Cooling down without Air Conditioners

[Guest]

Yes its an irritant and hazerous in large quanities. but in roof top units like most buildings use it is not hazerdous. They only people who it can bother in such a case is repair men, but there are safety measure which negate this issue easly for professional hvac service.

And ammonia is not less effiecent than freon.

It is still used in the largest capacity freezers such as icecream warehouses.

[Occhidiangela]

Doesn't that depend on the size and design of the unit? I am not going to argue about the "industrial strength" coolers you refer to: if ammonia were not a more cost effective option in those monsters, I doubt it would be used. :)

However, for the car sized units, window units, and even small household units, isn't the weight, plumbing and mass flow problem a different problem to solve? Not everything scales up and down seamlessly.

You seem to know a bit about the AC business.