I may have been MIA for a year or so from these forums but being on the cutting edge has it's limits. So I wanted to take some time to announce a new technology I've discovered in my daily minutia. This Energy Valve is a pressure independant valve with a magflow meter infront of it (energy meter) that controls to +/- 1.5°F of your design coil delta-T on the waterside. Belimo has proven that the coil performance curves are NOT linear. They offer FREELY for us unergy modellers to incorporate into our models. I am in no way affiliated with Belimo, but have specified their products within my design. This is significant of a game changer, I had to share with the community here. http://blog.belimo.com/-0/?Tag=Belimo%20News 

Trace700 & eQuest PlugIn https://www.belimo.us/ishop/cms/sh/news_events/plugin.html?__hstc=104483103.bcbd54dbb4c6d5ec30bd02da922ea0b3.1354131127454.1354131127454.1354131127454.2&__hssc=104483103.1.1354131127454

Bob Rybka (Belimo - Regional Application Consultant)