The acclimatizer is for weather (rain and snow) the heater or cooler allows bees to operate in different climates (hot or cold) cross your hermit bee with a temperate bee to get a hermit bee that will operate in the temperate forests. You'll need to check the offspring under a microscope to make sure they're temperate/temperate if you're after a bee that will produce stable offspring. Hover over the lower half of the microscope results. I'd suggest crossing with a worker bee for productivity or twilight bee for activity. Add the hermit to the other bee so you don't need a cooler for the queen.