Ventilation (Aprilaire Ventilation)

Living Room — AC Installation in St Louis, MO

Whole House Ventilation Solutions

Trade stale indoor air for fresh air all year round. Energy efficient windows and doors, thicker insulation and air tight vapor barriers have made homes more efficient, saving both energy and money. While this has made many homes more efficient, it has also made it nearly impossible for these homes to “breathe” and expel the stale polluted indoor air and exchange it for cleaner, fresher outdoor air.

“If too little outdoor air enters a home, pollutants can accumulate to levels that can pose health and comfort problems. Unless they are built with special mechanical means of ventilation, homes that are designed and constructed to minimize the amount of outdoor air that can ’leak’ into and out of the home may have higher pollutant levels than other homes. Some weather conditions can drastically reduce the amount of outdoor air that enters a home and pollutants can build up even in homes that are normally considered “leaky.”

What is It?

Ventilation is the exchange of indoor air for outdoor air. Two types of home ventilation methods include natural and mechanical ventilation. In natural ventilation, outside air enters the house through opened doors and windows. In mechanical ventilation, there are electronic devices such as fans that remove air from a single room, to whole-house systems that remove polluted indoor air and then distribute filtered and conditioned outdoor air throughout the house.

Why Do I Need Mechanical Ventilation?

According to the EPA, sources of indoor pollution that release gases or contaminants into the air are the primary cause of indoor air quality problems in homes. Not providing enough ventilation can aggravate and increase indoor pollutant levels by not bringing in enough fresh, outdoor air to dilute indoor source emissions and also by not carrying enough of potentially unhealthy indoor air pollutants out of the home.
Ventilating a home by opening doors and windows may not always be feasible due to security reasons, outdoor noise levels or weather conditions such as rain or snow. Mechanical ventilation allows a quiet, energy efficient way to exchange stale and sometimes toxic indoor air for fresh, outside air throughout your entire home. An Aprilaire Ventilation System allows you to ventilate your whole-home’s stale, polluted indoor air with fresh air in an energy-efficient way 365 days a year.

Your home needs ventilation—the exchange of indoor air with outdoor air—to reduce indoor pollutants, moisture, and odors. Contaminants such as formaldehyde, volatile organic compounds and radon can accumulate in poorly ventilated homes, causing health problems.

Get green with greater comfort from Aprilaire

Whether you’re updating your home to be more healthy, energy-efficient and sustainable or you’re building a new green-certified home, Aprilaire offers a complete line of innovative products designed to improve the quality of indoor air.

Our ventilation control systems help protect families by allowing tightly-built, energy-efficient homes to “breathe;” bringing in fresh, clean air while expelling harmful, polluted air. Ventilation systems help qualify your home for the Green-Built Certification Program of the National Association of Home Builders.
Core Benefits
Every Aprilaire product provides important key benefits for your family and home.

The American College of Allergists states that 50% of illnesses are caused or aggravated by poor Indoor Air Quality—illnesses such as colds and flu, allergies and asthma. Aprilaire Whole-House Ventilation puts dust, pollen, mold, bacteria and viruses, volatile organic compounds (VOCs) and other airborne pollutants where they belong—outside your home.


Excess indoor humidity has perhaps the most negative impact on your home’s comfort. Odors caused by pets, cooking and other everyday living activities also contribute to general discomfort. Aprilaire Whole-House Ventilation exchanges your home’s sticky, smelly air with fresh outdoor air.
Excess indoor humidity provides the perfect breeding ground for mold and mildew which destroy the surfaces on which they grow. Excess indoor humidity also causes condensation build-up on windows, destroying their finishes and structural integrity. Aprilaire Whole-House Ventilation, especially when combined with a dehumidifier, can be an effective means of minimizing damage caused by too much moisture in your home.

Energy Savings
Aprilaire Whole-House Ventilation provides you with real energy savings, allowing you to bring in the desired amount of fresh outdoor air into your home—exactly when you want it. Aprilaire Whole-House Ventilation also prevents air that is too hot or too cold from entering the home, keeping your heating and cooling system from operating unnecessarily.

8100 Whole-House Ventilator

Is the air your family breathes as fresh and healthy as it can be?

An Aprilaire Energy Recovery Ventilator (ERV) is among the most efficient means of exchanging the air inside your home with fresh outdoor air. In winter months, the exclusive EnergyMax® Transfer Core uses the heat of indoor air to warm the incoming cold fresh air, recovering approximately 77% of the energy.

How Does It Work?

In the summer, warm fresh air passes near outgoing conditioned air, cooling it down. At no time do the stale and fresh air streams mix, instead they pass each other separated by thin walls that allow only the air’s energy to transfer, cutting your heating and cooling bills. The heart of the ERV is the EnergyMax Transfer Core which uses enthalphic technology enabling the transfer of moisture as well as heat into and out of your home.

The Aprilaire Energy Recovery Ventilator (ERV) provides a comfortable, healthy, noise-free, and safe means of exchanging stale, polluted indoor air with fresh outdoor air in your entire home year round.


  • There are numerous benefits to installing an Aprilaire Energy Recovery Ventilator in your home:
  • Installs as part of any central heating and cooling system
  • Provides a constant, controlled supply of fresh air to your home year round
  • Reduces excess indoor humidity levels
  • Reduces unhealthy indoor air pollutants such as formaldehyde, volatile organic compounds (VOCs), radon, carbon dioxide, smoke, odors, dust, bacteria and viruses and more
  • Saves energy by effectively retaining and utilizing the energy value from your indoor air
  • Ventilates homes up to 3,600 sq. ft. in size

8126 Ventilation Control System

Get state-of-the-art control to keep your indoor air as fresh as possible.

Installed as part of your home’s heating and cooling system, the Aprilaire Ventilation Controller makes decisions regarding when—and how long—to ventilate. It does this through continuous monitoring of indoor relative humidity, outdoor temperature and user-friendly settings.


An Aprilaire Ventilation Control System allows you to manage the quality of your home’s air year-round, with little effort. An Aprilaire Ventilation Controller:

  • Will not ventilate if the outdoor temperature is above 100° F
  • Will not ventilate if the outdoor temperature is below 0° F
  • Only ventilates if a call for heat is received by your central heating system when the outdoor temperature is between 0° F and 20°
  • Will not ventilate if the outdoor air will raise indoor relative humidity above 55%
  • Has cycle times ranging from every one to four hours, with ventilation times lasting from zero to sixty minutes.
Service Area:
Affton, Arnold, Baden-Riverview, Ballwin, Bellefontaine Neighbors, Belleville, Berkeley, Breckenridge Hills, Brentwood, Bridgeton, Carondelet, Chesterfield, Clayton, Clifton Heights, Collinsville, Creve Coeur, Des Peres, Edwardsville, Ellisville, Eureka, Fairview Heights, Fenton, Ferguson, Florissant, Glen Carbon, Granite City, Hazelwood, High Ridge, Hillsboro, House Springs, Hyde Park, Imperial, Jefferson County, Jennings, Kirkwood, Lake St. Louis, Lemay, Manchester, Maplewood, Maryland Heights, Normandy, O'Fallon (MO), Oakville, Olivette, Richmond Heights, Sappington, Soulard, South Hampton, Spanish Lake, St. Ann, St. Charles, St. Charles County, St. Louis-Downtown, St. Louis Place, St. Peters, Swansea, Tower Grove, Town and Country, University City, Valley Park, Webster Groves, Wentzville, West County, West End, Wildwood