Fresh Air Ventilation - Trane EDHUM070H Installation & Operation Instructions

Fresh air ventilation is optional.
Fresh air may be brought into the structure by connecting an insulated duct from outside the structure to
a tee located in the inlet duct of the EDHUM070H. A ventilation control is needed to program the time and
frequency that the unit introduces outside air. The time and frequency of ventilation should be based on the
size and occupancy of the residence.
• The 6" fresh air ventilation duct should tee into the 8" round collar on the front of the EDHUM070H.
• An insulated 6" diameter duct can provide up to 55 CFM of outside air.
• Performance of the EDHUM070H can be impacted by inside and outside air conditions.
• When a 6" motorized damper is used, a digital control is required.
• It may be necessary to use 8" duct work if additional fresh air is required.
• In cold climates or at times when the dew point is low, ventilation can be used to dehumidify the
structure, making the EDHUM070H capable of year-round drying.
Fresh Air Ventilation With Dehumidifier Off and Fan Only Operation
Outside air mixes with return air prior to beginning the dehumidification process. Outside
and inside temperature and relative humidity will impact the combined outlet air conditions.
Outdoor Air
90°F, 65%RH
A
Motorized Damper
B
Indoor Air
70°F, 50%RH
Outdoor Air
30°F, 65%RH
A
Motorized Damper
B
Indoor Air
70°F, 50%RH

FRESH AIR VENTILATION

Hot Climate
6" Fresh Air Inlet
A
(Optional)
8" Return Air Inlet
B B
8" Supply Air Outlet
C
Mixed Air Mixed Air Mixed Air
75°F 75°F 75°F
65%RH 65%RH 65%RH
Cold Climate
6" Fresh Air Inlet
A
(Optional)
8" Return Air Inlet
B B
8" Supply Air Outlet
C
Mixed Air Mixed Air Mixed Air
59°F 59°F 59°F
51%RH 51%RH 51%RH
C
Outlet Air
75°F, 65%RH
C
Outlet Air
59°F, 51%RH
11
18-HE133D1-1A-EN