Broan Model QTRE080 Ultra Silent Bath Fan.  Same as NuTone QTRN080 but with different grille design.

Energy Efficient solutions in traditional designs. A bath fan needn't call attention to itself, especially when you don't want it to overpower the design of your bath or powder room. More important, it shouldn't call attention to itself on your electric bill. So we developed the QTRE line for energy efficiency in the high-traffic bathroom, and for those who seek a fan with a more traditional design. It simply does its job quietly, in every sense of the word.

Includes hanger bar system for fast and flexible installations for all types of construction. Fits in 2" X 8" ceiling construction. 

CFM - 80 CFM
Sones - 0.8 
Duct Size - 4" 
Grille Dimensions - 13" X 14"
Housing Dimension: 10-1/2" x 11-3/8" x 7-5/8"
Amp Draw - .4 Amps
Energy Star Qualified - yes
UL Listed - yes - Listed for use over bathtubs and showers when connected to a GFCI protected branch circuit.
Warranty: 3 Years

FEATURES

BLOWER:
. Plug-in, permanently lubricated motor - engineered for continuous operation
. Dynamically balanced centrifugal blower wheel for quiet, efficient performance
. Low RPM for quiet operation
. Resilient anti-vibration motor mounts

HOUSING:
. Rugged, 26 gauge, galvanized steel construction
. Polymeric, 4" round duct connector with tapered sleeve and no metallic clatter
. 7-5/8" height allows for 2" x 8" (nominal) joist installations
. Sturdy, easy, four-point mounting directly to joist
. Includes unique spacer (patent pending) for mounting to engineered "I" joists
. Includes hanger bars to position housing anywhere between 16" to 24"-on-center joists 
. Two sets of mounting holes for hanger bars allow flush installation with bottom or top of drywall

GRILLE:
. Polymeric construction
. Innovative design - the result of extensive research with designers
and consumers