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Two times a 15-58? Maybe when I sold the old UPS 20-42 back in the late 80's for $130.00 or more! Without giving out our pricing to all the Wallies out there (AKA my competition) let's say contractors will be paying mid to high $200 (but under $300). I'll discuss this mis-understanding with our guys - sorry bout that chief (ya, I'm a Get Smart fan)!
Describing the Auto Mode is kind of difficult to explain even for me - it would be great to say "hey, it works, don't worry about it" but that ain't good enough.
Auto mode turns the build in "auto set-back" on. The ECO (and Stratos) has fuzzy logic that reads low system minimum temps vs time over the first 24 hours of operation (no actual setpoints - it learns the system on it's own). When it sees an extended low temp and slightly longer time period longer than what is saw in the first 24 hrs it understands there is a no heat demand and an opportunity to kick down to min speed.
When there is a call for heat the pump sees this as a temp change and immediately comes out of set-back and modulates it's speed based on what the system needs (as it did prior to going into set-back).
The auto mode can be turned off at any time (rotate the red "head setting" adjustment button CW) or reset (rotate CW and back CCW). The initial system warm up period might not be reality - the pump might need to be "re-taught".
Hope this is a better explanation...
Manufacturing in the US - I agree completely with your feelings. We currently build municipal water products in Thomasville Georgia, assemble/test HVAC in Chicago (alas I can not honestly call this "manufacturing"). Will we fully manufacture HVAC in the USA? Better question is how soon (can't let out too many secrets in one post right?).
Did you attend our wind-up? What a blast - to see Judy, Dan and the crew let loose was great. Man, Judy works so hard and gives so much back to the industry - nice to see her relax and enjoy...