The thermal performance of an earth-air-pipe system constructed at Gulmohar farm house, Gurgaon, India has been studied. It has been used in a single pass mode to condition three bedrooms, a living room, a dining room, and a kitchen of a farmhouse. The performance of the earth-air-pipe system was first evaluated prior to the construction of the farmhouse. Accordingly, the temperature and relative humidity at suction and delivery points of the earth-air-pipe system were monitored in three seasons i.e., summer. monsoon and winter, After the construction of the farmhouse was completed, the performance of the earth-air-pipe system in question, along with performance of one of the living rooms of the farmhouse, was evaluated. The temperature and relative humidity of a conditioned room (living room of the farm house), delivery point of the earth-air-pipe system (located in the living room), suction point of the earth-air-pipe system (the hut in which blower of the earth air-pipe system is placed) and ambient air were measured. The cooling and heating potential of the earth-air-pipe system is estimated. The coefficient of performance of the installed system during summer, monsoon, and winter was found to be 7.9, 1.9 and 2.1, respectively. It is concluded that good thermal comfort conditions can be created reasonably in the building with such a system.