Haier AB072MRERA Service Manual page 566

ERV0500ANN ERV0800ANN ERV1000ANN
Aluminum foil
Install the two outdoor ducts at a certain gradient (no less than 1/30) to avoid the water flowing backward.
Meanwhile the three ducts (two outdoor ducts, one indoor duct) all need the heat insulation material against the dew.
Installation distance between air discharging hole and air inlet hole should be 3 times longer than duct.
Maintenance space:
Gradient more than 1/30
Maintenance
space
558