Tag Archives: HVAC Energy Consumption

The Impact of Clogged Air Filters On HVAC Energy Consumption

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As soon as the chill begins to set in with fall, the need for indoor heating starts to push electricity bills up significantly with each passing month. This continues until winter finally arrives and skyrockets electricity bills to ridiculous amounts. This is pretty much what happens in summer too if you happen to live in Texas, Florida or any of the other hot states.

In both situations though, it’s the HVAC system that consumes all the energy, which is not exactly unexpected. What most of us don’t realize is that it’s most likely those clogged air filters that are making the HVAC waste more energy than it should need. Let’s talk about the impact of clogged air filters on HVAC energy consumption

How Do Clogged Filters Affect Your HVAC System?

Before we can discuss how clogged filters affect electricity bills, it is important to understand how clogged filters affect HVAC units in the first place.

The role of an air filter is simple enough; it stops as much of the air impurities as possible from entering and circulating in the indoor environment. After a while, all that dirt, dust, debris, etc., that the filter prevented from getting in begins to congeal together, slowly closing off the airways.

Once the accumulated gunk becomes heavy enough, the HVAC system has to work extra hard to push air past these narrow airways. This is where the problem lies, as a number of negative effects from the increased exertion and dirty filters are seen.

The Effects of Extra Load on HVAC Units

Given that an HVAC system isn’t equipped to handle all that extra load on a regular basis, a number of negative impacts are seen as a result of clogged air filters.

  • The unit begins to consume more power, to be able to push air past the dirty air filters
  • The increased power consumption becomes evident, as energy bills surge in direct proportion
  • Excess load decreases the potential lifetime of an HVAC unit
  • The heat exchange mechanism can overheat and short-circuit
  • The cooling coil may freeze in absence of sufficient airflow for dissipating condensation during summer
  • Breakdowns become more common, further adding to the maintenance expenses
  • Both the heating and cooling capacities of the unit suffers; slower and less effective heating/cooling
  • Since the air is pushed through the gunk with force, it circulates all the dispersed pollutants throughout the house

How to Know When Your HVAC System Needs a Filter Change?

Some of the signs are pretty obvious, but you should act before they become too obvious and your unit breaks down in the middle of January! It can get a little costly to change air filters on a regular basis for sure, so try to get them from discountfilterstore.com.

Go through the following and it should provide a decent guide towards detecting the need for a HVAC filter change before the problems get too serious.

  • It has been more than three months since your last filter change
  • The filters are starting to look grey or develop spots
  • Increase in indoor dust accumulation
  • Increase in allergic reactions such as sneezing, skin rashes, etc.
  • Heating/cooling seems to be taking a lot longer than expected
  • Heating/cooling isn’t as effective as before

Air filters serve the vital function of keeping the indoor environment fresh and healthy for everyone, but those same filters can also become the cause for health and financial problems unless they are changed in time. As long as you keep track of the change cycle though, none of what we discussed should be a cause for concern.

How to Reduce HVAC Energy Consumption at Home?

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Heating and cooling account for more than 50% of home energy consumption. If you are paying a lot in the name of energy bills, your HVAC system is most likely the primary cause. It is vital to cut down on the energy consumption of utilities to save money (and energy). Energy companies such as American Power and Gas, suggest consumers and homeowners pay special attention to their HVAC system. as heating and cooling cost make up about 40% of your energy bills.

It may also be wise to consider switching to a system that operates on solar or other forms of renewable energy––Providing if it can be afforded.

Here are some ways you can reduce HVAC energy consumption:

Programmable Thermostat to The Rescue

HVAC system design can be made to consume less energy with the help of programmable thermostats.

The DOE recommends reducing room temperature to 15 degrees in winters when you are not home for 8-10 hours. Similarly, they suggest increasing the temperature by around 15 degrees in summers when you are not going to be home for half the day. This will help you save about 15% more energy annually.

The benefit that programmable thermostat gives you is that you won’t have to manually adjust the temperature every day. You can simply program it to change the temperature and save energy. It also has the added plus of operating on a timer so you don’t have to worry about leaving it on throughout the day.

Maintain The Coils Of Your AC Unit

The outdoor unit of the AC can allow dirt and debris to pass through it and gather around the coils and reduce the efficiency of the AC, as a result the unit consumes more energy to keep the room cool.

Keep your outdoor unit clean from dirt, fallen leaves, and other debris to make it work perfectly. If you believe that your outdoor unit needs cleaning, shut it off and use a vacuum to pull out all the dirt.

Inspect Air Filters 

Air filters need special attention as they can get blocked due to dirt and debris. They need to be replaced every season as damaged filters put extra pressure on the unit causing energy to be wasted.

Other than this, you should also replace the filters every now and then. This is not a very tough job and you can do it on your own.

Here’s how to do it:

  • Remove the filter and check for debris stuck in the filters.
  • Keep the filters under light to see if it’s able to pass through. If it doesn’t then you will have to wash the filters.
  • Clean the filters with a toothbrush, or another such tool first.
  • Put the filters in soapy water for a few hours, dry and see if the light passes again. If it does then you can re-apply those, otherwise, you may have to change the air filters.

The average life expectancy of air filters is about 2 to 3 months if they aren’t maintained. Otherwise, they can easily run for a year.

Out With The Old, In With The New

HVAC systems can be costly but if you have been using one for more than 10 years now then it’s time to replace it with a modern and an energy efficient HVAC system.

AC Coils of HVAC systems require regular cleanup

A Clean Way to Cool Down

You can also consult with your energy provider regarding making the switch to renewable energy services. You can also look into energy storage systems such as Tesla’s solar panels that can drastically cut your power bill and provide clean sustainable energy for your home.

The Verdict

Around 48% of US home energy consumption is directly attributable to HVAC use and heating or cooling. These are some of the most efficient ways which you can reduce the amount of energy consumed by your HVAC system.