Product Brochure
31
• Positive open/close 
damper action
• Lintel for foundation block 
construction
• Lowers risk of frozen pipes 
• Helps prevent foundation 
decay
• Aluminum vanes; lintel 
not required
• For block, brick, or frame 
construction 
• Recommended for high-level 
ventilation
Grate Style
500
Block Style
BVSII
•  Designed for nailing to floor 
joists or as a foundation 
block replacement
Grill Style
LW1/LW1L
• Easy to mount over most 
 16" x 8"   foundation vents
Cover
FVC168
31
PRODUCT SPECIFICATIONS
Power
Model 
Number
Style Color Construction Description
N.F.V.A. 
(Sq. In.)
PFV1 Power Black
  High-Density 
Polyethylene
16" x 8" 
(1yr. ltd. warranty*)
57
Automatic
Model 
Number
Style Color Construction Description
N.F.V.A. 
(Sq. In.)
FVRABL Automatic Black
  High-Density 
Polyethylene
16" x 8"  57
Grate Style
Model 
Number
Style Color Construction Description
N.F.V.A. 
(Sq. In.)
500 Grate Mill
Die-Cast 
Aluminum
16" x 8" 
With Lintel & 
Slide Action 
28
Block Style
Model 
Number
Style Color Construction Description
N.F.V.A. 
(Sq. In.)
BVSII Block Mill
Galvanized 
Steel/
Aluminum
15 
3
/
8
" x 8" x 2 
3
/
4
" 
With Moveable 
Louvers
73
Plastic Slider
Model Number Style Color Construction Description
N.F.V.A. 
(Sq. In.)
PS168BL Slider Black Plastic 16" x 8" 40
Model Number Style Color Construction Description
N.F.V.A. 
(Sq. In.)
PNM168BL 
& 
PNM168BR
Replacement
Black/
Brown
ABS Plastic 
w/metal mesh
16" x 8" 
With 
Push/Pull 
Damper
57
Plastic Replacement
Grill Style
Model 
Number
Style Color Construction Description
N.F.V.A. 
(Sq. In.)
LW1 Grill Mill
Die-Cast 
Aluminum
16" x 8" 
With Damper
50
LW1L Grill Mill
Die-Cast 
Aluminum
16" x 8" 
With 1 
3
/
8
" 
Lintel & Damper
50
Cover
Model 
Number
Style Color Construction Description
N.F.V.A. 
(Sq. In.)
FVC168 Cover Mill Aluminum Fits Most Sizes  –
*See Master Flow
®
 Ventilation Products Ltd. Warranty for complete coverage and restrictions.
•  Plastic vent with slider 
and lintel
•  Manual open and close
•  For brick or block 
construction
•  Perfect for replacing old 
foundation vents
•  Simple to install with 
included screws 
•  No mortar required
•  Push/pull damper for easy 
open and close
Plastic Slider
PS168BL
Plastic Replacement
PNM168BL & PNM168BR










