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Indoor air qualityIn my IAQ hydraulicscavengerpump articles I have long fussed and fumed over the need for companies claiming to be in this business to have testing capabilities. I came across Air Quality Sciences, which provides such services to hvac contractors. The company rents you the sampling equipment, tells you how to use it and provides accurate test results.UV light kills bacteria. Ozone kills mold and bacteria. Both have been used in IAQ remediation systems for years, and several companies displayed such wares. However, I was struck by the way these concepts were put together in a well-thought-out package from Sol Aire. Its Whole House Air Purification hydraulicscavengerpump System combines a germicidal lamp and an ozone generator in a single device. You simply cut a hole in the plenum and insert the active elements. Integral mounting magnets hold it in place. Plug it into a standard 120V outlet. The system turns itself on and off automatically by sensing air flow. Many new IAQ test tools were on display, but the one with which I was the most impressed was TPI''s Model 705 carbon monoxide analyzer. It reads CO levels out directly in ppm. It''s fast and easy to use.

Fused fluxes are melted in a furnace, chilled, then crushed and screened for size. These hydraulicscavengerpump pickup little moisture and recycle without alterations in particle size or composition. Bonded fluxes are powdered materials mixed dry and bonded together with hydraulicscavengerpump a silicate, pelletized, baked, broken up, and screened for size: the process permits hydraulicscavengerpump easy addition of deoxidizers and alloying elements. Bonded fluxes allow thicker flux layers hydraulicscavengerpump when welding and can be identified quickly by color. Disadvantages of bonded fluxes are their absorption of moisture and alterations during handling hydraulicscavengerpump in panicle size and composition due to particle segregation. Agglomerated fluxes are similar to bonded fluxes except that they use a ceramic binder. hydraulicscavengerpump They require higher baking temperatures during manufacture, which limits additions of deoxidizers and alloying elements. hydraulicscavengerpump Mechanically mixed fluxes are combinations of two or more bonded or agglomerated fluxes. They allow special flux mixtures for critical welds, but they may separate during storage, use, and flux recovery.