Key facts
- Brand
- Aprilaire
- Model
- Models 400
- Documents
- 2
- Languages
- EN
- Last added
- 2012-07-09
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Aprilaire Models 400/500/600/700 Humidifier Owner's Manual
The document serves as an owner's manual for Aprilaire Models 400, 500, 600, and 700. It explains the evaporative principle of operation where water flows over a Water Panel evaporator to add moisture to air circulated by a furnace blower.
Read onlineAll Aprilaire Models 400 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How do I check my home's current relative humidity?
Set the thermostat to activate the blower, turn the humidifier dial off and on slowly until you hear clicks, then note the setting against Table 2.
From: Aprilaire Models 400/500/600/700 Humidifier Owner's Manual
What should I do if condensation forms on windows?
Reduce the setting on the control dial by one increment.
From: Aprilaire Models 400/500/600/700 Humidifier Owner's Manual
How often should the Water Panel evaporator be changed?
It should be changed once a year, except for Model 400 which requires changing it twice a heating season.
What causes condensation on windows?
Condensation indicates that the humidifier setting is too high and needs to be reduced.