Better Ventilation and Heating and Cooling
Have you ever wondered what HVAC stands for and why is ventilation important?
HVAC is the abbreviation for Heating, Ventilation, and Air Conditioning.
Heating And Cooling Melbourne
We all have heating and air conditioning in Melbourne, but do we ever think about the ventilation required to keep a home and its occupants healthy with the air they breathe?
Healthy and fresh indoor air is essential for a high quality of life.
When the air quality is good, it is much more pleasant to work without having to open the windows all the time and come home to fresh air.
Moisture, odours, and other pollutants can accumulate in the home without a ventilation system to provide fresh air.
A ventilation system uses ducts and fans to circulate fresh air rather than relying on airflow through open windows or air vents.
Ventilation is one method of supplying fresh air to a home or office space using passive forces such as wind speed or pressure differences between the inside and outside.
Less fresh air enters and leaves home as homes become more airtight due to improved window sealing and the elimination of gaps in floors and walls.
Better airtightness means that indoor air pollution from sources such as your gas stove top, cleaning products, gas heating, and mould spores are contained within your home. This is why good ventilation is essential, especially in colder weather.
Ventilation also aids in the control of moisture, which can lead to mould growth and structural damage.
Let's define ventilation and the various types of ventilation strategies.
- Why do we require it?
- And why do we require it in our homes or buildings?
Ventilation is the process of bringing fresh air into a building or room and distributing it throughout the space. The primary goal of ventilation in homes is to create a healthy environment for people to breathe in.
What is the significance of adequate ventilation in homes and buildings?
Adequate ventilation in a building improves air quality by removing pollutants and CO2 while also controlling humidity and lowering the risk of condensation. Improved energy efficiency and thermal comfort are also possible.
Various contaminants can impact air quality, ranging from low-level irritants (dust, pollen) to radon and volatile organic compounds.
If the humidity is too high in damp or colder areas, especially in uninsulated buildings, there is a significant risk of condensation, leading to mould growth and other health problems.
Asthma rates in Australia, for example, are high by global standards, and poorly ventilated homes have had a significant impact on the respiratory system.
Furthermore, many people who have moved to Australia from cold climates report that their homes in Australia are more challenging to heat than in countries where temperatures fluctuate.
- Mechanical, and
- Hybrid (mixed) ventilation
Natural air circulation
The majority of Australian homes rely on natural ventilation, a combination of open windows and structural flaws (gaps and holes around windows and doors).
This type of ventilation is mostly ineffective; good natural ventilation is dependent on natural pressure and temperature variations. The best designs employ crossflow and chimney principles to create airflow into and through a building.
Open windows or doors allow for natural ventilation; however, people keep their homes closed all year because of ducted heating and cooling.
Why can't we rely on natural ventilation to provide fresh air?
Natural ventilation is unpredictable and uncontrollable.
Natural ventilation is affected by the house's airtightness, outside temperatures, wind, and other factors.
Modern homes are so airtight to ensure no energy used for heating and cooling is lost.
In mild weather, natural ventilation may not be sufficient to remove pollutants from some homes.
In addition, in windy or extreme weather, a poorly sealed home becomes draughty, uncomfortable, and expensive to heat and cool.
As a result, a mechanical ventilation system is required.
Furthermore, ventilation is still an issue in Melbourne's older homes. Thermal insulation measures implemented at the time frequently resulted in insufficient outside air passing through the cracks of windows and doors. This creates a potential conflict of interest between reasonable thermal insulation and the need for fresh air, which mechanical ventilation systems can help to resolve.
Ventilation by mechanical means
Most Australian homes are unfamiliar with mechanical ventilation, but many have used it in other buildings such as offices and hospitals.
Heat recovery mechanical ventilation (MVHR).
These provide consistent ventilation to maintain the high indoor air quality in occupied buildings.
It introduces fresh, filtered air into the building while also removing damp and stale air.
Mechanical ventilation provides consistent, controlled fresh air.
Mechanical systems are frequently considered unnecessary for homes, but the varying Australian climatic conditions encourage us to have better-sealed homes. As a result, improved ventilation and air quality have become increasingly important.
Mechanical ventilation, which uses fans to move air into and around a building, provides a solution to this problem. Fans control mechanical ventilation. Fans can be installed directly in windows or walls, or air ducts to move air into or out of space. This system eliminates indoor pollutants such as CO2 and volatile organic compounds (VOCs).
A balanced mechanical ventilation system has an air supply and exhaust tested and matched to the design specifications.
The Advantages of a Ventilation System
They have improved indoor air quality. However, indoor air can be more polluted than outdoor air, and the average Australian spends 90% of their time indoors.
By removing allergens, pollutants, and moisture that can cause mould problems, ventilation systems can significantly improve a home's air quality.
More power. You have no control over the source or amount of air entering the house when homes rely on airflow through walls, roofs, and windows for ventilation.
The proper ventilation system will draw outside air from where it is of the highest quality. For example, you do not want air from a damp crawl space or your garage, as well as cars with their engines running, to enter your home.
Appropriate locations for ventilation and exhaust include smaller rooms that can have condensation and mould issues, such as small bedrooms and bathrooms.
Mechanical ventilation systems provide a constant flow of outdoor air into the home while also filtering, dehumidifying, and treating the incoming outside air.
If you choose a mechanical ventilation system, make sure the unit and its installation meet Australian Standard (AS) 3666.1 “Air handling and water systems of a building – Microbial control.”
The required flow rate and noise level will be determined due to this. Furthermore, the unit must meet AS 1668.2 “Mechanical ventilation for acceptable indoor air quality.”
Heating, cooling, and ventilation are all included.
With your ducted heating and cooling system, you have more options for improved ventilation.
We can tell you which brands have stand-alone ventilation products. Daikin is one such brand that offers MVHR systems.
Air conditioners can do air purification
Ionisation filters are available on high-end air conditioners.
These are capable of dealing with small amounts of pollution daily.
All air conditioners include dust filters, but for smaller particles like smoke or CO2, you'll need more than just a dust filter.
Filters for ionisation
Ions (charged particles) are produced inside the indoor unit of an air conditioner and are used to trap or break down pollutant particles such as dust, pollen, or bacteria.
Ions bind to unwanted particles and break them down by:
Changing the particle's electrical charge causes it to be attracted to a surface where it is trapped.
HEPA filters are still the most effective purifiers.
A HEPA filter (high-efficiency particulate air) is the best way to filter out very fine particles such as smoke, mould spores, pollen, and viruses. You'll often see these advertised on vacuum cleaners to stop the spread of fine dust and particles.
HEPA filters are dense filters that cannot handle high air flows through the filters. Therefore, they are unsuitable for air conditioners that must disperse large amounts of air.
If you're looking for an air purifier, a smaller stand-alone system might be best.
Do you require professional assistance with your home's or building's ventilation system?
So, why wait? Please get in touch with us right away!
Beyond Heating and Cooling professionals are highly knowledgeable and have completed many residential and commercial ventilation projects.