A/C units should be deep cleaned at least once a year, and twice a year in warmer climates where they get more use.

Coil Cleaning Can Affect Hotel Guest Satisfaction

Customer Experience Cleanliness

Here is how coil cleaning can affect your guest’s satisfaction and why you should clean your hotel’s evaporator and condenser coils annually.

How often do you clean the evaporator and condenser coils in your hotel’s heating and cooling equipment? Keeping an air conditioner regularly and properly maintained, including coil cleaning, can make a huge difference in your guests’ satisfaction. In its 2014 North America Hotel Guest Satisfaction Study, J.D. Power and Associates found that the greatest negative impact on guests is a poorly cleaned hotel room — and while it’s not always visible to the eye, air conditioners can have a huge effect on the room’s cleanliness.

Dust and debris can build up on the coils in an A/C unit, and the base pans beneath the coils can fill with mold, mildew and bacteria. According to Energy.gov, this makes a unit work harder and longer, and sometimes makes it noisy. It can severely decrease indoor air quality, which can be a problem for an allergic guest and can cause other health issues (and it can create an unpleasant room odor). A/C units should be deep cleaned at least once a year, and twice a year in warmer climates where they get more use. Units located on a first or second floor, where they encounter grass from lawn mowing, leaves and maybe even small animals, need more frequent servicing, too.

A professional cleaning service takes units apart and cleans everything, including the coils, fans, passages, base pans and filters. According to Green Lodging News, using a service company to maintain your air conditioners can extend units’ lives by three to five years. There are other benefits on top of increased guest satisfaction, as well: Keeping A/C units clean makes them more efficient and reduces in-room energy costs by up to 17 percent.

Air Filters

Air filters are the first step in A/C cleaning, and they need frequent attention. Dirty filters can reduce airflow and decrease the efficiency of your unit. They can also mean that the air that does get through carries dirt directly to the coil. According to Energy.gov, replacing a dirty, clogged filter can lower an A/C unit’s energy consumption by 5 to 15 percent. Some air filters can be cleaned and others need to be replaced; either way, this should be done monthly. Make sure, too, there are no curtains or furniture close to the air conditioners that block airflow and lessen efficiency.

Drain Pans

Beneath the coils, drain pans collect condensation and generally drain either to the outside or to the building’s sewer system. According to Energy.gov, dirt from coils can clog these drains, so it’s important to keep them clean.

Water sometimes sits in base pans for an extended time, becoming stagnant and allowing the growth of mold and odor-causing bacteria. As the fan recirculates air out into the room, this mold and bacteria can be distributed with it, impacting the health of guests with asthma or allergies and even discoloring walls or carpets.


Coils can be checked visually, and if they’re dirty they should be cleaned immediately, preferably by a professional service.

Whether a guest leaves online comments about the room being too cold, too hot or stirring up their allergies, having air conditioning units cleaned regularly, including coil cleaning, can have a big impact on your guests’ satisfaction and potentially bring multiple other benefits to your hotel.

Leslie Lang
Leslie Lang

Leslie Lang is an award-winning freelance writer in Hawaii who writes articles, blog posts, white papers, reports, books and other content about the hospitality, tourism and travel industries. She writes for trade and consumer magazines, brands, and marketing and communications agencies.