Did my Water Heater just get Noisy?

There have been some complaints by  Brittan Heights ground level residents that their water heaters have become noisy. This can be particularly bad since the water heater closets are next to the master bedrooms downstairs.

The HOA has been installing some new hot water heaters and these new heaters are different then the older units. The older units sat in their closets with passive vents that allowed fresh air to flow inside the closet to burn the gas used to heat up the water.

The new water heaters have some sort of fan system that blows air into the heater. I was told this might be a new code requirement. This creates some mechanical noises when the heater is warming the water. Some residents have asked the HOA to mitigate the noise. The HOA has taken steps in some cases by placing the air intake for this fan system higher and further away from bedroom windows, plus adding more sound dampening material in the heater closet space.