Start Internet Explorer 5.5 SP2 or Newer! The system has not been tested with: Firefox, Opera, Mozilla or Netscape. Pick a Project Type. Enter your REAL email address, project name, and County (of the 41 target Counties), make a Utility selection. Enter your Project's Engineering Data. Press Calculate. Watch your email for the report. When you are finished, please close your browser window. There is a 2 hr limit on your visit. The system will timeout after 2 hrs. Currently we are running v1.1.A of the Calculator which features defect fixes and the incremental addition of eGrid 1999 and 2007, as well as new Water/Wastewater models. If you have a problem with the system please send an email to eCalc Support so we can continue to tune the system. The Calculator represents Phase 1 of funding from EPA and TCEQ. The follow on products are IC3 and TCV - Read more at here. Portions of the eCalc technology are used at the Energy Systems Lab to support work by TCEQ, SECO and EPA. eCalc PDF Files Cool Roofs Report DOE-2 Program Report F-Chart Program Report PV F-Chart Program Report Inverse Model Toolkit Report eCalc Master Report © 2006 Energy Systems Laboratory, Texas Engineering Experiment Station, Texas A&M University System          e2Calc Web, database, and modules are © 2006 Energy Systems Laboratory. Portions © US DOE, ASHRAE and FChart Software - e2Calc, eCalc and the ESL Logo are TM 2006 Energy Systems Lab.