The Earth is what we all have in common.–Wendell Berry
A fact of modern building construction is that most cooling is produced by rooftop units. Improving the energy efficiency of rooftop units and connecting the sizing and operation of them to actual demands in the space would produce significant energy savings. Instead, most rooftop units are (over) sized by rule of thumb, using a tons... Continue Reading →
Recently, I investigated the use of a variable refrigerant flow system with ground loop condensing for a school HVAC renovation. For the building in question, the ground loop was estimated to cost $405,000, and the savings produced would be expected to show an 8-10 year payback in order to be considered. I used Mitsubishi equipment as... Continue Reading →
A few years ago, I helped a hundred year old local high school modernize. Elder High School is a well known Catholic west side boys school with a strong alumni base. The original building was built in 1922 and there were major additions in 1959 and 1963. The school enjoyed a lot of support from... Continue Reading →
If you do a google search with those search terms, you won't get any exact hits. The hits you get will be regarding residential systems, which are much simpler. For residential applications, only the efficiency of the equipment itself (condensing unit and matching indoor A coil) is considered, not system efficiency or the combined efficiency... Continue Reading →
Innova Engineering, Inc 