I've got a 21m2 high tunnel (3x7m) I want to grow tomatoes in. This tunnel has a ventilation problem, it gets way too hot in the middle of summer.
I've also got ducks that will need their 0.8 m3 pond cleaning out weekly in the summer.
I've been thinking of putting in two drain pipes like these buried underneath the two paths running lengthwise :
The ends of these I'd have poking out. This is where I could drain the duck water into. Also, I could make a tube with a solar powered computer fan at one end, pushing hot air down the drainpipes for cooling in the soil.
Would that work?