1000w leds get hot if thats what it is. What brand is it? A 1000w led will cost minimum Â£1500 so if you havent paid that or more its def notba 1000w using cree and osram. But thats not the point sorry.
Go with a 6in rvk mate, they cheap and reliable and it will change air 6 or 7 times per min in a tent that size which means loads co2 for your plants and use a 6inch rhino carbon filter a 600mm one. Im guessing you in uk right? So these things easy to get there. Dont go spending Â£Â£Â£ on top brand fans for a tent that size as its not necessary. About 60quid should do it. The filter will be expensive but thats necessary for odour control and it will last you a couple years in a tent that size.
I have 2 x 900W HydroMars II LEDs in a 4x4 tent (which I know is a lot). It doesn't produce much in the way of heat. Each light has 4 fans. The constant air circulation doesn't allow for much of a build up.