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Radon Design Blog

Guides on radon-control design for multifamily, HUD, school, and commercial construction, keyed to the ANSI/AARST standards reviewers check for.

• Published July 28, 2026

  Radon Mitigation Design for New Schools

  How to design a radon mitigation system for a new school to ANSI/AARST CC-1000-2018: which standard applies and how footprint drives system count.

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• Published July 24, 2026

  Radon Control System Design for Commercial Buildings

  A commercial radon control system design is a stamped plan that keeps soil gas out of a new building, fixing sub-slab layout, barrier, and vent stack.

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• Published July 21, 2026

  Radon Vent Stack Sizing for Multifamily Buildings

  How radon vent stack sizing works for multifamily buildings: the 2-inch, 3-inch, and 4-inch airflow bands, and what pressure field extension decides.

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• Published July 17, 2026

  Passive vs. Active Radon Control in New Construction

  Passive radon control vents soil gas on stack effect; active adds a fan. New construction starts passive, converting only if a test exceeds the limit.

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• Published July 14, 2026

  What Is Included in a Radon Mitigation Design Package for Large Buildings

  A large-building radon mitigation design package includes collection layout drawings, barrier and sealing specifications, vent routing, and fan provisions.

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• Published July 10, 2026

  Radon System Design for New Apartment Buildings

  How to design a radon system for a new apartment building to ANSI/AARST CC-1000-2018: package scope, passive vs. active control, and vent routing.

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• Published July 7, 2026

  SGM-MFLB-2023 Radon Mitigation in Existing Large Buildings

  ANSI/AARST SGM-MFLB-2023 is the standard for mitigating radon in existing multifamily, school, and commercial buildings, and what a design must contain.

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• Published July 3, 2026

  HUD Radon Requirements for Multifamily Housing

  HUD-financed multifamily housing addresses radon two ways: ANSI/AARST testing at a 4.0 pCi/L action level, and CC-1000-2018 design for new construction.

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• Published June 30, 2026

  ANSI/AARST CC-1000 Radon Design Requirements for New Construction

  ANSI/AARST CC-1000-2018 sets radon design requirements for new multifamily, school, and commercial construction: gas barrier and sub-slab collection.

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• Published June 29, 2026

  Radon Mitigation Design for Multifamily Buildings

  How to design a radon mitigation system for a multifamily building to ANSI/AARST CC-1000-2018: package scope, passive vs. active, and HUD requirements.

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