Heat recovery systems/ Positive pressure

[dinitro]

Hi

At the moment I have a positive pressure system in the house.  Basically this takes in air
from outside and blows it into the house 24/7
Soon the CH will be connected and the fan will hopefully blow through a few (10x 10mm) of turnings of copper.

I've just taken apart and old combi with heat exchanger (finned)...would it be worth plumbing this in instead of the
copper coils?

Also why don't we see more of 12v fans positioned near the ceiling blowing air via a tube down to floor level.
Since most of the heat is wated due to accumulation at ceiling level, wouldn't this be an idea?

[Ivan]

I don't know very much about the heat recovery systems yet, but certainly I know a consultant that used to recommend fans on long pipes to factories trying to reduce their heating bill - they simply pumped the warm air from ceiling level back down to ground level

[dinitro]

I've considered using 12 inch computer fan some of them are less than a pound each and connecting them to a piece of pipe down
to floor level.

Unfortunately in a domestic environment it is not the most beautiful thing...anyone have any ideas how to clothe this?

Ceiling fans also attempt this when the act in reverse and take air from ceiling height and push it downwards...

[bcaldwell]

Hi Dinitro,

Beware the fans that cost £1  . One of my other hobbies is Media centre computing (i.e. PC's that act like video recorders on steroids and go under the TV)

The noise that cheap fans produce in a sitting room will drive you and yours nuts after a very short space of time!

Its well worth looking at the noise levels of these before installing anthing, particularly if you build the fan into something and can't get to i again

Good luck.

Barry.

[Antman]

Hi Dinitro

I would add to Barry's advice that a bit extra spent on the ball-raced version of the fans is money well spent. The cheap ones are simple bronze bearings and they don't last. The slightest bearing wear and they start vibrating.

Antman

[Ivan]

Anyone tried one of these fans as a pico-sized wind turbine yet?