The recommended low for Phalaenopsis is about 55F. Anything below that and they stop growing, as for the "oncidiums" depends on which ones you have....as for the bubble wrap. Probably not a good idea because orchid need air movement.

Seek help from the locals for the general move them inside date.

It's been below 55F for few days now and I just checked them and they look great.
When you say "anything below 55 and they stop growing" does that mean they're still alive, just not actively growing? Will they die if left out all winter?
They never looked this good indoors ever. They finally look like they are alive and thriving.
I don't have any locals to seek help from so I'm asking here.
I was thinking that by the end of november I should insulate them in some way...but not bring them back in the house with the dry heat.
They really don't do well in my house.

Regardless of how well they're doing now,they will likely die if you leave them out all winter. May be you could do an experiment...leave them out and let us know how they do. Otherwise, since they survived the past two winters in your house, you might try to find a cool place (away from dry heat) and set up a small stand with florescent lights. Put them outside in the Spring. Keep them above 50-55 degrees f.

They will not survive and could be dead already. Orchids are very slow to react but will decline or die. Those temps are way too low for those orchids, especially Phals. Phal leaves will freeze, wilt and turn into a soggy mess.

If they haven't frozen yet, bring them in and don't worry about the dry heat. I've been growing mine for over 20 yrs in NY with dry heat and they do fine.

Put them out when the temps warm up in the Spring and bring them in as soon as night temps dip below 50.

Jane

thanks for all the advice. I'll bring them in...