Ventilation Details
Sought
To the Editor:
In Mr. Rosenbaum's excellent
article, "Simple Ventilation for
Tight Houses" (5/91), he did not
touch upon two items of some
importance:
• details for connections to drain
condensation in ductwork where
the air is flowing down towards
the fan;
• accessibility for cleaning duct
and practicality of cleaning
flexible duct.
I would be interested in Mr.
Rosenbaum's experience with these
matters.
Kenneth Kruger, P.E.
Cambridge, Mass.
Marc Rosenbaum Responds:
In my house, I have a length of
clear, uninsulated flexduct on the
exhaust side just ahead of the heatrecovery
ventilator (HRV) because I
was concerned about both issues raised
by Mr. Kruger. I can check it easily
for dust or condensation. There is a
bit of wood dust inside the duct which
appeared