> I have a friend that raises bees for honey.
> To get the honey out of the combs, she just puts an extra log on her
> woodstove and lets the honey drip out.

If her living was dependant on selling honey she will do what commercial
beekeeper do.Using heat for efficiency unless purposefully decide to not do
it for quality.

.
> What if we have an especialy hot summer? Wouldn't that kill the enzymes in
> the honey too then?

Bees maintain the hive temperature constant and cool down the hive by
fanning with their wings .
For some reasons they want the honey to not get too  hot or too cold .

jean-claude