is pleased to announce increased performance ratings for our airfoil blade smoke and combination fire/smoke dampers. These dampers are now UL approved for Class 1 leakage at 4000 fpm and 8" static pressure at a maximum assembly size of 96" x 48". This assembly size makes these dampers the largest in the industry. These ratings cover combination fire/smoke dampers rated to 1-1/2 to 3 hours and Class 1 or Class 2 leakage as well as smoke dampers rated to Class 1 or Class 2.

• Maximum Dynamic Closure Velocity: 4000 fpm
• Maximum UL 555S Rated Pressure: 8 in. wg.
• Class 1 and Class 2 UL 555S Rated Leakage
• AMCA Certified for Air Performance
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Pottorff's EOJ-690 Operable Louver Featured In The April Edition of The ASHRAE Journal

Our EOJ-690 high performing louver features 90 degree operable J-blades that range from closed to fully open and a drainable head frame. This results in a louver that protects openings from water penetration, while simultaneously providing a high free area product. A cost-saving advantage of high free area means that more air can enter into a smaller wall opening. This louver is ideal for warehouses or distribution type projects, where maximum airflow is required.

High Free Area: 68.5%
AMCA Certified for AIr Performance

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Our new CAR – Constant Airflow Regulator – is designed to save time and money by precisely controlling airflow to balance HVAC systems without the need for electrical or pneumatic controls and sensors. A self-regulating aero-wing and spring piston design automatically adjust for variable duct pressures caused by building duct design, thermal stack effect, dust build up filters, and other varying building conditions.

• Economical – no need for electronic/pneumatic actuators or sensors
• Available in standard, low and high pressures
• Field adjustable with only a screwdriver
• Sizes from 3-10 inches

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Pottorff's Constant Airflow Regulator Featured in ASHRAE Journal

Pottorff’s new CAR Constant Airflow Regulator is featured in the March issue of the ASHRAE Journal. The CAR features precise control of indoor air quality and is available in sizes from 3-10 inches.

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Pottorff's ECD-545-MD Features Superior Performance and Streamlined Installation

Our ECD-545-MD severe duty louver is engineered and tested to withstand the extreme loads, debris impact and cyclic fatigue associated with the weather effects from hurricanes and tropical storms.

AMCA 540 (Enhanced) Listing
AMCA 550 listed (with CD-51 damper)
2017 Florida Building Code Pending
Texas Department of Insurance Listed

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Pottorff's Excellence in Air Management and Control Featured in January Issue of THE ASHRAE Journal

Our full-line of Louvers, Air Control Dampers, Fire and Smoke Dampers and Sound Control products is backed by our Industry Leading 5-year warranty.

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2019 Annual Pottorff Representative Principal Luncheon

Thank you to our representatives for a successful 90th Anniversary Luncheon and Awards Ceremony. This year’s event was held at the beautiful Commerce Club in Atlanta, Georgia. Over 120 of our reps viewed our recently and soon to be released products on the 49th floor of the club which overlooked Atlanta.

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Mark Saunders accepts role as Pottorff's VP of Sales and Marketing

We are pleased to announce the hiring of Mark Saunders as our new Vice President of Sales & Marketing. Mark brings 20+ years of sales and marketing leadership expertise with him including 8-1/2 years with Pottorff as our Western Regional Sales Manager, 8 years with Titus as Marketing Manager and Regional Sales Manager, and most recently as Director of Sales & Marketing for Ruskin. 

Pottorff's high-performing louvers featured In November issue of THE ASHRAE Journal.

Pottorff louvers are designed and tested in-house to our own high standards for performance and reliability. Our exacting requirements means that you can be assured that our louvers meet or exceed industry regulations and your project criteria. Choose the right louver every time with LIST, our Louver Information and Selection tool.

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Pottorff has article in the November issue of AMCA InMotion Magazine

In the AMCA InMotion supplement of the November ASHRAE Journal, our Product Manager, Doug Petty, has written an informative article on "Specifying and Sizing Louvers to Limit Water Penetration." Doug says, "Over the life of a building, few issues can be more vexing then water infiltration. Not only can it affect the performanc of mechanical components, if not addressed, it can damage drywall, ductwork, and other building materials, leading to long-term contaminaion issues, such as mold and rust. Repairs can be costly and intrusive. For these reasdons, it is important to design an HVAC system to prevent water penetration into vulnerable areas.
Read the entire article here.

Pottorff XAV-545 FEMA Grille now Classified as a UL Windstorm Rated Assembly

Our XAV-545 5-1/2" deep, inverted V-blade FEMA grille is now classified as a UL Windstorm Rated Assembly. This model meets National Storm Shelter standards and is designed in accordance with FEMA 361 and FEMA 321 guidelines for storm shelters and safe rooms. It is also ICC-2014 compliant and AMCA Certified for Water Penetration and Air Performance.

NEW Ceiling Radiation Dampers with Labor Saving Boot Rail Installation

Pottorff is pleased to announce the addition of the CFD-521-90 and CFD-521-NP90 to its Wood Truss Ceiling Radiation Damper line. These dampers are designed to be installed in wood truss applications, offering a 28 gauge steel outlet box with boot rail installations. The CFD-521-90 comes with a factory installed 90 degree plenum while the CFD-521-NP90 is designed to be installed with a field-installed steel plenum.

The boot rail installation allows for connection directly to the bottom of the wood trusses to reduce labor during installation, and can be used in designs that use resilient channel to connect the gypsum board to the trusses, or in designs where the gypsum is fastened directly to the wood trusses.

UL 555C Listing: R14603
CSFM Listing: 3226-0368:104

Pottorff Control Dampers now AMCA Certified Class 1A Air Leakage

Pottorff is excited to announce that our CD-45 and CD-46 steel airfoil blade control dampers are now AMCA Certified for Class 1A Air Leakage. These dampers are certified to Class 1A and Class 1 leakage up to 6 inches of static pressure which puts them in compliance with current increased environmental regulation.

Pottorff Announces New EFJ-937-MD Miami-Dade Louver

Our new EFJ-937-MD dual-module louver is engineered and tested to withstand the extreme loads, debris impact, and cyclic fatigue associated with the severe weather effects of hurricanes. It is approved for use in Miami-Dade and Brower counties, and is listed under the 2017 version of the Florida Building code. It is an ideal choice for those geographic areas, or anywhere along the Atlantic or Gulf coasts where protection against severe weather is required.

* Free area of 53.9%
* Miami-Dade Approved
* Florida Building Code Listed
* AMCA 540 (impact Resistant) Listed
* AMCA 550 (High Velocity Rain Resistant) Listed
* AMCA Certified for Water Penetration, Air Performance and Wind-Driven Rain

NEW CFD-521-ST - First Ceiling Radiation Damper Approved for Cold-Formed Steel

Pottorff is pleased to announce the addition of the CFD-521-ST to its product line. It employs butterfly blades for point-of-origin control of radiant heat in HVAC systems. Installed horizontally in the ceiling membrane of combustible roof-ceiling assemblies with fire resistance ratings up to and including 1 hour.

Pottorff's NEW PEV-445 Elevator Ventilation Penthouse

The PEV-445 extruded aluminum penthouse is designed for elevator shaft and gravity ventilation applications.  The PEV-445 includes an SD-151, Class 1 smoke dampers that fails open for smoke evacuation.

Pottorff's New EFJ-937-MD features in the July issue of The ASHRAE Journal

The EFJ-937-MD dual-module louver is engineered and tested to withstand extreme loads, debris impact, and cyclic fatigue associated with the severe weather effects of hurricanes. For installation, the EFJ-937-MD offers multiple options requiring minimal hardware and assembly time. The EFJ-937-MD is AMCA 540 and 550 listed, making it ideally suited for use in hurricane-prone and wind-borne debris regions per the International Building Code.

Pottorff's Fire and Fire/Smoke Dampers Featured in the July Issue of the ASHRAE Journal

Pottorff’s fire and combination fire/smoke dampers now feature a UL approved, 3-sided retaining angle installation which allows damper installations without the need to install retaining angles around all 4 sides of the damper. An excellent option when space is tight.

Louver and Damper Product Training Class Held for our Representatives

On May 9-10, Pottorff held a product training class for our representatives. As well as learning the basics on our louvers and dampers, attendees had a tour of our manufacturing plant and in-house testing laboratories. Thanks to all of our attendees for taking the time out of their busy schedules to come to Pottorff and take part in this valuable training.

Pottorff announces NEW Bubble-Tight Control Damper

The CD-95R is a bubble-tight industrial control damper designed for isolation and decontamination applications. Bubble tight dampers are designed to have the lowest leakage ratings possible. Typical applications include industrial processing plants, laboratories, clean rooms, pharmaceutical facilities, nuclear facilities, DOE facilities, and other applications that require extremely low leakage. The CD-95R is tested for bubble tight leakage ratings in accordance with AMCA 500-D up to 30 in. wg (7.5kPa). 

• Leakage: In accordance with AMCA-500D

• Maximum Pressure: 30 in.wg.

• Maximum Velocity: 6,500 fpm


3-Sided Angle Installation for Pottorff Fire and Fire/Smoke Dampers

This UL Approved Installation will allow installers to use firestop caulk on one side of the damper in lieu of a traditional retaining angle. This allows damper installations tight to the ceiling, floor, or a wall without the need to install retaining angles around all four sides of a damper.

Pottorff's Ceiling Radiation Dampers Featured in the March issue of the ASHRAE Journal

Our CFD-521-IP and NP are featured in the March ASHRAE Journal. We have increased the allowance for these ceiling radiation dampers to make room for supply grilles with opposed blade dampers. They can now be ordered with up to a 4" clearance to allow room for a 3-1/2" deep grille.

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XAV-545 FEMA Aluminum Grille now meets ICC-500-2014

Our XAV-545 5" deep, inverted V blade grille meets the International Code Council (ICC) and the National Storm Shelter (NSSA) standards for design and construction requirements for storm shelters that provide a safe refuge from storms that produce high winds, hurricanes and tornadoes. Designed in accordance with FEMA 361 and FEMA 320 guidelines.

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Pottorff announces addition of the RCS-15R Radial Blade Control Damper

Our new RCS-15R radial blade control damper offers an economical way to balance low pressure and velocity applications. This duct mounted damper has manual remote control cables that easily mount in the ductwork to allow adjustment in the face of diffusers. Available in diameters from 6” to 14”.

Pottorff announces addition of its new 90 degree operable louver - the EOJ-690

The EOJ-690 features 90 degree operable J-blades that range from the closed position to fully open. It also has a drainable head to aid in protecting openings from water penetration. it features a free area of 68.5%.

Expanded Size Ratings for Pottorff Airfoil Blade Fire and Fire/Smoke Dampers

We are pleased to announce expanded size ratings for our airfoil blade Fire and Combination Fire/Smoke Dampers. These dampers can now be ordered at a minimum height of 6” for installations where space is at a premium. The expanded size range will allow engineers to specify smaller duct heights to increase usable space between building stories.

Pottorff Ceiling Radiation Damper Clearance Allowance Increased

Pottorff has increased the allowance for our model CFD-521-IP and CFD-521-NP to make room for supply grilles with opposed blade dampers. These models can now be ordered with up to a 4” clearance to allow room for a 3-1/2” deep grille. This allows the option of using many additional steel grilles in wood truss floor/ceiling and roof/ceiling applications.

Pottorff Announces NEW Dual-Module Extreme Weather Louver

Our EFJ-937 dual-module louver features AMCA 550 performance while retaining the aesthetic appearance of horizontal J-blades. The interior features vertical chevron blades for superior resistance to wind-driven rain. Engineered and tested to withstand extreme loads, debris impact and cyclic fatigue associates with the severe weather effects of hurricanes.


• AMCA 540/550 Listed for High Velocity Rain Resistance and Impact Resistance

• AMCA Certified for Water Penetration, Air Performance and Wind-Driven Rain

• Free Area: 53.9%

Pottorff announces new Blast Suppression Damper - BC-550

Our new blast suppression damper BC-550 is designed and tested to provide protection against blasts and instantaneous pressure changes. It has been independently tested for blast pressures up to 15 psi which covers several United Facilities Criteria (UFC) and General Services Administration (GSA) Codes.

Maximum Blast Pressure: Up to 15 psi 415 in. wg. (103KPa) blast load
Maximum Velocity: Up to 4,000 fpm (20.3 m/s)
Temperature: Minimum: -400 F (-400C)
Maximum: 2500 F (1210C)

Pottorff Supplied Silencers and Industrial Dampers for the Alaskan Way Viaduct Replacement Program

As part of the replacement program, the viaduct is being replaced with a 1.7 mile tunnel. This allows the highway to remain open during construction. The tunneling machine known as Big Bertha began the tunnel in July 2013 and the tunnel was completed on April 4, 2017. It was fully dismantled on August 23, 2017. The video below shows the tunnel and Pottorff's installed dampers can be seen at the 1.50 mark.

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Pottorff's Blast Damper Featured in the November ASHRAE Journal

Our BC-550 blast suppression is featured in the November ASHRAE journal. This Damper is designed for protection agains blasts and instantaneous preassure changes. It has been independently tested for blast preassures up to 15 psi.

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Wilshire Grand Center - Los Angeles, California - Case Study

Pottorff supplied our EDF-445 drainable blade louver, FSD-141 and FSD-125R combination fire/smoke dampers and VFD-10D curtain blade fire damper for the Wilshire Grand Center in Los Angeles, California. This upscale, 73-story skyscraper is the tallest structure in the Los Angeles skyline features a hotel, cutting-edge restaurants and state-of-the-art office complex. This project won the 2014 American Architecture Award from the Chicago Atheneaum Museum or Architecture and Design.

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Pottorff Louvers featured in the September issue of the AMCA InMotion magazine

Our AMCA Certified and Listed louvers are featured in the AMCA InMotion supplement in the September issue of the ASHRAE Journal.

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Pottorff features our new Blast Damper and Industrial Control dampers in the July 2017 issue of the ASHRAE Journal

Our BC-550 Blast Suppression Damper is featured in the Capabilities section of The ASHRAE Journal. In this double ad, we also showcase our Triple-V blade CD-80 series dampers, Airfoil blade CD-90 series dampers and TD-90 tunnel transit dampers.

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Pottorff introduces our updated UL Life Safety brochure

Our expanded and updated UL Life Safety brochure features a quick selection guide, updated information on our fire, smoke and combination dampers, overview of our in-house testing facility, damper options and accessories and overview of our I503 installation.

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Pottorff Launches NEW 4" Exhaust Louver

The EFE-430-HP extruded aluminum louver is designed to protect exhaust openings in exterior walls. The EFE-430-HP incorporates a drainable head and drainable jambs with low profile exhaust blades.

Pottorff Launches NEW 4" Intake-Exhaust Louver

The EEI-430 louver is designed to protect air intake and exhaust openings in exterior walls. Separate ducts attach to the louver to reduce the mixing or short cycling of intake and exhaust air. The EEI-430 incorporates a drainable head and drainable jambs with low profile exhaust blades on the top and 30° non-drainable intake blades on the bottom.

Pottorff launches NEW Acoustic Miami-Dade louver, the EAJ-1235-MD

Pottorff is pleased to announce the launch of it's EAJ-1235-MD. This Miami-Dade approved louver is 12" deep and features a 35 degree insulated J-Blade. This model is also Florida Building Code approved and is AMCA certified for Water Penetration, Air Performance and Sound. It's also AMCA listed for Impact Resistance.

Free Area Velocity: 924 fpm (4.70 m/s)
Air Volume Delivered: 4528 cfm (2.14 m3/s)
Pressure Loss: 0.08 in. wg. (20 Pa)

Pottorff Launches Redesign of the EXD-437 with Improved Performance

Our 4” combination louver, the EXD-437, now features new operable blades, stainless steel jamb seals and standard low leakage seals. It is also now AMCA Certified for Water Penetration and Air Performance.

Pottorff launches NEW Combination Blade, Miami-Dade louver, the EXA-645-MD

Our new 6" deep 37.5 - 45 degree louver features a combination airfoil blade. It's a Miami-Dade certified, Florida Building Code approved and AMCA certified for Water Penetration and Air Peformance. It's also AMCA listed for Impact Resistance.

Pottorff's 2017 Representative Luncheon Meeting in Las Vegas a Success

We invited our representatives to meet and talk with us over lunch about their issues and concerns. They also viewed new product displays, new pricing software demonstrations, a 2016 Year in Review and what was in store for 2017. We were also very excited to be able to award our representatives for reaching their goals and helping us to reach ours. It was a fun and productive afternoon for our reps and for our associates.

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FSD-150 Series Rated at 4000 FPM and 350 degree F

Pottorff is pleased to offer the FSD-150 Series steel airfoil combination fire and smoke
 dampers now for installation in systems designed for the extreme airflow of 4000 FPM and the blistering temperature of 350 degree F.

FSD-151 1-1/2 HR UL Class 1 Combination Fire/Smoke Damper
FSD-152 1-1/2 HR UL Class 2 Combination Fire/Smoke Damper
FSD-351 3 HR UL Class 1 Combination Fire/Smoke Damper
FSD-352 3 HR UL Class 2 Combination Fire/Smoke Damper

Pottorff Products featured in ASHRAE Journal AHR Expo Edition

Our UL rated Fire, Smoke and Combination FIre/Smoke dampers were specified for the World Trade Center complex in New York City. This project had stringent product performance requirements and our products met and exceeded them.

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