Big Dave, he has got all the right safety gear on. Do you know how to fit one of these? Yeah, Ah thank you.
The vent is fairly simple to install but if in doubt use a qualified trades person.
Once the opening is cut,
Dave fixes the vent into place using self drilling screws. The vent will operate in hot weather, when the air heats up sufficiently it opens and vents the hot air from inside the house, out into the atmosphere.