The constant climate chamber HPPeco with the new ADVANCED PELTIER TECHNOLOGY has more than earned the 'eco’ epithet. In continuous operation, it works around 90% more energy efficient than compressor-cooled devices, does not require any refrigerant and is thus nearly maintenance-free. The temperature control from +0 ºC to +70 ºC and the active humidification and dehumidification from 10% to 90% rh are optimally tailored to the requirements of stability tests in pharmaceutical industry (Q1A).