The Trenton Refrigeration Quiet Unit operates at 55 dBA, which sources say is 15dBA lower than conventional style condensing units at 70F, full speed. The Model 7899 Gas Sniffer by E Instruments International is a portable, rugged, and easy-to-use leak detection tool that was on exhibit at the recent 2013 AHR Expo.
The Model 7899 Gas Sniffer by E Instruments International is a portable, rugged, and easy-to-use leak detection tool that was on exhibit at the recent 2013 AHR Expo. The 7899 is equipped with a highly sensitive tip to find small leaks of any combustible gases and hydrocarbons from piping and/or appliances. These include natural gas, methane, propane, butane, LPG, and more. The 7899 Gas Sniffer Includes an 11-in., flexible probe, automatic zero-drift adjustment, and a large visual LCS and bar graph display
The Trenton Refrigeration Quiet Unit operates at 55 dBA, which sources say is 15dBA lower than conventional style condensing units at 70F, full speed. Other features include high efficiency, compact 
design, minimal product footprint, optional wall mounting kit. The unit uses Copeland or Tecumseh compressors, and scroll and hermetic compressor models are available.
