Gable VentsThe vent that started it all!

Turbine installation

Vari-Pitch Adjustable Vents

Lomanco makes it fit - whatever the pitch.

Years ago, with the ingenious invention of the adjustable gable louver, Lomanco was born.

All Lomanco Vari-Pitch Adjustable Louvers are constructed entirely of heavy gauge aluminum. Units are completely assembled, ready to install.

To determine the size needed, just measure down along the roofline from the peak of the roof to the frame. The appropriate size louver will adjust to the opening in seconds, and can be installed securely in minutes.

Lomanco® 900 Series

The Lomanco® Series 900 Adjustable Louversfit roof pitches of 2-1/2/12 to 9/12. The ingenious design actually forces the louver blades to pivot, changing angle as the unit is adjusted. This permits maximum air flow capacity while assuring optimum protection from the weather.

Lomanco® A-Series

The Lomanco® A-Series Vari-Pitch Adjustable Louversare available in high pitch and low pitch designs. They also feature all-aluminum construction and are completely assembled and ready to install.

Lomanco® 300 Series

Lomanco® Twin Section Stationary Louverscan be used in matched pairs for roof peak installation, or one by one for sheds, kneewalls and similar structures. The rugged, all-aluminum sections are joined securely with quick and easy slip joint center fasteners. Lomanco's extra-wide mounting flange permits easy installation.

Rectangular Vents

Lomanco® 100,150 and 200 Series

These heavy gauge, all-aluminum gable vents are tightly constructed with machine tab folds, and feature wide mounting flanges for easy installation. Weather and pest protection is assured.

  • Features
  • Instructions
  • 900, A Series
  • 300 Series
  • 100, 150, 200 Series

Lomanco® Triangular Line Gable vents

  • A-Series is adjustable for steeper pitches.
  • A-Series all-aluminum vari-pitch louver adjustable from 6/12 to 12/12 roof pitches.
  • A Series and 900 Series have a unique blade design that provides maximum weather protection.
  • 900 Series all-aluminum, vari-pitch louver. Adjustable from 2-1/2 12 to 9/12 roof pitches.
  • 300 Series all-aluminum, twin section stationary louver. Two-piece complete louver with easy slip joint connectors.
  • Applicable in sheds, knee walls, etc.
  • 300 Series embossed painted finish for added strength, extended paint life, durability, and blending appearance.
  • 8x8 perma-coated screen provided.
  • Wide mounting flange.
  • Note: A Series and 900 Series Chart available for specifications at each pitch adjustment.

Lomanco® Square Line Gable vents

  • All-aluminum construction.
  • 100 Series used for flush mounting.
  • 200 Series used for recessed mounting. Ideal for homes with siding or brick.
  • 150 Series can be mounted flush or recessed.
  • 100 and 200 offer wide mounting flange.

Lomanco® Gable Vent Instructions

Model Name Description Link
900 Gable Vent Vari-Pitch Chart “DL”
900 Gable Vent 900 Series Installation “DL”
300 Series Gable Vent A Style
Note: A Series and 900 Series Chart available for specifications at each pitch adjustment.
*Recommended stock sizes. Available colors: Mill Finish, White, Brown
Model Frame LTH. (in.) Adjustable Base LTH. (in.) NFA (in.2) QTY. CTN. WTN. CTN. (lbs.)
904 21.25 41.625 - 34 34 to 69 1 2.5
*905 26.25 51.375 - 42 57 to 117 1 3.5
906 31.25 61.125 - 50 86 to 181 1 4.75
*907 36.25 71 - 58 122 to 255 1 6
908 41.25 80.75- 66 163 to 341 1 8
*909 46.25 90.5- 74 211 to 439 1 8.75
910 51.25 100.375- 82 263 to 548 1 11
911 56.25 110.125- 90 320 to 668 1 13.5
A50B 20.375 36.375- 28.875 46 to 60 1 2.5
A56B 23.875 42.875- 33.75 71 to 100 1 3.25
A88B 27.56 49.375- 39 81 to 142 1 4
*Recommended stock sizes. Available colors: Mill Finish, White, Brown
Model Base LTH. (ft.) Roof Pitch Center HT. (in.) NFA (in.2) QT. CTN. WT. CTN. (lbs.)
306-3 6 3/12 9 80 1 4
306-4 6 4/12 12 121 1 3.75
306-5 6 5/12 15 162 1 4.5
308-3 8 3/12 12 166 1 5
*308-4 8 4/12 16 242 1 6.5
*308-5 8 5/12 20 322 1 7
*308-6 8 6/12 24 408 1 8
310-3 10 3/12 15 273 1 7.25
*310-4 10 4/12 20 398 1 8.5
*310-5 10 5/12 25 523 1 10
310-6 10 6/12 30 605 1 11.5
312-3 12 3/12 18 416 1 12
312-4 12 4/12 24 609 1 11.5
312-5 12 5/12 30 805 1 14.25
*Recommended stock sizes. Available colors: Mill Finish, White, Brown
Model Hole Size Overall Size (in.) NFA (in.2) CTN QTY WT. CTN. (lbs)
100 8x8 11 x 11 22 6 3.25
100 8x12 11 x 15 36 6 4
100 8x16 11 x 19 51 6 5
100 *12x12 15 x 15 56 6 5.5
100 12x16 15 x 19 79 6 6.25
100 *12x18 15 x 21 90 6 7.5
100 12x24 15 x 27 124 6 9.25
100 14x18 17 x 21 106 6 8.25
100 *14x24 17 x 27 146 6 10.5
100 *18x24 21 x 27 190 6 12.5
100 24x14 27 x 17 140 6 9.25
100 24x24 27 x 27 256 6 14.5
100 *24x30 27 x 33 325 6 19.25
100 30x12 33 x 15 146 6 10.5
100 30x18 33 x 21 234 6 13.75
100 30x24 33 x 27 332 6 18.75
150 8 x 8 10 x 10 19 12 4.5
150 12 x 12 14 x 14 49 12 8.5
150 12 x 18 14 x 20 79 12 11.5
150 14 x 24 16 x 26 128 12 16.25
150 18 x 24 20 x 26 147 12 20.25
150 24 x 30 26 x 32 285 6 15.25
200 8x8 11 x 11 22 6 3.75
200 8x12 11 x 15 36 6 4.5
200 8x16 11 x 19 51 6 5.5
200 *12x12 15 x 15 56 6 6.25
200 12x16 15 x 19 79 6 7.5
200 *12x18 15 x 21 90 6 8.25
200 12x24 15 x 27 124 6 9.75
200 14x18 17 x 21 106 6 8.75
200 *14x24 17 x 27 146 6 11.75
200 *18x24 21 x 27 190 6 13.75
200 24x14 27 x 17 140 6 10.5
200 24x24 27 x 27 256 6 16.75
200 *24x30 27 x 33 325 6 20.5
200 30x12 33 x 15 146 6 12
200 30x18 33 x 21 234 6 16.5
200 30x24 33 x 27 332 6 20

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