The odor from the composter will not normally be noticed on the ground outdoors if the exhaust pipe terminates at least 12 in. (305 mm) above the peak of the roof. If the exhaust pipe is lower than the roof peak, odors from the exhaust pipe might be swept to the ground through wind downdrafting.

Odor filters, can be installed in the exhaust pipe after the fan and before the pipe terminus

Some manufacturers, such as Sun-Mar Corp., include air diffusers that mix the exhaust gasses with fresh air to dilute the odors and help promote updraft.