TAM Air is an eight channel microcalorimeter from TA Instruments, designed for sensitive and stable heat flow measurements. It is an ideal tool for large scale calorimetric experiments requiring sensitivity in the milliwatt range. The operating temperature range is 5-90°C. All calorimetric channels are of twin type, consisitng of a sample and a refernce chamber, each with a 20 ml volume. the thermostat employs within ±0.02°C. the high stability of the thermostat makes the calorimeter well-suited for heat flow measurements over extended periods of time, e.g. weeks.