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Active Soil Depressurization –
ASD-HP Rough-In Box
· Designed to provide more than eight times the soil contact area of the “EPA style” rough-in approaches · Eliminates problems with improper installation of toilet flange or PVC “T” rough-ins, such as misalignment, concrete fouling, and soil impaction · Eliminates the loss of fan power caused by friction loss incurred in the dramatic turns of other sub-slab rough-in techniques · Removable lid allows for the soil/aggregate to be examined for fouling, and corrected if necessary · Easily integrates with common soil depressurization techniques by use of the knock-out tab on lid · Can be located in a designated chase for a future active soil depressurization system · Eliminates the need for traditional coring or drilling in finished areas where such drilling would be difficult, costly, or impossible · ASD-HP4 for 4” pipe and ASD-HP6 for 6” pipe
Active Soil Depressurization – Installation Instructions
ASD-HP4 Rough-In Box1. Locate and Center ASD-HP4 Rough-In Box as per drawings 2. Adjust grade as required to align top with top of slab elevation 3. Secure ASD-HP4 Rough-In Box to soil as necessary 4. Place 4” minimum # 57 stone around box and under entire floor slab 5. Install poly vapor barrier over stone, taping to ASD-HP4 Rough-In Box to prevent concrete intrusion 6. Place reinforcing steel and concrete per drawings and specifications
To be used in conjunction with Pressure Field Extension Mat and/or PFE Grade-Beam Mat when applicable AirQES™ ASD-HP Rough-In Box Information The ASD-HP Rough-In Box (Active Soil Depressurization-Head Pressure Rough-In Box) is designed to provide the optimum interface between the buildings foundation floor slab and a future soil depressurization or soil pressurization system; either active or passive.The typical “EPA” style new construction methods such as a 3- or 4-inch PVC ¼ bend fitting, “T” fitting, or toilet flange placed in the gravel bed prior to placing the concrete by the plumber or laborers have very high failure rate or poor performance. They provide a very minimal soil contact area; about 7 sq. in. for a flange or ¼ bend, to about 14 sq. in. for a tee. A tremendous amount of fan or venturei effect power is lost to the friction that occurs by forcing the soil air to make dramatic turns in order to be moved above slab level. The awkward shapes are difficult to accurately locate and anchor for the concrete placement and can easily become dislodged during the pour by the force of the concrete being placed, labor maneuvering around the stub-ups, or being accidentally bumped; resulting in the end of the pipe becoming fouled or plugged with concrete or soil. Since there is no way to determine this has happened, it may go un-noticed for years after the home is completed and not be discovered until after an active system is installed. The ASD-HP Rough-In Box provides the optimum features for future “head-pressure” development. It provides more than eight times the soil contact area of the “EPA” style approaches (more than 113 sq. in. for the ASD-HP4). It’s unique shape and dimensions actually allow soil gases to slow down as they approach the pipe inlet, resulting in reduced friction loss and greater performance power delivered to the soil from the fan while at the same time making it easy to accurately locate and secure to soil. It’s large base and flush-with-slab top means it is less likely to be moved during the pour. Most importantly, the unique design with removable lid means that the soil/aggregate can easily be examined for fouling, and even corrected if necessary, before the piping system is installed. An additional benefit of the pre-installation of the ASD-HP Rough-In Box for a future suction point is that its location can be designed into floor plans in a designated chase for a future active soil depressurization system with an access panel provided to open the lid of the ASD-HP Rough-In Box to clean out as needed, drop the pipe, and seal the opening. To perform the traditional coring or drilling a suction point in a small finished chase without damage to the structure would be difficult, costly, or impossible.
Pressure Field Extension
PFE Grade-Beam Bridge Mat
· Provides air flow “bridges” under grade beams, eliminating pockets of unaddressed areas under the slab · Economical, easy to install alternative to other methods of connecting gravel beds with less chance of concrete fouling · Provides approximately 18 square inches of free air flow beneath the slab (compared to 12.5 square inches in 4” PVC pipe) with 1.5 square feet of soil contact area per lineal foot · Provided in pre-determined lengths capable of extending into the gravel beds on either sides of grade beams · Designed to enhance pressure field extension across large slabs by providing an under-slab “duct” for air to travel through with minimal friction loss or fouling · Longer sections can be used to create pressure fields under larger slabs, such as in commercial or multi-family applications · May be used in areas where clean, dimensioned stone is unavailable or as a cost-effective alternative to #57 stone
Pressure Field Extension Installation Instructions
PFE Grade-Beam Bridge MatPlace across grade-beam trench at 15’0” O.C. One per grade-beam minimum White Fabric side down Pin as necessary
1. Place PFE Grade-Beam Bridge Mat white fabric side down across and into the bottom of the grade-beam trench with ends tucked into gravel on either side of trench. Pin to the soil/gravel in trench if necessary. 2. Install poly vapor barrier over entire top of mat. 3. Place reinforcing steel as per structural drawings.
To be used in conjunction with an ASD-HP Rough-In Box AirQES™ Pressure Field Extension Mat Information The pressure field extension mat (PFE mat) has been specially designed to provide optimal, high air flow, low friction loss, large ground contact channels beneath the foundation floor slab that tremendously enhance the ability to extend fields (positive or negative) over larger areas. When properly installed, it provides approximately 18 sq. in. of free air flow space beneath the slab, and 1.5 sq. ft. per lineal foot of soil contact area. 4” perforated pipe on the other hand only provides about 12.5 sq. in. of free air flow area and soil contact area per lineal foot of pipe is extremely small.PFE mat may be used where clean, dimensioned stone is unavailable or in combination with stone under the floor slab to provide increased pressure field extension for large buildings; providing an under-slab “duct” capable of delivering higher pressure to locations far away from the ASD-HP Rough-In Box location. The PFE Grade-Beam Bridge Mat is used to provide air flow connections between pockets of clean, graded stone under the foundation floor slab that are created when grade-beams (thicken slab areas) are cast monolithically with the slab in order to provide load bearing capacity for walls built on top of the slab. They are provided in pre-determined lengths capable of extending from the gravel layers on each side of the grade-beam. Their low profile, high compressive strength, and flexibility allow them to simply be placed directly on the soil, fabric side down, directly under the poly vapor barrier prior to the placement of reinforcing steel; providing an economical, easy to install alternative to other methods of connecting the gravel beds such as fabricated U shapes of schedule 40 PVC pipe that must be placed in trenches beneath the soil and anchored to hold them in place during the placement of poly vapor barrier, reinforcing steel and concrete. For information contact AirQESTM, Air Quality Enhancement Systems, Inc. 770-455-8551 In no event shall AirQES™, Air Quality Enhancement Systems, Inc. be liable for consequential damages or damages of any kind exceeding the sale of any manufactured and distributed products found to have been defective. AirQES™, Air Quality Enhancement Systems, Inc. makes no warranties, express or implied by operation of law or otherwise, including but not limited to warranties of merchantability or fitness for any particular purposes or end use. Information contained herein regarding applications of manufactured or distributed products is of a general nature, and since conditions vary with each site, AirQES™, Air Quality Enhancement Systems, Inc. makes no guarantee of results or the sufficiency of the information contained herein for the use contemplated. U.S. patent pending. |
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