My hvac installer claims it is sometimes better to place the vents for the bath ventilation systems in the attic because strong winds will force outside air into the ducting and house. He claims the flappers on the units is not enough to keep all the air out. I just wondered if this is true or is he wanting out of the extra work. He said he'd do it however we wanted. We have 5 bath vents and a range hood vent which he said he would vent the range hood on the roof for sure. most of the runs are fairly long so I doubt if much air is going to be forced inside.
Also he said he would normally just install a dryer type vent on the side of the house. I'm a little concerned about having 5 ugly aluminum dryer vents sticking on the house. I asked him if he had an upgraded type of vent but he doesn't
My attic is vented w/ continuous soffit and ridge vent but in most areas there are baffles installed so the ventilation is not really great like it would be for a fully vented attic space.
thanks. Any ideas are appreciated.