Mechanical Minute-ish: The Impacts of Neglecting HVAC Coil Cleaning

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In the second installment of our Commercial HVAC Coil Cleaning Series, we highlight some of the negative outcomes which arise as a result of neglecting the cleaning of your commercial HVAC system’s coils and why coil cleaning should be a part of your HVAC preventative maintenance program.

If you haven’t seen Part 1 of our Commercial HVAC Coil Cleaning Series: HVAC Coils and What They Do – check it out!

Mechanical Minute-ish:  Commercial HVAC Coil Cleaning Series Part 1

Video Transcript

Coming up – Part two of our Commercial HVAC Coil Cleaning Series – Why coil cleaning should be a part of your company’s Preventative Maintenance program on today’s Mechanical Minute-ish.

Coil cleaning is an important but often forgotten practice within commercial HVAC preventative maintenance programs and while neglecting your coils does save money in the short term, the adverse effects could cost you big money in the long run.

Neglect effect number 1 – Higher energy costs.

As we discussed in part one of our coil cleaning series – HVAC coils are responsible for the system’s heat transfer.

As dirt and debris collect on a unit’s coils, it becomes increasingly harder for the designed heat transfer to occur.  Over time, you’ll be paying for this loss of efficiency through your energy bills.

In fact, studies show failure to maintain clean coils can cause your HVAC system to utilize 20-50% more energy.

Neglect effect number 2 – Equipment Lifespan Reduction.

With the reduction in heat transfer efficiency, the unit’s compressor which moves refrigerant through the coils if forced to work longer and harder.

Dirty coils mean the system’s cooling capacity can drop by as much as 30% and with the extra load placed on your compressor, there’s a higher likelihood it may fail which of course can be a very expensive fix.

Neglect effect number 3 – Poor air quality.

Dirty coils are ideal breeding grounds for bacteria and mold.

Remember, the air that passes through the evaporator coil has already been filtered and does not go through another filtering process before entering your building.  This means if your coils are extremely dirty, bacteria could get disbursed through your space diminishing the quality of the air.

That leads us into the final point:  how often should you clean your coils?

Because evaporator coils are in contact with filtered air, they don’t need to be cleaned nearly as often as condenser coils which we recommend cleaning at least once a year.  However, don’t completely neglect your evaporator coils.  They should be at least checked during your PM visits to see if they need a cleaning.

That’s all for today’s Mechanical Minute-ish.  We’ll see you next time for the final installment of our Coil Cleaning Series.

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