No sprayers. Don't use any in the greenhouses either (because of the fans/heaters). You ought to go to the Florian website and look at the statistics on this glass. You won't believe how efficient it is, both in winter and in summer. But don't just trust their numbers. Ask
@Ursula. She has had a Florian greenhouse for many years. If it were not for Ursula's experiences and her willingness to share those, I would not have spent twice the money for Florian glass.
I guess your friend will have to put on some type of shading, perhaps Aluminet. With deep enough pockets, it can put in a remote controlled system to control the shade cloth.