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Fire & Water - Cleanup & Restoration

Are Dehumidifiers an Effective Piece of Equipment After a Flood?

10/15/2020 (Permalink)

Wet carpet Call SERVPRO after your Wilmington flood.

SERVPRO Technicians in Wilmington Use Dehumidifiers to Remove Excess Moisture from the Air 

Dehumidifiers are a piece of critical equipment following a flood in Wilmington. Flooding by nature means that water is abundant in your home. After the flood water recedes and technicians extract excess water from your home, dehumidifiers, in conjunction with air movers, speed up the drying process.

Why is it Important to Calculate Grain Depression? Technicians Use Grains to Evaluate the Effectiveness of Dehumidifiers

Our professional team dealing with flood damage in Wilmington uses the grain measurement to determine a dehumidifier's effectiveness. To do this, technicians use a thermo-hygrometer to measure the difference between the air exhausted from the dehumidifier and the intake air. This difference is called grain depression. When the grain depression is not a big difference, it means that the dehumidifier in question is no longer sufficient.

What are the Steps to Measure Grain Depression?

  • Use the thermo-hygrometer to measure both the relative humidity (RH) and the air temperature coming out of the dehumidifier's exhaust.
  • Use the thermo-hygrometer to measure the temperature and RH of the air in the impacted area. This reading represents the intake air since it is from the impacted area of your home.
  • Use a psychrometric wheel or chart to determine the impacted room's gpp (grains per pound).
  • Subtract the exhaust number from the intake number to determine the grain depression.
  • Monitor and reset dehumidifiers and air movers to optimize drying capacity

The grain depression measurement is helpful when determining the usefulness of a specific piece of dehumidifying equipment. However, it is crucial to also measure the relative humidity and temperature in the room to facilitate an effective drying process best. Following a flood, contact SERVPRO of Hockessin / Elsmere at (302) 992-010 for 24/7 assistance. We make it, "Like it never even happened."

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