"HA HA Budys Here" wrote in message
...
New window A/C units rarely even have the "outside air" option. They're
incredibly well insulated against allowing air leakage, and with a proper
window fit and install it shouldn't affect your allergies in the least.

My company made the fan scroll parts for one of the major airconditioner
manufacturers. We had to do a tooling change to add a fresh air vent. It
was a slot about 3/8" x 1". I asked the AC engineer why they even bothered.
He stated that Brand X had it so they had to have it to get the check mark
on the model comparison sheet some stores used. The amount of fresh air
that might come in was negligable.
Ed

http://pages.cthome.net/edhome