HPP IPP Plus Constant Climate chamber Plus Cooled Chamber $6000 NEGOTIABLE!!!!!! Appliance can heat the working chamber up to 70C and cool it down to 5C. Low noise, long life and energy-saving Peltier cooling and heating technology is used for this. In heating operation, a part of the required energy is extracted from the surroundings (heat pump principle) Additionally, the humidity in the interior of constant climate chambers HPP can be regulated between 10 and 90% RH (relative humidity). The humidity is increased by water from a tank being evaporated and fed into the interior, and is reduced through condensation on a Peltier module.