Here you will find tips on residential ventilation and ventilation systems such as self-ventilating, mechanical exhaust air and mechanical from and supply air systems.

Housing Ventilation - Ventilation Tips

Housing Ventilation - Ventilation Tips


Good indoor ventilation requires good residential ventilation. A poorly functioning residential ventilation can mean increased energy costs for the homeowner. If the house ventilation does not work, the house can cause moisture damage, increased incidence of mites and higher radon levels. The ventilation in the houses is used to replace contaminated and pampered indoor air against cleaner outdoor air. Many of the pollutants we get through cooking, laundry and smoking. In many houses, condensation on windows is a problem. The condensation may be a sign that the ventilation in the house is bad.

Some quick controls you can start with

- Can the warm air from the radiators swivel past the window sill and heat the window, or is the gap between the window sill and the wall too small? ? There should be a hole in the windowsill that directs the warm air from the radiators to the window.

- Are curtains too close to the window? The curtain can prevent the warm air from reaching the window.

- How long does it take before the shower on the bathroom mirror is gone after a shower or bath? If the home ventilation is sufficient, it should be gone after about 20 minutes. Much condensation may be a sign that the ventilation system needs to be reviewed and perhaps improved.

Start with simple steps

If the house is a mechanical ventilation system, it is important to regularly clean and change the channels, but there is no requirement today on this. The reason is that good residential ventilation is in the homeowner's own interest and therefore does not need to be regulated. The oldest, but still the most common system for venting houses is the self-venting.

For ventilation ventilation, there are three different types of ventilation systems:

- Ventilation Ventilation

- Mechanical Ventilation Ventilation
- Mechanical
Self-vent ventilation

Residential ventilation with self-venting means that the warm indoor air (exhaust air) rises upwards, often in separate exhaust air ducts or via the chimney vent channels. The air that passes through the ducts must be replaced with fresh fresh air (supply air) from the outside. It often enters through leaks, weather windows or special valves. A self-pulling system is highly dependent on weather. In windy weather, you get a great deal of air change, but on warmer weather and windstorms, ventilation can almost completely stop. This makes it often difficult to influence the self-venting, especially if the supply air enters the house only through imperfections.

Studies show that the self-venting system is the type of residential ventilation system that is loaded with the most faults of the different types of ventilation. There are some steps you can take to improve self-ventilation:

- Seal windows and doors

- Install supply air valves. There are thermostatically controlled self-regulating fresh air valves that adjust air supply to outside temperature.

- Determining structural defects, such as poor insulation of windbreakers.

If you have residential ventilation with the principle of self-sufficiency, be careful about the additional insulation of the windbreaker as the chimney becomes colder when switching to mountain heat , district heating or waterborne electric heating. The wind space is affected by the chimney becoming colder, which causes the hot air that "rises" through the windbreaker to accelerate more quickly to the wind and give rise to moisture and mold problems.

It is therefore important to ensure that the air and exhaust ventilation works properly before adding the windshield. It can be difficult to get the self-vent ventilation to work unsatisfactory all year long. Wind turbine problems can be remedied by improved residential ventilation so that the warm humid air is vented through your chimney before it reaches the windshield.

Mechanical exhaust air system

Many houses built after the 1960s have residential ventilation with so-called mechanical exhaust air system. The indoor air (exhaust air) is then sucked out by means of a fan through channels from the kitchen, bathroom, toilet and laundry room. Supply air comes in the same way as in a self-propelled system - through apertures, valves or openings. In house with exhaust air system, you have a better opportunity to control the ventilation and control the airflow.

To get a good residential ventilation on mechanical exhaust systems, the house must be fairly tight. If you experience a problem with the ventilation or that it is not working properly, you can do the same as for self-ventilating.

- Adjust the airflow in the system

- Install heat pump to utilize the heat in the extract air to heat the hot water or radiator system.

Mechanical from and supply air system
In houses where residential ventilation with mechanical and supply air systems is supplied to the supply air (outdoor air) with the aid of fans. An advantage of this system is that you can pre-treat the air that is taken into the house. The supply air can be filtered, heated and possibly cooled. Since mechanical from and supply air systems are technically complicated, it requires regular supervision and cleaning of the ducts, ducts, filter changes and adjustment. If this ventilation system does not work, it usually takes the help of a specialist.


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