Is there any way to obtain all the coefficients listed in APPENDIX C, the methodology for the envelope trade-off calculations? Even better would be a text file with all the equations and the coefficients. >> Christopher Jones, P.Eng. Suite 1801, 1 Yonge Street Toronto, ON M5E1W7 Tel. 416-203-7465 Fax. 416-946-1005 email cj at enersave.ca