Which AirScape should you choose?

So start with this rule of thumb, then factor in the considerations below:

Basic system sizing guidelines

objective: if you just need to drain the heat from stuffy upstairs bedrooms at night, this requires less airflow than attempting to eliminate the need for A/C use throughout the house;
climate: in a more humid climate, you’ll want more air movement because humid air is not as naturally cooling; the maximum area numbers in the chart above assumes a climate where nights are cool and dry;
single-story vs two-story: two-story homes with upstairs bedrooms require somewhat less CFM, as the heat buildup problem is more concentrated;
oversize if you can: where budget permits, we always recommend going for more CFM rather than less. Running the 1.7 on low delivers the same air flow as the 1.0 on high, except it’s significantly quieter. And you’ll have the high setting “in reserve” for when you really want it. In fact, where budget is not a consideration, we recommend the 3.0 for most situations—it’s both our quietest and most powerful unit.
undersize with caution: in some situations, you can get away with under-sizing but, in our experience, while nobody ever regrets over-sizing, the same cannot be said for under-sizing. We always recommend going for more CFM to make sure the equipment meets your expectations.
go big for A/C replacement: if you are interested in aggressively reducing or replacing A/C use, we strongly recommend upsizing.

Recognizing there may be certain technical differences in our products that may play a role in your decision, this chart outlines those differences:

model	AirScape 1.0	AirScape 1.7	AirScape 3.0
number of fans	two	four	one
max power	70W	140W	360W
max airflow (CFM)	1000	1700	3000
efficiency	14.3 CFM/W	12.1 CFM/W	8.5 CFM/W
noise (sones, high/low)	3/2	3.5/2	2/1
insulation	R-22	R-7	R-4
vert clearance req	29”	13”	36”