Certified Facility Manager (CFM) Practice Exam 2025 - Free Practice Questions and Facility Management Study Guide

Directly fired water heaters should be avoided for indoor pools primarily because they have been linked to carbon monoxide poisoning incidents. These heaters burn fuel to generate heat directly within the water tank, which produces combustion gases, including carbon monoxide. In an enclosed space like an indoor pool, if proper ventilation is not maintained, the accumulation of carbon monoxide can pose serious health risks to the occupants. It is crucial in facility management to prioritize safety and health standards, and the risks associated with carbon monoxide make these heaters particularly unsuitable for indoor environments.

While there may be other considerations when choosing a water heater, such as energy efficiency, noise levels, and installation requirements, the critical health safety implications tied to carbon monoxide exposure make the association the primary reason for avoiding directly fired water heaters in indoor pools.