Crystal Introduces Sound Reduction Acoustic Casement Window

-Series AC85 Window Provides Solution for High Noise Locations-

QUEENS, NY, September 12, 2019 –National manufacturer Crystal Window & Door Systems, based in New York City, has added an outstanding sound reduction window– the AC85 Acoustic Casement Window– to its ever-growing product line.  The Crystal AC85Acoustic Casement Window delivers superior sound attenuation and is increasingly popular in buildings situated near airports, rail lines, highways, heavy-traffic city streets, or other demanding high-noise locations.

The aluminum frame Crystal AC85 Acoustic Window is available in either the combined in-swing/out-swing casement or fixed window styles.  The heavy-duty aluminum 7-⅞” depth thermally-broken master frame window features a dual-sash configuration (the interior sash opening in and the exterior sash opening out) capable of delivering impressive acoustical sound reduction ratings of STC 57 and OITC 46


STC (Sound Transmission Class) and OITC (Outdoor-Indoor Transmission Class) are standardized measures of the window’s ability to reduce sounds transmitted through it when closed and locked.  The STC rating number roughly reflects the decibel reduction in noise that a partition can provide.  OITC is a similar but much newer and less established sound reduction evaluation scale which covers different frequency ranges from STC ratings.

A higher STC value means greater sound reduction or blocking ability.  Since the STC is logarithmic, even a small increase in STC value means a significant increase in noise reduction.  Typical STC ratings for a basic single-pane window are about 27 and for a double-glazed window, 26-37.  An 8” cinder block wall with insulation and drywall have been STC rated at 54.  The Crystal AC85 Acoustic Casement Window comes in with an even higher STC 57 rating.

The Crystal AC85 Acoustic Casement Window dual sashes each have a 1-¼” glazing pocket which accepts double or triple pane insulated glass units.  With appropriate glass, Low-E coatings, and argon filling options, notable U-values of 0.28 are achieved.

Multipoint sash locks actuated by a sleek, modern design brushed chrome finish handle assure a tight and secure closed seal.  Sash opening limit devices and screens are available.  A variety of standard and custom color durable finishes for the window are available in either the standard AAMA 2604 or the optional AAMA 2605powder coat environmentally sustainable paint finishes.

To facilitate installations, an assortment of Crystal’s accessories such as mullions, receptors, and subsill systems are available.  The AC85 master frame can also be mated with factory-installed PTAC louvers, perfect for multi-family housing, hotel, or other new construction or renovation projects.