Sub-slab depressurization radon reduction method and apparatus

Details Sub-slab depressurization radon reduction method and apparatus Sub-slab depressurization radon reduction method and apparatus

1990-10-24

1992-04-07

Joyce, Harold

Ventilation

Having outlet airway

With air pump

521695, 454345, 454909, F24F 1100

Patent

active

051017121

ABSTRACT:
A sub-slab depressurization (SSD) radon reduction system uses an existing sub-slab refrigerant line chase as a vent pipe for suction of soil gas from a centrally located sub-slab suction point. A suction pit is excavated proximate the penetration of the slab by the chase, preferably by drilling and removing soil through the chase. The open ends of the chase are sealed with segmented end caps having two tubular sections, one for sealing around the refrigerant lines and the other for connecting externally to a soil gas evacuating air pump and internally to system monitoring instrumentation. A condensate dump assembly is located at the chase exit port.

REFERENCES:
patent: 4858521 (1989-08-01), Heh
patent: 4957394 (1990-09-01), Jarnagin et al.
patent: 4988237 (1991-01-01), Crawstaw
Michael Lafavore, Radon: the Invisible Threat, 1987, pp. 134-191.
Application of Radon Reduction Methods, EPA/625/S-88/024, U.S. Environmental Protection Agency, Aug. 1988.
Randon Reduction Methods: A Homeowner's Guide, OPA-86-005, U.S. Environmental Protection Agency, Aug. 1986, pp. 16, 18 and 20.
Radon-Resistant Residential New Construction, EPA/600/8-88/087, U.S. Environmental Protection Agency, Jul. 1988, pp. 29-51.
Radon Reduction Techniques in Schools: Interim Technical Guidance, EPA 520/1-89-020, U.S. Environmental Protection Agency, Oct. 1989, pp. 15-21.
Radon Reduction in New Construction: An Interim Guide, OPA-82-009, U.S. Environmental Protection Agency, Aug. 1987.

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