Benefits of heat recovery ventilation for residential buildings

Author: Vlad Caragea, EnergyPal-TimePal Romania and FMS

The latest studies show that we spend more than 80% of our time indoors – at home, at work, at school, etc. The quality of the air we breathe has an effect on our well-being and productivity. The World Health Organization has classified indoor air pollution as the 4th risk factor in lowering life expectancy. The main pollutants of indoor air are: radon, cigarette smoke, gases or particles from the combustion of fuels, chemicals and allergens.


 Ventilation system with heat and humidity recovery

An effective solution for improving indoor air quality is ventilation. The optimum solution is the use of a ventilation system with heat and humidity recovery. This system provides fresh, filtered air without heat loss in homes. The system allows simultaneous inlet and outlet of air without mixing the two streams.

An air / air heat exchanges is used to recover heat and humidity. The airflow that is discharged from the home gives up some of its heat to the fresh intake air flow. This heat exchange is done in the heat exchanges.

The vicious air from the bathrooms and the kitchen is exhausted through a pipe and fresh air is introduced into the rooms. The pipe through which the air is conveyed must be round in the case of residential buildings in order to reduce the operating noise.

The circulation of the two streams is represented here:

Benefits and high reliability through a secure technical solution

The system has high reliability because the only moving parts are fans that provide air circulation.

It is recommended to use an automated heat recovery unit for efficiency and comfort.

It is obligatory to filter the two air flows:

  • Fresh air should be filtered to reduce the intake of unwanted substances in a home
  • Damaged air must be filtered to avoid particulate matter on the heat exchange. Deposits decrease the quality of the heat transfer.

In this way the following benefits will be obtained:

  • The indoor air is permanently refreshed which leads to a high quality of life
  • Reduces the energy consumption required for heating and cooling by up to 25%
  • The optimum values ​​for relative humidity and temperature are ensured

Higher benefits at much lower costs

For a house with an area of ​​100 m2 with a thermosystem considered average on the Romanian market and a number of 4 residents, the cost of electricity is about 200 RON / year, and the replacement time of the filters depends on the degree of pollution in the area where the house is located. The operating costs are relatively low and they consist of the cost of electricity and filter replacement.

On average, the annual price of the filters is 400 RON / year for an area where the pollution is minimal and can increase up to 800 RON / year in the center of cities or areas with high traffic. Replacing them is simple and can be done by anyone. Using automation for this system will have considerable benefits in terms of quality of life and energy consumption.

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About EnergyPal

The founder of the EnergyPal brand, Lucian Anghel, has a vast experience in operating and maintaining buildings over 3,000,000 sqm in Romania. The experience gained over 15 years of facility management has led to launching EnergyPal, an energy efficiency concept, whereby customers benefit from the most cost-effective solutions for building operation costs. The EnergyPal team is staffed with over 8 years of experience in facility management and technical assistance. The staff is specialized in the fields of: smart metering, HVAC (heating and air conditioning), automation, insulation, lighting, preventative and predictive maintenance. The solutions and technologies used have the effect of reducing the operating costs of the beneficiaries, which allows for the financing of the savings made. Learn more about us on:


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