Water heater venting in an appartment complex

When the water heaters are located in the garage of an appartment building with 3 floors above, does the vent (terminating through the roof) need to be powered by a fan?

John, did you get the make and model? After Googling that, what did the installation instructions say? :smile:

Thanks for weighing in. The builder chose to go with on demand units because the didn’t want to go through the extra steps.