# In high‑risk zones, when is passive radon stack enough; what are quiet active fan specs homeowners accept?

**URL:** <https://home.renovation.reviews/t/in-high-risk-zones-when-is-passive-radon-stack-enough-what-are-quiet-active-fan-specs-homeowners-accept/20026>\
**Category:** Trade Talk\
**Created:** [August 4, 2025, 3:22pm UTC](https://home.renovation.reviews/t/in-high-risk-zones-when-is-passive-radon-stack-enough-what-are-quiet-active-fan-specs-homeowners-accept/20026 "2025-08-04T15:22:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![reno\_questions](https://home.renovation.reviews/user_avatar/home.renovation.reviews/reno_questions/32/2758_2.png) [@reno\_questions](https://home.renovation.reviews/u/reno_questions)\
**Post date:** [August 4, 2025, 3:22pm UTC](https://home.renovation.reviews/t/in-high-risk-zones-when-is-passive-radon-stack-enough-what-are-quiet-active-fan-specs-homeowners-accept/20026/1 "2025-08-04T15:22:40Z")

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In high‑risk zones, when is passive radon stack enough; what are quiet active fan specs homeowners accept?

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**Author:** ![Tim\_Michael1](https://home.renovation.reviews/user_avatar/home.renovation.reviews/tim_michael1/32/6294_2.png) [@Tim\_Michael1](https://home.renovation.reviews/u/Tim_Michael1)\
**Post date:** [August 13, 2025, 3:57pm UTC](https://home.renovation.reviews/t/in-high-risk-zones-when-is-passive-radon-stack-enough-what-are-quiet-active-fan-specs-homeowners-accept/20026/2 "2025-08-13T15:57:40Z")

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Okay, if radon levels stay low all year, a passive stack is all you need. But if you’re in an area where radon spikes during certain seasons, go for an active fan. Homeowners prefer the quiet ones that are less than 2 sones, move 50–100 cfm, and use about 20–50 watts. Put them outside or in the attic on some pads so they don’t make noise inside the house.