Want to try a MUCH cheaper option?
PERFECTION ! Thank you thank you thank you.
Gonna order a dozen - I like backups
What is you put several in the air intake on your central air system?
There are units designed to slot right into the intake after the filter.
That's going on my next house's system, along with an air exchanger and humidifier.
Think I have a better design that the other exchangers I've seen - and way less expensive too.