Welcome to Matthew's Volvo Site.
The evaporator is behind the dash, not in the engine compartment. There is a drain hose beneath the evaporator which drains off excess moisture from the outside of the evaporator and allows it to drop under the car. Possibly this was what he meant.
Work was good - retirement is better.
1996 850GLT 2.5 20v Estate Manual.
1995 Peugeot Boxer 2.5Tdi Autosleeper.
1984 244DL, Manual, Beige.
1987 744GLE, Manual, Green.
1991 960 3.0 24v, Auto, Silver.
1994 940T Wentworth, Auto, Blue.