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HI-E DRY 100
Installation, Operation and Maintenance Instructions
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2.3 Condensate Removal
The HI-E Dry 100 is equipped with a condensate pump to remove the water that is condensed during
dehumidification. This allows the condensate to be disposed of at a distant location, or to be pumped to a
level above the HI-E Dry 100. The condensate pump is mounted inside the HI-E Dry 100 as an integral part
of the unit. If the condensate must be pumped more than 18 feet above the unit, a second pump must be
added to relay the condensate.
2.4 Ducting
2.4A Optional Ducting
An inlet shroud with a 8” round collar and an 8” round exhaust collar are available from the factory that will
allow round ducting to be attached to the inlet and/or outlet of the HI-E Dry 100.
2.4B Ducting for Dehumidification
Ducting the HI-E Dry 100 as mentioned in sections 2.1B-2.1E requires consideration of the following points.
Duct Sizing: For total duct lengths up to 25’, use a minimum 8” diameter round or equivalent rectangular.
For longer lengths, use a minimum 10” diameter or equivalent. Grills or diffusers on the duct ends must not
excessively restrict air flow.
Isolated Areas: Effective dehumidification may require that ducting be branched to isolated, stagnant areas.
Use 6” diameter branch ducting to each of two or three areas; use 4” to each of four or more areas.
2.4C Ducting for Fresh Air
Fresh air can be brought into the structure continuously by connecting a duct from outside to the HI-E Dry
100 inlet and by turning on the fan switch. Advantages of this form of ventilation include:
1. Outside air is filtered before entering the building.
2. Outside air will be dehumidified before entering if the HI-E Dry 100 is running.
3. Drawing air from outside and blowing inside aids in pressurizing the structure. This helps prevent
unfiltered and undehumidified air from entering elsewhere. It also reduces the potential for carcinogenic
radon gas to enter.
4. The need for an alternate ventilation device may be eliminated.
3. Operation
3.1 Humidity Control Adjustment
The humidity control device will run continuously until the relative humidity (RH) is reduced to the
humidity control dial setting. Setting the humidity control to lower RH levels will NOT increase the unit’s
dehumidification rate, it will simply run longer to reduce the area’s RH to the setting. The HI-E Dry 100 unit
(and refrigerant based humidity control devices in general) will reduce a warm space’s RH to a lower level
than that of a cool space. It is therefore pointless to set the humidity control to excessively low levels in cool
rooms. Doing so will result in long periods of ineffective humidity control device run time.
A quality humidity meter is recommended to accurately monitor humidity levels. For a quote on a quality
humidity meter, call the factory.
