This article describes the remodeling of a hospital kitchen in which workers experienced high temperature and humidity levels as well as turbulent airflows most of the year.

HEMCO has released a complete line of belt and direct drive exhaust blowers which are chemical resistant and available in standard and explosion proof models. Company reps said the blowers are designed to operate effectively and efficiently to remove hazardous fumes from a fume hood.

The new Mega-Stack option for Greenheck’s Model FJI FumeJet® fume exhaust fan offers extended discharge from 10-15 feet in overall stack discharge height, making it ideal for low flow applications requiring higher plume rise.

Larson Electronics released an 80-watt explosion proof 12-inch exhaust fan recommended for use in hazardous locations and with toxic gas sensors (not included). This 850-cfm unit is weather resistant and wall mounted featuring internal motorized and external fixed louvers.

Size and configuration are important, but don’t overlook other key factors that can help provide the best return on investment and total cost of ownership over the life of the system.

Heat Pipe Technology (HPT) is now offering a “split passive” HRM-V™ with Dynamic Seasonal Offset™. HPT says its growing line of heat pipes offers economical and reliable energy recovery from building exhaust air for preheating or precooling of ventilation air.

Greenheck’s newly designed Premium Model SP bathroom exhaust fans now offer low sound ratings as low or less than 0.3 sones. Available in six sizes, SP-A50 through SP-A190, the fan features insulated housings and vibration isolators between the motor and housing to contribute to quiet operation.

Greenheck says its new FumeJet pre-engineered, centrifugal fume exhaust packaged models offer extended discharge to reduce and prevent exposure to harmful fumes and odors outdoors. Designed per ANSI Z9.2 standard for local exhaust systems, Models FJC and FJI aim to provide a compact footprint with motors and drives located under a common weatherhood.

Many methods await when it comes to reducing exhaust rates. Fortunately, engineers can avail themselves of multiple tactics, from the hood specification to proper commissioning and air balance.

Greenheck was awarded second place in the 2014 Wisconsin Society of Professional Engineers New Product Competition in the Large Company Category for its Variable Geometry Nozzle used on laboratory exhaust systems.