Hybrid Car – More Fun with Less Gas

Simple cooling system - Page 3

register ::  Login Password  :: Lost Password?
Posted by N. Thornton on August 29, 2004, 9:34 pm
for ronnie the christian capon who is afraid of todays date

It would also look like crap and be noisy for whoevers in that room,
so they wouldnt use it.

Attic heat is part of the problem, our attics are unvented here.

Posted by N. Thornton on August 29, 2004, 10:36 am

this really confirms my brief thought to use a ceiling fan and make a
thin flexible plywood cowl for it. Mount the fan on the roof rather
than ceiling, with an extended drop rod. This would deal with the
noise issue, provide sufficient air shift, come with 3 speed settings,
and be cheap too.

I bet! I had a 1.4kW one once, wish I still had it. Sadly I dont. It
could turn an oven into a cold wind tunnel in seconds. A bit too much

of course - so simple but I didnt think of it. Thank you. Much of the
air flow will have to negotiate closed doors, but several in parallel
should provide at least some airflow I hope. I'm not real convinced

I think that would probably be too noisy. Also be more expensive on
wiring (with channelling), and look ugly. In terms of cooling function
it would be almost ideal, but.

of course. There is no attic venting at present. My bigger concern
though is the doors. There is only a very small area of gap under
each, and ceilng fans are high volume low pressure. This strikes me as
the one last problem. I _dont_ want horrible metal grills in the
doors. Will think some more... perhaps slice a little off the doors.

Regards, NT

Posted by Anthony Matonak on August 29, 2004, 1:31 pm
 N. Thornton wrote:

I think you'll find the blades on a ceiling fan aren't shaped to
be very efficient. Most whole house fans, even the window versions,
have a much more advanced shape. You might do better to buy two or
three cheap box fans. Place a curved duct inside the box and they
can pull a lot of air. They usually have three speeds and on "low"
they're pretty quiet. Two or three set on low will be able to pull
a lot of air through your building and you could turn them on/off
individually to act as a kind of multi-speed control.


Posted by N. Thornton on August 29, 2004, 9:22 pm
Cheap box fans are thoroughly noisy though. This will be operating
above bedroom ceilings. They are also a fire risk, and will be
operating out of sight or smell. Decent box fans I've been seeing at
90-150 GBP each in trade catalogs, x1.5 to get USD.

ya lost me there

This would work fine with the decent ones, but be about 15 times the
cost of a ceilng fan, 300 rather than 20. If I need to do that, OK,
but do I?

Regards, NT

Posted by nicksanspam on August 29, 2004, 12:23 pm

I'm surprised they are so expensive in the UK. Grainger's has a 120 V motor.
You might look for window box fans in some large UK home building supply
store or industrial hardware store, or convert your house to 120 V :-)

Put the fan in a window on one side of the house, and open a few house
windows a bit on the other side. Use a cigarette or your velocity stick
and open or close the windows a bit to ensure uniform air velocity or
air temperature in every part of the house with the fan running, eg
through the connecting doors of all rooms?


This Thread
Bookmark this thread:
  • Subject
  • Author
  • Date
please rate this thread