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<blockquote data-quote="muzzyhunter" data-source="post: 185663" data-attributes="member: 1093">hvac opinion neededIn bed #4 I would run a passive jumper one high one low,as mentioned by obi earlier,same would work for #5 if door to caz(furnace room) left open,if not diffuser mounted on ceiling and dropped into furnace room should work.Rooms look to be large enough were room to room pressures shouldnt be great,we strive for less than 3pa difference between room and main body of house.Even with return the bathroom will have signifantly high pressure(smaller volume).If you have an atmospherically vented furnace you could open door to caz while running the air handler and if it is pulled in,alleviate pressure to caz.With the air handler runninng and dryer going could make caz go negative and possibly backdraft atmo vented appliances typically waterheaters.I spend alot of time trying to backdraft appliances with worst case draft testing,for work.</blockquote>

[QUOTE="muzzyhunter, post: 185663, member: 1093"] [b]hvac opinion needed[/b] In bed #4 I would run a passive jumper one high one low,as mentioned by obi earlier,same would work for #5 if door to caz(furnace room) left open,if not diffuser mounted on ceiling and dropped into furnace room should work.Rooms look to be large enough were room to room pressures shouldnt be great,we strive for less than 3pa difference between room and main body of house.Even with return the bathroom will have signifantly high pressure(smaller volume).If you have an atmospherically vented furnace you could open door to caz while running the air handler and if it is pulled in,alleviate pressure to caz.With the air handler runninng and dryer going could make caz go negative and possibly backdraft atmo vented appliances typically waterheaters. I spend alot of time trying to backdraft appliances with worst case draft testing,for work. [/QUOTE]

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