saw my first exhausto system

[coolerinfrederick]

of course the facilty did not have any service manuels, i'm
hoping someone can steer me into the right direction too gather material on
the besb box ventalaters and there automated contol system, i have 5 90% furn. and 2 comm. hwh., tied into a common vent with the exhausto system, any info. would help, i will be returning in a couple of days sorry all i got at this time,i was on the exhausto wbsite but u need a password,

thanks

[slimwoodie]

twin fan's ..??

Ha ... you don't know the first one broke, 'till the second one quit's ...:mad:

EuroTrash

have fun climbin' that Chimbley ...:p