Hiya peeps, I've got a question for anyone electricaly minded, here goes,with alot of help from O.T. and Raz I recently built a thermo fan controller, you can see it Here
the thing is I now have an inlet fan of the same size and want to know if I can wire them both up to the same controller through the thermostat so having two fans into the same setup?
will this work o.k.? or do I need to make another fan controller the same for the inlet fan?

many cheers in advance for any replies
prawn

Hiya Prawn,
if you fan controller is rated to take the power from the two fans that should be ok.But they must be wired in parallel,not series.

Cheers Doc rock
when you say parallel do you mean the wires from both fans are twisted together (blue from one fan twisted with blue from the other then put back as they were and same for brown ) ?
sorry, just read this post, not explained very well hope you know what I mean, I'll get some photos up soonish, today's a write off though had a very debauched day and night

When fans or any electrical equipment is wired in series this means that each load is wired one after the other from the source. ie - phase (red/brown) conductor from source to L terminal on appliance - another phase (red/brown) conductor from L terminal on first appliance to L terminal on second appliance etc. Same goes for neutrals and cpc's
Parallel wiring is done by using common Phase, Neutral and cpc's and connecting your appliances via a junction off these 'common' conductors. The benefits of this are that if one appliance fails to operate (as long as the 'common' fuse or breaker hasn't operated) the other will not be affected.
To wire your fans first make sure the controller can handle the combined loads (power in watts) of BOTH at MAXIMUM demand and wire these using the parallel method, fuse each of the appliances locally and use conductors with the appropriate cross sectional area for the current demand.
EXAMPLE - If you've got 2 appliances with a max load of 100w each, your current should be around 0.8A in your common phase and neutrals (not exact due to no power factor consideration) and 0.4 in each of the local phases/neutrals a 1mm csa solid pvc/pvc will handle this no probs and 3A fuses are adequate (this also allows for a higher current on startup). If still unsure GET AN ELECTRICIAN.

Hi Prawn,
a debauched day and night?Sounds trez decadent!

Anyway,yes I do mean that you connect up the live from both fans together and the same for your neutral.
But as always,if in doubt get a spark.

Lunched out a bit on the d.i.y. front... but wired it up last night works a treat.... the intake isn't pulling as much air as the outtake but that's cool as it'll vacuum pack the room....cheers all