Well, I studied for 3 months, around 2-3 hrs each day. Weekends 8-10 and took final 2 weeks off from work to get ready for finale. I just wanted to finish it in my first attempt.
Passed HVAC in Wisconsin. Not sure how much I studied, probably in the 200 hr range. So glad to be done! Just one piece of paperwork away from being licensed!
I studied the MERM, specifically the heat transfer, fluid mechanics and thermodynamics sections. Did one NCEES practice test and reviewed the notes from a colleagues ME review class at the Univ. Of Wash. ( I did not take the class).