Whats a good temp controller for a fan?

I'm looking for something to power my 240CFM 110v fan on and off given a temperature window. So say I want my mom box to vent once it hits 78 and to stop venting once it reaches 75.

Thanks everyone. Trying desperately to get my room conditions perfect.

if you carnt find anything and you have the money maybe something like this will help
http://www.sofort-marketing.de/pktrade/index.php?page=shop.product_details&category_id=23&flypage=shop.flypage&product_id=136&option=com_virtuemart&Itemid=26

If I could use it on 110v it would be, thanks for that though. I'll see if I can find an american equivalent.

Anyone have any experience with the C.A.P. TMP-DNe Day/Night Temperature Control?

I use inline thermostats for all my grow areas. They can be changed from heating to cooling by opening them and flipping 1 wire. They are 100% water tight, I have been using these same units for 5 years almost. They are faded in color from being under HIDS Here are a few shots of 2 of my units. They are 2 degree units, I set it at 24C, once it gets to 26C my fan kicks on, kicks off at about 23.4C ish. I know they are 100% water tight as I had a small flood issue and one of my units used for heating is mounted close to the ground, it was totaly under water for 5+ hours, works like brand new.

These units have 1 cord that comes out of it, that cord has a male and female adapter at the plug, you plug your fan into the thermostat adapter at the power bar and you are set.

Look for: Lux WIN100 Heating & Cooling Programmable Outlet Thermostat