14� ? They should be fine. Even w/o heat, they didn't get any wind. At 7-1/2 ft tall, it should take about 0�.

Thermometer(sensor) is the most important thing after the protection for sure.

I think it's fine as long as it's dry in there within reason.

My Waggie and a few other Trachys saw their lowest temps of the season in their enclosures at 11-13(F).
I have never seen any damage in the protection from these temps and usually won't see any until
we hit middle single digits,once again,that is within the protection.
Damage to Trachys from cold can start at 20(F) outside protection,usually following precip of some kind.

They should be fine. It probably was at least a degree warmer in the protection because of the warmth from the ground and warming that the sun would have caused, but even if temperatures did get that cold, they should be fine as long as they are dry. So far one of my trachys has seen 19F in its protection (no lights or frost cloth on that one) and it looked pretty bad when it was cold outside, but is now as green as it was this past summer with the milder temps. Trachys seem to have no problems down to 15F when dry, and definitely lower if dry and older.