http://netvouz.com/noblex/tag/conservation?feed=rss noblex's bookmarks tagged "conservation" on Netvouz http://www.slideshare.net/noblex1/larger-number-of-species-becoming-endangered-says-igor-purlantov Scientists have discovered that animals and plants around the world are being killed off by humans faster than new ones can evolve. This is the first time this has ever happened since dinosaurs became extinct says Igor Purlantov. noblex Thu, 15 Mar 2012 23:27:09 GMT http://www.slideshare.net/noblex1/what-are-the-rooftop-hvac-units When rooftop units were first introduced some 40 years ago, they were considered by system designers and building owners to be a bare bones, low cost, simple solution to low-rise building HVAC needs. Low cost was the primary driving force for both manufacturers and users. But while they were popular with designers and owners, many maintenance managers considered them nightmares: difficult to service, prone to breakdowns, inadequately protected from the elements. Today, everything has changed. Gone is the concept of one size fits all. Buyers have more options, including practically all of the same features found in other types of building HVAC systems, from economizers for energy conservation and prewired interfaces for building automation systems to heat w noblex Tue, 24 Jan 2012 13:47:30 GMT