Why are outside air solutions important to IAQ?

Outside Air Solutions (OAS)

reFresh Filtered Supply Fans & TD In-Line Fan Series

Outside Air Solutions improve indoor air quality (IAQ) by exchanging stale, polluted indoor air for fresh outdoor air. S&P USA offers the industry’s widest selection of Outside Air Solutions to help create healthy indoor environments and meet ventilation codes.

View our product features below, and contact us to learn more about OAS products for your application and requirements.

Product Features

Let Fresh Air In

reFresh Filtered Supply Fans provide easy code compliance, easy maintenance, and fresh air for your home. With optional MERV 8 or MERV 13 filters, you do not have to worry about bringing pollen, dust, and other allergens into your home through your supply fan.

Find Your reFresh Model

Find the right reFresh model for your application today! Options include corded or hardwired, with or without our Envirosense ES24V controller, and two sizes to fit your needs and budget.

In-line Mixed Flow Duct Fans

TD-MIXVENT Series

Specially designed to maximize the airflow performance with minimal noise levels in a small, compact housing.

The ultimate solution for small to medium sized ventilation installations which require a high airflow to pressure ratio and occupy minimum space (e.g., false ceiling voids, cabinets and many other limited space environments).

TD-SILENT

(Designed for Rigid Duct Applications)

Extremely quiet, low profile fans manufactured in tough reinforced plastic material.

Sound waves are directed through the perforated inner skin and absorbed by a layer of sound-absorbent insulation.

These fans are fitted with rubber gaskets on the inlet and outlet to facilitate installation, absorb vibrations, and provide a virtually air-tight seal.

March 17, 2026