Richard JH. RJH-90L/D Industrial Dehumidifier Price in Bangladesh. Richard JH. RJH-90L/D industrial dehumidifier features auto defrosting that helps to work at a low temperature. It comes with a 90-liter water tank and an indicator to show the water level. This dehumidifier's cover range is 1050-1400 sqft. Also, it is fully rustproof due to its steel surface. Additionally, includes 4-wheels that make it portable and moveable to any place.