Overview

Help Your Deck Dry Up To 8x Faster

An OASITek Underdeck System transforms the space beneath your deck into a dry, usable outdoor living area. However, creating a ceiling below the deck framing can reduce natural airflow within the cavity between the deck boards and the underdeck ceiling.

The OASITek Power Ventilation Fan is specifically designed to address this challenge.

Installed discreetly within the underdeck system, the fan continuously monitors humidity levels inside the enclosed deck cavity. When humidity rises above a predetermined level, the system automatically exhausts moisture-laden air from the space, helping the structural framing dry significantly faster after rain and humid weather conditions.

While homeowners will rarely notice the system operating, the deck structure above benefits substantially from improved drying conditions.

The result is a healthier deck structure, reduced moisture retention, and enhanced long-term protection of your investment.

How It Works

The OASITek Power Ventilation Fan is designed to operate automatically, requiring virtually no homeowner interaction.

The fan is mounted discreetly at one end of the deck cavity and vents through a small opening in the exterior deck band. A dehumidistat sensor is installed away from the fan—typically at the opposite end of the deck—to accurately monitor humidity levels throughout the entire cavity.

Whenever moisture levels within the deck cavity rise above the preset humidity level, the ventilation fan automatically activates and begins exhausting humid air from the enclosed space. As humidity returns to the desired range, the fan automatically shuts off.

This intelligent, humidity-controlled operation helps promote faster drying of structural framing while minimizing energy consumption and maintenance.

Why You'll Love It

Drying Times Up To 8x Faster

Independent testing and field observations have shown that increased airflow can dramatically accelerate drying times within enclosed deck cavities.

The OASITek Power Ventilation Fan can help structural framing dry up to eight times faster compared to similar enclosed spaces without active ventilation.

Faster Drying Means:

✔ Less time that framing members remain saturated

✔ Reduced moisture retention within structural lumber

✔ Lower risk of long-term wood deterioration

✔ Reduced potential for rot-related damage

✔ Improved long-term structural durability

✔ Better protection of the deck's structural integrity

Protecting Two Major Investments

Most homeowners view their deck and underdeck as separate projects. In reality, they are closely connected.

Your deck structure supports the entire system, while your underdeck ceiling enhances the usable space below. Protecting the structural framing above helps protect both investments simultaneously.

The OASITek Power Ventilation Fan serves as preventative protection by helping maintain a drier environment within the deck cavity year after year.

For a relatively small upfront investment, homeowners can help maximize the lifespan of:

• Deck joists
• Beams
• Rim joists
• Ledger boards
• Fasteners and connectors
• The overall deck structure
• The underdeck system installed beneath it

What's Included

Complete Ventilation Kit Includes:

✔ Power Vent Fan

✔ EDH-1 Humidistat

✔ Exterior Wall Vent

✔ 15" × 15" Flashing

✔ Installation Instructions

Helpful Notes

• The OASITek Power Ventilation Fan requires a 120V power source.

• Electrical wiring and power connections are not included.

• A 120V power cable must be run to the fan location.

• The dehumidistat must be wired to the fan in accordance with the manufacturer's installation instructions.

• Installation should comply with all applicable local electrical codes.

• The fan is designed to be installed within an OASITek Underdeck System and vent through the exterior deck band using the included wall vent and flashing.

• Professional installation is recommended for all electrical connections.