is this for a tank room or for your house? they both do completely different things thats why i ask, a dehumidifier is just going to physically pull humidity out of the air and send it down the drain in water form, an ERV is just going to exchange the stale air inside with fresh air from the outside, they are used in new homes because they are built so tight that the cleaning solutions and other products that create noxious fumes are dangerous to our health (why do you think kids are more sick and have more allergies nowadays) and a tightly built house keeps that all in
also the Santa Fe dehumidifiers cant pull out as much unless you are talking about the crawl space santa fe one
as for which one i would personally choose here in ohio (if this was going to be a tank room only unit) i would go with the ERV, exhaust fan, and dehumidifier for these reasons
-summer is high heat and high humidity - the same conditions that would be in the tank room, this is where the dehumidifier would do its job while the exhaust fan pulls the salty stale air out and the ERV does the same thing and bring in fresh air
-winter, turn off the dehumidifier and just run the ERV and if you have to, the exhaust fan - the winter is low humidity and cold temps, perfect for exchanging air in a tank room
I actually am going to most likely use at least the dehumidifier and exhaust fan from aprilaire because i get amazing deals on them and i feel they are the best products for indoor air quality