HVAC Humidity & 5 Reasons Behind Air Conditioner Ineffectiveness


Apart from cooling your space, an air conditioner also removes excess humidity from your space. But then why you’re feeling sweaty and uncomfortable even when the cooling system is on?

When you have excess humidity in your house, molds and bacteria will grow exponentially and make everyone in your house sick. Besides, if you have someone in your family who has a respiratory problem, mildew and microorganisms can create medical emergencies. That’s why you must solve your HVAC humidity problem as soon as possible.

Here are the five reasons why your air conditioner is ineffective in removing the excess level of HVAC humidity from your space.

5 Reasons behind Air Conditioner Ineffectiveness in Removing Excess Humidity

1.   Over-sized HVAC Unit

Yes, if your cooling unit is oversized compared to your home, you’ll face excess humidity problems. Here, AC size is the capacity of the cooling system, not the physical dimensions.

When you buy an oversized unit for your space, its compressor will frequently turn on and off, which is also known as AC short cycling. As a result, your cooling system won’t get enough time to remove humidity from your space. Again, when you have this issue, your cooling unit will use more power.

If you’re currently using an oversized HVAC unit in your house, you’ll have to replace it with a new one that matches your home’s size. And for this, you should take suggestions from an HVAC expert.

An HVAC expert will measure your space and calculate the required HVAC system’s size for your home.

2.   HVAC System Has Only On/Off Feature

If your AC has only a turn-on and off feature, you’ll have excess humidity in your home. Having a single-speed cooling system is equal to having an oversized HVAC unit. Let me explain why.

When you have a single-speed AC unit, it’ll run at full blast until it reaches your desired temperature. And when the cooling unit reaches your desired thermostat temperature, the AC compressor will shut down. Again, when the temperature gets lower than the thermostat temperature, the AC unit will start cooling again.

Because of this mechanism, a single-speed AC never runs continuously and causes excess humidity problems in your home.

You can replace your AC with a VRF system. VRF system can operate at minimum energy consumption and remove excess humidity at the same time.

3.   HVAC System is Too Old to Remove Excess Humidity  

Like any other device or machine, HVAC systems become inefficient after a certain period. If your cooling system is more than 10 years old, there is a high probability that the parts of your system are in bad shape and responsible for your high humidity issue.

Again, if you haven’t performed regular air conditioner maintenance service, this situation can get even worse.

To solve this problem, you have no other option than to replace your old cooling system. With a new cooling system, you won’t have any excess humidity. Besides, a modern HVAC unit will allow you to reduce your home’s power usage.

4.   Setting Thermostat Fan to On

Some homeowners have a misconception that excess moisture will be removed from the house if they just turn on the AC fan. But when you turn on the AC fan only, it makes the humidity condition even worse.

When only the AC fans are on, it makes the excess moisture circulate in your home instead of removing it from your space. As a result, the humidity level stays at the same level, and you start to feel uncomfortable. That’s why during those hot and humid days, instead of turning on the AC fans, always try to keep the AC on.

5.   Negative Air Pressure

If your home has poorly designed ventilation, you’ll have negative air pressure, which will eventually lead to humidity issues.

Due to negative air pressure, all the muggy air from outside will enter your house. As a result, even a modern air conditioner system won’t be enough to remove excess moisture from your space.

To solve this problem, you’ll need an HVAC professional and redesign your home ventilation.

See the summary of this content here – 5 Reasons Behind AC Ineffectiveness [Infographic]

5 Reasons Behind AC Ineffectiveness
5 Reasons Behind AC Ineffectiveness

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