has a particular roof ventilation product(s) and advertises
it as being suitable for a whole gamut of things. The consumer,
without thinking, thinks ‘this must be what I need’ ………Big
might be saying that their roof ventilator is suitable for all
and in sundry but it’s not saying it it ideal to your purpose
falls on you.....
history in building as regards to ventilation, particularly
roof ventilation, has always said that that the roof ventilator
size on the roof must be proportional to the air ingress via
the eaves vents.
happens, you buy the roof ventilator and then some eaves vents,
proportional value goes out the window because you don't quite
understand the relationship of one to the other
approach was Ingress around the periphery via eaves vents, and
exit from one centrally located escape point being the roof
ventilator on the roof.
does it say that you need to place (roof ventilators) all over
the roof for greater efficiency in roof ventilation
was purely a marketing gimmick foisted on the masses who were
ripe for the taking
that most roof ventilators available in hardware stores are
too small for most residential applications is immaterial as
the responsibility of the purchase lays with the consumer, and
as with the blind leading the blind, the consumer ended up with
several on his roof instead of one larger, but then if one larger
vent were to be used his house would end up looking like a factory.
is that one large roof ventilator works far more efficiently
than several smaller and it need not be wind driven as Cupolas
have proven over the centuries
roof ventilator is used as an inducement, or freebie if you
will, to entice a prospective client into using the roofing