Rectangular and Square units

Cedar Rectangular unit shown.

Units available in Cedar, Pine, Redwood, Cypress, and cellular PVC.

Standard sizes:

  • 12 x 16
  • 15 x 18
  • 15 x 24
  • 16 x 16
  • 16 x 20
  • 18 x 18
  • 18 x 24
  • 23 x 22
  • 23 x 30
  • 24 x 24
  • 24 x 36
  • 36 x 48


Custom and special sizes available as required.

Customs and specials require email or fax drawings and approval process.

Octagon units

Typical Cedar octagon unit.

 We produce all shapes in Pine, Cedar, Redwood, Cypress, or cellular PVC.

Unit dimensions are figured from outside of casing (brick mold or flat style) to outside of casing.

Standard units - 18", 24", 30", 32" , 34".

Other sizes available made to order, fax or email drawings and customer approval required prior to fabrication.

Round units

Round units are available in Pine, Cedar, Cypress, Redwood and Cellular PVC.

Size is measured from any one point on circle at exterior of casing to same opposite point.

Size is NOT box size-  Box size is smaller than casing size.

Some units with round casing will have square or octagon box,  true round units more expensive.

Call with questions -  1- 866- 534 -5769

Standard Round units:

  • 18"
  • 24"
  • 30"
  • 32"
  • 36"

Special and custom sizes available,  approval by email or fax required on all special sizes before order accepted.

Gable or A vents

Gable or A vents -  too many size options to list them all.

Sketch is shown, but units are available in Pine, Cedar, Cypress, Redwood, and cellular PVC.

Unit size is determined by roof slope and base length-  see sketch.

Buyer must specify:

  1.  roof slope
  2. base length
  3. species of wood

 prior to price or purchase.

We have many old stock pine large units available for as little ast $10 each plus shipping, call or email for details.

Keyblock units

Keyblock and Plantation units also available.


Treated foundation vents

Foundation vents available in pressure treated yellow pine and other species on request.

These are NOT operable, they are fixed style vents.

Ideal for:

  • porches
  • raised foundations
  • other areas where want true ventilation or deep shadow line vent details.
  • can be provided with galvanized hardware cloth to prevent rodent or bird entrance.

Contact us for details and quotes. 

Cellular PVC units

Looking for low maintenance but still want the wood appearance?

Try cellular PVC vents.

Units are made from PVC "lumber" and are very similar in appearance to wood units.

Never paint white units again, or paint custom colors with proper paint.

Cellular units are priced very competitive with Cedar and Redwood units.

All styles and details available in wood can be produced in PVC.

custom and special

Thanks to one of our suppliers for this photo of many custom and special units available.

We do not manufacture all units we sell.

Some are made by other vendors to our specifications or your custom requirements when our shop is busy or your time or detail requirements cannot be met in our plant;

Several facilities can be accessed in various parts of the country to reduce shipping costs on large orders.


photos and other information on this site are property of SWPLLC and may not be copied in any way without permission.

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