I have a Rheem thermostat (model tst411mdms). I would like to install a wifi thermostat and I have not found one that has the v wire terminal. The v wire designation is for PWM output (Pulse Width Modulation). Do any of the wifi thermostats have this wire and do I need it? All the terminals on a Honeywell th9320wf5003 work except for the v and remote temp sensor, which I don't need.

This site may be some help. Pulse Width Modulation (http://tekmarcontrols.com/solutions/browsesolutions/radiant/33-support/glossary/85-pulse-width-modulation.html)