air ventilation




Stale and stinky:  If you are lacking fresh air but aeration is not an option, it could be due to a bathroom with no window, a kitchen with a tiny window, the cellar or a small bedroom with windows opening to a high traffic area.  Conference and meeting rooms are also not always properly aerated.  Sometimes even building structure characteristics make additional aeration necessary.

Or perhaps you don’t want to part with expensive heated air?

Stands to reason – you put yourself at risk by dispensing with additional aeration.  Cigarette smoke or noxious fumes from paint and cleaning products put your health at risk.  It becomes very serious when condensation from the kitchen, bath or cellar collects to form mould that puts your health as well as the building structure at risk. 

Clearly, this is not good.
Our ventilation technology allows people and homes to breathe easy.  Regulated ventilation saves energy and provides fresh air – for a better quality of life.

Reduce moisture

Prevent moulding

Save energy

Fresh air all the times


Ventilation for Homes

Up to 90% of the heat is returned!

Ideally, new homes will be built to minimize leakage to control energy loss, improve comfort, and minimize the transport of moisture and pollutants through the building shell. These homes should then also have mechanical ventilation to remove pollutants generated in the home and provide outdoor air in a controlled manner.


Whether a mechanical ventilation system makes sense in your existing homes depends on the house, your existing heating, ventilation, and air-conditioning (HVAC) system, and the changes you have planned.

Most time of our live we spend in closed rooms. Usually with modern, heat insulated windows that do not let almost any fresh air in from outside. With every breath of air we take we are consuming oxygen and releasing condensation, additionally carbon dioxide and nitrogen oxide burden the room air through paint and care products.

To avoid that our air is not kept away with the increasing humidity and that harmful mildew does not grow on the walls, regular room ventilation is of utmost importance. The mildew attacks the building substances over the years and then our health when we breathe it in. Those who believe that they can get rid of the old and sticky air in the room by opening the window really are just throwing their money out of it. It's a shame for the expensive heated air.
Water vapour and humidity settle themselves on cool surfaces as condensation or condensed water. The relative humidity in rooms should lie under 70%. This is good for our repertory passages and prevents the formation of mildew.

The humidity attracted mildew is more than a disfigurement: They endanger the building substances and your health.
Regular aeration protects health and the building substance. This especially needs to be kept in mind for insulated houses with well-insulated windows and doors. But: Expensive heating energy is lost when windows are open. The solution: Marley Fresh-Air Ventilator with Heat Exchanger for innovative aeration. Exhausted air heats incoming fresh air.


You need to ventilate your home because you and your family generate moisture when you cook, shower, do laundry, and even when you breathe. More than 99% of the water used to water plants eventually enters the air. If you use an unventilated natural gas, propane, or kerosene space heater, all the products of combustion, including water vapor, are exhausted directly into your living space. This water vapor can add up to 5 to 15 gallons of water per day to the air inside your home. If your clothes dryer is not vented to the outside, or if the outdoor vent is closed off or clogged, all that moisture will enter your living space. Just by breathing and perspiring, a typical family adds about 3 gallons of water per day to their indoor air.

Home insulation installation and Benefits of EWI Systems