Old thermostat has white,red, brown & green wires respectively, going to w,r,y,g connectors.

The new thermostat has w,rh,b,rc,G,O,& Y connectors. (RC/RH ARE JUMPED TOGETHER.)

My system is a standard heat/cool with attic air handler and outside compressor.

What goes where on new thermostat? Any help is greatly appreciated.

before you do anything turn off power to furnace/airhandler at breaker box
white = w
red = rh
brown =y
green =g
leave jumper in if your system has only 1 transformer

Thank you,thank you,wmproop! The wiring dir. w/new therm. Were (to be kind)very vague. Really had me stymied. Many thanks again.