by Dan Jape of Reliable Heating & Air
The floods that struck Atlanta brought many tragic results included the destruction of life and home for many and my heart goes out to all those affected. Sometimes one is at a loss to understand why such occurrences happen and how they become so terrible out of something so necessary such as rain. The floodwater also can have long reaching affects on our lives and safety unless properly cleaned up and treated.
Many basements and crawl spaces were flooded with water that was laden with bacteria and byproducts of sewer due to the overflowing of the drain water systems and septic tanks. This water made its way into walls, carpets, floors, and most importantly, furnaces and water heaters. The modern day furnace is lined with insulation panels that absorbed all this very dangerous and polluted water and it cannot be removed the fibrous material. These panels have to be replaced as do all the controls devices, limits, fan motors and gas valves. The furnaces have to be removed and completely taken apart and scrubbed and disinfected and by the time all the damaged parts are replaced, one would come out much better by replacing the entire furnace. The cooling coils are also insulated with fiberglass panels that soaked up this dirty infected water and should also be replaced to ensure safe indoor air quality.
Water heaters that have been under water are extremely dangerous, as they often will relight after drying out, and people assume sine they fire up and heat water, they are safe. This could not be farther from the truth, as the water and sediment that seeped in gas valves, burners and safeties can cause trouble in the days that follow the flood. One should never attempt to light a flooded water heater without a complete replacement of the controls and burners or replacement of the entire heater. These appliances are far too cheap and the consequences of a malfunction are too severe to chance using a damaged and flooded heater.
Outdoor air conditioner condensers are designed to sit outside in the rain and they faired much better in the floods than furnaces. If an outdoor unit flooded and the controls did not get immersed under water, there is a good chance the unit can be cleaned out and put back in service. If the control box and the electronics got wet, they will need to be replaced. The coils should be acid washed and thoroughly cleaned before the unit is operated.
The two mail concerns with flooded systems are safety from gas valves and controls that were damaged and dangerous indoor air quality from fecal matter and sewer water that was mixed in with the rain water. The last area of concern was ductwork and insulation that got soaked in the flood. All duct work that got saturated needs to be replaced regardless whether it’s metal or flexible. The insulation on ductwork will never dry out to properly insulate the ductwork after it has been under water, and the ducting itself can’t be properly cleaned to make sure it is clean and disinfected to not spread airborne pollutants.
The floods hurt many people and cost untold millions in damage to homes and property. Make sure you properly repair and replace your homes heating and cooling systems along with your water heating appliances to make sure you are safe and secure and all systems work as designed.
