It dropped below 60 for a while and had barely any activity, but my house has warmed up now and it is moving along fine. The 1450 yeast range is 60-70 degrees and mine has been mostly in the mid to low 60's. I think max at 66 degrees. Everything looks good now, my only concern is being gone for the weekend and maintaining under 70 degrees when it's getting into the 80's this weekend.
My concern was if anything happens if it's too cold like fruity esters or somethng along those lines.