What is Trane's comfort R(r)? What equipment is needed to take advantage of it, if it is an advantage.
comfort R is the enhanced mode setting of the variable speed air handler. the variable speed air handler can be used with most trane condensors and heat pumps but works exceptionally well with the xl16i and 19i.
Comfort-R controls the blower. Will start off very slow for a min to get the coil cold, then goes to about 80% speed, then after 10 min, then goes to full speed. It will work with any Trane outdoor unit. If you want a better humidity removal, best to have a TXV coil, and add the Honeywell IAQ t-stat or a basic humidistat to keep the blower running at a slower speed.
Honeywell make great t-stat, and I've been very pleased with mine, I think it's worth the money of what all the IAQ can do for you. On mine, I have it set up to control the fresh air damper, 2 stages of heat, humidifer, outdoor sensor for Frost Guard, and slow down the blower if humidity is too high in the summer (Dehumid Mode).
Honeywell uses CPH (Cycles per Hour) to control the temp, and does a good job, there is no temp swing in the home. There is a Droop in one of the set mode in Heat Pump only..