Greenheck has redesigned its premium model SP bathroom exhaust fans. The fans are available in six sizes, SP-A50 through SP-A190, and have sound ratings as low as 0.3 sones, company officials said.

E Instruments has released its new AQ Comfort indoor air quality monitor. The compact, handheld device has an easy-to-use menu system and real-time data logging that measures carbon dioxide and carbon monoxide gases, temperature, dew point, wet bulb and relative humidity percentage with immediate response time, officials said.