HVAC systems are a great way to maintain a comfortable indoor temperature all year round. However, the question is whether they have fresh air intake or they simply recirculate the same stale air over and over. This article takes a closer look into this issue so that you can gain a better understanding of these systems and of their mechanism of action.
To start with, if you have a split air conditioning system you should be aware of the fact that it doesn’t have any fresh air intake. The design of this system isn’t meant to allow bringing in the fresh air. This is why it is very important to clean these units on a regular basis, preferably at least once a year. Besides, you should replace their filters as often as needed, in order to avoid contamination with airborne germs and pollutants. On the other hand, split systems have the advantage of a lower price. Their installation is also easier. All these may compensate for a certain lack of fresh air intake. In addition, some may argue that hot, humid and polluted air from the outside could do more harm than good. These being said, it might be better for a HVAC system not to bring in the fresh air, as it would need to work harder to purify and cool down this air, hence increasing the operating costs.
There are some HVACs that provide fresh air intake. These systems are usually more complex. This fresh air intake is usually located on the ceiling, and it features filters that prevent dust and dirt from polluting indoor air. Such systems have a very smart functioning principle. They allow outside air to enter only in certain conditions of pressure and moisture difference between the air inside and the outdoor atmosphere. These systems are actually beneficial, as they help to maintain a safe atmosphere and constant temperature and humidity levels inside the building.
As a general rule, a percentage of 5% to 10% of fresh air is desirable. However, if your HVAC system doesn’t allow it, you’ll be fine without it, so you won’t have to replace it. Just make sure that you clean the filters and perform routine maintenance at regular intervals and you won’t have any problems. Also, keep in mind that a certain amount of uncontrolled and unfiltered air will enter your home anyway through various cracks and crevices. You won’t be able to seal your home completely, so you’ll always have this fresh air intake, whether you want it or not. In case you worry that your indoor air won’t supply you with enough oxygen, you can relax and forget about it. Your home isn’t a sealed container, so there will always be some air coming in through holes and cracks you don’t even know about.
If you want to know whether your HVAC system has fresh air intake, you can read the owner’s manual or contact the representative office of the manufacturer to ask for such details. You’ll have your answer right away.