7 easy ways to prevent HVAC water damage!

Here in the beautiful PNW we have grown accustomed to excessive rain and have picked up a few tricks on how to prepare ourselves. Dog inside? Check! Car windows up? Check! HVAC system fortification?...uhm…check??

HVAC units can cause and receive extensive water damage. Water may leak inside your home if things are not maintained properly. For units installed outside, you risk flooding and freezing.

1. Change HVAC filter regularly at least once a month to help prevent the unit from overworking, which can cause freezing and then defrosting on the evaporator coils, leading to water damage. Choose high-efficiency particulate air (HEPA) filters but check the instructions manual first to know what type of filter you need. If the filters are located inside the furnace or air handler, hire a contractor to change the filters.
   

2. Maintain the condensation drain line.

   • Check the condensation line opening when your AC is running to make sure you see water flowing to the drain. The amount of water that flows depends on the humidity level in the house.

   • Flush the drain with an algae inhibitor once or twice a year to prevent mold or algae from forming. Use a commercial solution or regular bleach.

   • If the drain line is already clogged , remove the paper filter and attach a wet/dry vacuum to the drain line to suck the clog out.

   • Properly connect and install the main drain line and emergency drain line. If you are not sure, check.

   • Also check that the pipe is oriented correctly as it might be knocked out of alignment.

3. Install a condensation pump to help excess water flow into the proper disposal drain. Additionally, install a safety float switch to automatically shut down the power to the AC unit whenever condensation builds up and there is a risk of water overflow.
   

4. Have your HVAC system inspected professionally so the technician can inspect and fix problems related to HVAC components like the ductwork, furnace flames, grills and registers, AC compressors, the thermostat, and more.
   

1. Higher Concrete Bases are one way to protect the HVAC unit from floodwater. Depending on the local 100-year flood level and where your home is located, this base can be several feet tall. A contractor will need to survey the area to determine the most functional height for the base, make sure safety codes are met, and pour new concrete into a form.

2. Building an enclosed wall structure to surround the HVAC unit will prevent floodwater from infiltrating. The contractor will need to evaluate the local 100-year flood level to confirm the best wall height. Other wall considerations must also be evaluated, such as sufficient space within the enclosure for servicing and an access point to enter the space.

3. Relocate the HVAC Unit on a ground floor or even in a basement. Removing the HVAC unit and reinstalling it into a second floor or attic space will protect it completely from floodwater but will need movement and redesign of the ductwork, drainage pipes and electrical wiring. For an HVAC design that is safe and functional on an upper-level floor, more than one contractor may be necessary.