emailed Bitmain tech support and gotten the following response:

 Bitmain (Bitmain_D)

Jul 3, 14:22

Hello sir,
first of all your room temperature is a really high.

can you lower it to 25C?

since any unit that you have will die on 32c.
no matter how ventilated area is.

i would not suggest you units to go over 65C.

and if it is possible, just to extend their lives, can you turn them off for 2 hours during hottest time of day?
they will last longer.

we do not see a reason for replacing working units.


best regards,
Bitmain_Z