Im nervous because our landlords are coming to use a Compactor in the basement to compress dirt, yes dirt... our house is over 100 years old (live in new england)...but they will be pouring cement soon, but first need to use this gas powered machine, and we arnt allowed to be in the house while this machine is running because of carbon monoxide leaking, and im very worried about my orchids, i dont have any safe place to put them...i could check in the back yard but we get a lot of sunlight...i am worried this gas is going to hurt my plants that are all growing roots/leaves...and my new regular sized cattleya has a flower inside a sheath going to open any time.....what would you do? ill be gone from the house for awhile!