Adrian,
If you install a heater duct the air from a cold location and not from the engine bay like my car.
I have to block off the air in summer or my feet cook.
But what could you expect from a car built in England where it's cold most of the time.
Cheers,
Bryan
__________________
COB-66 Young at heart old fart.
Don't drive faster than your guardian angel can fly.
If it doesn't matter what gear your in you have enough torque.
VK3KDN