Blog

A roof opening is not automatically a ventilation design. Knowing when roof-mount hooded exhaust fans are required comes down to what the building must remove, where replacement air will enter, and whether the fan will operate reliably through rain, wind, snow, grease, dust, and process contaminants. For warehouses, manufacturing plants, agricultural buildings, commercial shops, and specialty facilities, a roof-mounted hooded exhaust fan is often the right answer when hot, contaminated …

A roof fan that looks right on paper can still miss the job by a wide margin once it sees real heat, duct loss, filters, louvers, and building pressure. That is why roof mount exhaust fan sizing should never start with fan diameter alone or a rough air changes per hour guess. The right approach starts with what the building needs to remove - heat, fumes, moisture, smoke, process air, or general stale air - and then works backward to the actual CFM and static pressure the fan must handle. …