The complete source for building, designing, and remodeling green homes

Building Science
Running Bath Fans to Control Humidity

To know whether bath fans will help or hinder, compare the indoor and outdoor dew points
Building Science
Venting Bathroom Exhaust Air

Never terminate bathroom exhaust ducts in an attic, where added humidity can lead to mold issues and expensive repairs
Product Guide
Multi-Speed Bath Fans for Whole-House Ventilation

An overview of products and functionalities
Building Science
Three Types of Ventilation: Pros and Cons

An overview of code-compliant ventilation systems and key considerations when choosing between them

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Running Bath Fans to Control Humidity