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Image:

Visual inspection shows a considerable amount of dust has accumulated on this bathroom exhaust fan motor and fan blades

Visual inspection shows a considerable amount of dust has accumulated on this bathroom exhaust fan motor and fan blades
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Wind-Damage Reduction as a Function of Retrofit Level

Wind-Damage Reduction as a Function of Retrofit Level
CAD File:

Window head at window frame wall

Preview Image
Window head at window frame wall
CAD File:

Window head at wood frame wall

Preview Image
Window head at wood frame wall
CAD File:

Window sill at wood frame wall

Preview Image
Window sill at wood frame wall
CAD File:

Window sill at wood frame wall

Preview Image
Window sill at wood frame wall
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With the nailed block method, wood blocks are attached to the sill plate and the cripple wall plywood is attached to the block to provide shear strength for correctly bracing a cripple wall in a seismic retrofit

With the nailed block method, wood blocks are attached to the sill plate and the cripple wall plywood is attached to the block to provide shear strength for correctly bracing a cripple wall in a seismic retrofit
Case Study:

WPPI GreenMax-Chambers Residence: Near Zero Energy Monitoring Summary

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Wrong - A typical vented crawlspace in North Carolina exhibits water leakage, poor drainage, and a low-quality vapor retarder that does not cover all of the ground surface and is not sealed to the walls.

Wrong - A typical vented crawlspace in North Carolina exhibits water leakage, poor drainage, and a low-quality vapor retarder that does not cover all of the ground surface and is not sealed to the walls.
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Wrong - Condensing furnace intake and exhaust are too close together.

Wrong - Condensing furnace intake and exhaust are too close together.
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Wrong - The furnace intake and exhaust are too close to each other and are missing rodent screening.

Wrong - The furnace intake and exhaust are too close to each other and are missing rodent screening.
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Wrong - The furnace intake and exhaust are too close to each other and should be facing different directions.

Wrong - The furnace intake and exhaust are too close to each other and should be facing different directions.
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Wrong – Airborne embers can float into holes in damaged vent screens and ignite flammable items in the house or accumulated debris in the vent.

Wrong – Airborne embers can float into holes in damaged vent screens and ignite flammable items in the house or accumulated debris in the vent.
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Wrong – An open and/or sloped soffit can trap heat and burning embers as a wildfire approaches, increasing the risk of ignition of the structure.

Wrong – An open and/or sloped soffit can trap heat and burning embers as a wildfire approaches, increasing the risk of ignition of the structure.