We are thinking of buying window fans for each of our bedrooms but are having trouble finding reviews and other consumer information. Home Depot has an SMC model with twin 9" fans that can be set on intake (both fans pulling air in from the outside), out (both fans taking air from inside and pushing it out), or circulate (one fan pulling air in, one fan pushing it out). Does anyone know about this brand?

We've also seen other models online by Honeywell, Holmes, and Lasko. The twin 9" design seems pretty common, but then single fans of 16" to 20" are also common. Can anyone recommend a brand and model?

Many thanks in advance for any recommendations.