Mechanical ventilation heat recovery (MVHR) systems are designed to supply clean fresh filtered air and save the home owner money. Wholehouse mechanical ventilation systems are a perfect solution for modern well insulated and airtight houses and far outweigh the disadvantages of cheaper alternatives.
In a well built insulated building an automatic heat recovery ventilation system should be taken advantage of, taking this into consideration in good time will help to facilitate the planning and integration of the duct system. Early planning is best to help in the design of the ventilation ductwork in to make it unobtrusive and allow for the correct design airflow with the least amount of resistance.
The benefits of automatic ventilation.
There's multiple benefits of a well designed heat recovery ventilation system, the ventilation unit is constantly drawing fresh filtered air from the outside and circulating this air through the supply air valves, changing approximately 50% of the total air in the building each hour. Not having to have the doors and windows open has the benefits of the air supplying the property is drawn through the MVHR unit allowing the ingress of airborne contaminents to be captured within the ventilation units filters.
The supplied fresh air is constantly drawn through out the interior rooms via the extract valves and the air goes back through the ventilation unit to the outside of the building. Another main advantage of wholehouse ventilation system is as the air passes through the ventilation unit it passes through a heat exchanger and this captures energy in the form of heat and reintroduces it back into the new fresh filtered air entering the building.
This is especially effective in the winter months when the heating is on and the windows are closed and will help you save money, another big advantage at this time of year is the mechanical ventilation unit prevents the build up of condensation and help create the perfect environment.
In the summer months things are different in that the heating maybe not on as much and saving energy not so much of a priority. Well insulated buildings are designed to not lose energy and sometimes this leads to the building overheating, a mechanical ventilation system can help with this as the temperature rises the ventilation unit monitors this increase in temperature and switches over the automatic bypass valve and so removes all the air and just brings in the air from the outside and help keep the building to a reasonable temperature.
In the summer months the incoming warm air if it was not filtered can be particularly hazardous for allergy suffers such as repiratory issues and having the constantly filtered air is a big plus. Other health disadvantages of well insulated homes if a wholehouse ventilation system is not incorporated can be high levels of humidity and condensation, constant ventilation helps reduce this to help keep a healthy home.
The wholehouse heat recovery ventilation system can be further enhanced to provide even higher levels of filtration and the introduction of a different type of air exchange unit if your humidity levels are not within your preferred limits. Getting a balanced supply and extraction rate is very important, too high humidity and it can help spread bacteria and too low can cause discomfort.