DrySmart vs Dehumidifiers

Drying requires BTUs of heat energy to convert water from a liquid to a gaseous state. Terms like grains per pound, absolute humidity, relative humidity, and temperature are used in measuring and calculating atmospheric heat energy and determining how much of that energy is available to evaporate the water in wet materials.

DrySmart and dehumidifiers share the same objective:  create atmospheric conditions that promote evaporation, i.e., a high heat energy differential between the atmosphere and the wet materials.  The higher the differential, the faster the heat energy can be transferred from the atmosphere to the wet materials and the faster water will be evaporated. 

DrySmart has the potential to create a higher energy differential than dehumidifiers.  A simple example will illustrate this.  A water damaged building is ready for remediation. The building temperature is 72° F and the relative humidity is 85%. Grains per pound is often used to measure the atmospheric water content.  It also correlates to atmospheric energy.  85% R. H. at 72° F is 101 gpp.  At saturation (100% R.H.) it would be 119 gpp.

If dehumidifiers are set up, the following drying conditions might be created.  Removing moisture from the air, the dehumidifiers eventually bring the atmospheric moisture content down to 21 gpp.  Waste heat from the dehumidifiers raises the air temperature to 78° F; the R.H. is now 15% and the saturation point has increased to 146 gpp. 

If a DrySmart trailer is set up on the job, the following drying conditions might be created.  Fresh outside air at 48° F and 70% R. H (a typical spring and fall condition) is heated and ducted into the building.  The humid air is quickly displaced and the building temperature is raised to 104° F.  The gpp is at 35 and the R. H. is down to 11% and the saturation point is all the way up to 346 gpp.     

The DrySmart trailer’s drying atmosphere is far superior to the dehumidifiers. While the dehumidifiers’ grain depression is greater (80 vs 66 gpp), DrySmart’s saturation level is much, much higher (344 vs 146 gpp).  The difference between the air’s saturation point gpp and its actual gpp corresponds to energy available to evaporate moisture.

With restorative drying typically being done below 40% R.H., the difference between the gpp at 40% R. H. and the actual gpp is energy available to evaporate moisture.  For the dehumidifiers’ drying conditions this is 58 – 21 = 37 gpp.  The DrySmart’s is 138 – 35 = 103 gpp.  DrySmart has 278% more energy available to evaporate moisture than the dehumidiers!

The Drysmart Trailer is an outstanding tool in our box. I am more apt to call for it than some of the other drying trailers (dessicants) in our yard. The heat rise and cfm combined with it’s ease of use makes it a great product. And good job to you a…
Tim JankowskiAladdin's Cleaning and Restoration


Grand Rapids

Cedar Springs

United States