I'm going to make an assumption that either roost is long enough to accommodate all 5. If so, I wouldn't worry about it. I have one chicken that just seems to prefer to roost alone until it gets to cold for her.
I was once told that, "Advice is like wine. It affects you only if you take it."
Personally, I could care less if you heat, cool, humidify, dehumidify, install a hepa filter, or give your flock all mink coats. I just don't care what you do. Why should I? They're your responsibility, not mine...
Good to know. As soon as it gets to -60 here in Central Texas I'll keep that in mind.
Of course, since during the last ice age temps around here only got down to about 0 I think I'll have more to worry about than the comfort of my flock, things like surviving.
Hokum, by hydro I'm going to assume that you mean hydro-electric.
That reminded be of a huge ice storm that hit the Midwestern US in about 1967. No electricity, no phones, roads impassible, water froze in the pipes. I knew some folks that kept a commercial dairy herd of about 200 head. As we...
If we're going to discuss the "comfort zone" for chickens there are other factors to be considered. Light, and humidity are also factors relating to a chickens comfort.
According to the American Egg Board the ideal temperature is 57 and 79°F. Logic would dictate that if there is a "too cold"...