New Combination Fire Smoke Damper From Greenheck
Model FSD-331 from Greenheck is a three-hour rated combination fire smoke damper with Class I leakage. Featuring a high-strength airfoil-style blade, Model FSD-331 operates with velocity ratings up to 4000 fpm and a pressure rating up to 4 inches wg. This steel airfoil blade combined with Greenheck’s profile frame design results in the industry’s lowest pressure drop. Model FSD-331 is available in a vertical mount with a maximum size of 120 inches wide x 96 inches high.
PRICE—Your solution for noise control!
Everyone recognizes PRICE as air distribution specialists, but did you know that they are also your solution for noise control?
PRICE has just introduced it’s latest product to its already extensive line, Noise Control Products. With the completion of the PRICE Noise Control Sound Lab in 2007, PRICE dove head first into noise control.
Sound is a common part of everyday life, but when a sound is unwanted, it is considered noise. When noise in a room is at unacceptable levels, it can be an annoyance, distracting the occupants and in turn resulting in higher stress levels and decreased productivity. This is why noise control has become just as important to a good HVAC system design as air movement, temperature control and humidity management.
Price has a complete line of Rectangular, Elbow, Circular, Packless and Specialty silencers.
Rectangular silencers are the standard for silencing noise transmitted through ductwork. Their simple design and relative low cost make them the first choice for the highest sound attenuation and lowest pressure drop on the air distribution system. They are available with a number of options that allow them to be integrated into any HVAC system with ease. A wide range of designs with low to high pressure drop and a large selection of media options can be applied to systems typically ranging from 0-2500 FPM.
Elbow silencers have many of the same performance characteristics of rectangular silencers but are extremely versatile and an excellent choice for systems where straight lengths of ductwork are not available.
Elbow silencers perform at or above the levels of rectangular silencers with a small increase in pressure drop on the system, and can be configured to suit most duct sizes without the use of transitions.
Circular silencers are an excellent solution when round ductwork is utilized in the system. They eliminate the need for square to round transitions that cause undesirable pressure drops and system effects. Circular silencers are available in a wide range of sizes, which allow for varying ranges of attenuation and pressure drop.
Packless silencers, sometimes referred to as reactive silencers, contain no absorptive material and are constructed solely of solid and perforated sheet metal. Attenuation of sound levels is achieved using multiple chambers of varying design located behind a perforated metal liner. As sound passes through the silencer the acoustic energy is dissipated in a manner similar to the Helmholtz resonator concept, which results in decreased sound levels at the discharge of the silencer.
A standard silencer configuration can not always be adapted to work in every situation. in these cases it is necessary to develop a unique silencer that meets the requirements of the special application. Let us know about your special application needs and we will be glad to assist you.
Ask your Air-Side salesman to get you a PRICE Noise Control catalog today! They can also show you PRICE’s All-IN-One Silencer selection program and install it on your computer.