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Fire & Water - Cleanup & Restoration

The maintenance of the HVAC system in commercial buildings to prevent water damage

9/23/2021 (Permalink)

Blog summary: This SERVPRO blog discusses how to maintain an HVAC unit in a commercial building and arrest water damage at the initial stages.

Prevent water damage from HVAC in commercial buildings

A water leak in HVACs in commercial buildings can become a source of distress and damage to property and operations. SERVPRO shares below the maintenance tips for several components of HVAC.

  1. Air filters

A monthly inspection of air filters is a must to ensure the equipment is not overworked and isn’t causing the evaporator coils to freeze and defrost. Air filters can be inspected by following the operations and maintenance manual. In case the filters are located inside the furnace or air handler, it is advised to hire a professional to change the filters. In the presence of dust and debris, filters must be replaced as per the manufacturer’s recommendation. A reusable filter must be cleaned and dried properly before being reinstalled. HEPA filters (high-efficiency particulate air filters) are the best option but it is important to install filters that the HVAC needs. Depending on the size of the equipment, multiple filters may need replacement.

  1. Condensate drains

The condensate drains and drain pans must be inspected monthly, especially if the HVAC is working across the year to cool the premises. If dirt, algae, or other contaminants are found, the drain line should be flushed with an algae inhibitor once or twice a year. Promptly repair any signs of rust, which could indicate a water problem. Ensure that the line draining outdoors or a rooftop drain is pointed away from the structure of the building. Check for any clogs in the drain line and remove the paper filter and attach a dry/wet vacuum to the drain line to suck out the debris. 

  1. Air coils

A yearly inspection of air coils can help ensure the equipment is operating at maximum capacity. Low levels of refrigerant and dirty air filters are common causes of evaporator coils freezing up. Over-sizing an HVAC is another cause of freeze-ups as the unit becomes susceptible to short cycling, inadequate dehumidification, and significant temperature variations. Broken fans, blocked condensate lines, malfunctioning thermostats, and low pressure inside the system are other usual causes of frozen evaporator coils. 

Moreover, coils should be carefully brushed or vacuumed to remove dust and debris. The outdoor condensing units should be clean from grass clippings and other debris and must remain level for water to drain properly.

  1. Ductwork

When the ductwork is not insulated excess condensation will be formed inside the unit when the cool air comes in contact with warmer ducts. This can lead to leaks from the HVAC and the vents. The condensation can accumulate on the exterior surface of the ducts as well and seep into the ceiling, creating a perfect environment for mold, mildew, and dry rot. The fresh air supply ducts must be devoid of debris and, if necessary, filtered at the inlet. The ductwork must be inspected for dust, insulation, rust, condensation, and tight connections. Repairs at the first sign of condensation and rust will help save a lot of expenses.

  1. Condensate pump

The role of a condensate drain pump is to collect and remove the condensate water produced by the HVAC. If the pump breaks down, the water from the HVAC will collect inside the system and eventually overflow. The pump must be checked for any blockages or algae build-up in the check valve to prevent the water leak.


  • SERVPRO uses state-of-the-art equipment to bring the damaged property back to its original state. SERVPRO of Hurst-Euless-Bedford is always updating its fleet and equipment so clients in Hurst, Euless, Bedford, or anywhere else can quickly access the services. 
  • With over 1,700 US and Canadian Franchise locations, SERVPRO is strategically positioned to respond faster to an emergency of any magnitude.
  • The SERVPRO staff is highly trained in property damage restoration. They receive initial in-house training and constant skill up-gradation at the corporate training facility and also acquire the regular IICRC-industry certification.

For commercial water damage restoration, call SERVPRO of Hurst-Euless-Bedford today at (817) 595-0004 or e-mail at office@SERVPROheb.com

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