Aprilaire Humidifiers
SUFFIX 'A': Automatic digital control (shown)
SUFFIX 'M': Manual control
Where automatic control is not practical, the digital control can be installed in a manual mode.
Aprilaire Humidifier Models
400A/400M LARGE BYPASS UNIT: Uses 100% of water and evaporative technology, eliminating the need for a drain.
500A/500M SMALL BYPASS UNIT: Economy model. Designed for smaller homes.
600A/600M LARGE BYPASS UNIT: Uses the furnace blower to move air through a Water Panel®.
700A/700M POWERED UNIT: Built-in fan pulls heated air directly from the furnace.
Specifications
| APRILAIRE# | SH# | TYPE | SQ. FT. AREA (AIR CHANGES/HR.) | UNIT SIZE (W x H x D - Inches) | PLENUM OPENING (W x H - Inches) | WATER EVAP. RATE | WATER FEED RATE | ELECTRICAL |
|---|---|---|---|---|---|---|---|---|
| 400A, 400M | 400A, 400M | Bypass humidifier | 1,000 loose (2) 2,000 average (1) 4,000 tight (1/2) |
15-3/8 x 15-3/4 x 10-1/4 6" dia. round opening |
10 x 12-3/4 | 0.70 GPH | 3 GPH | 24v, 60 Hz, 0.5 amp |
| 500A, 500M | 500A, 500M | 750 loose (2) 1,500 average (1) 3,000 tight (1/2) |
15-5/8 x 13 x 10-1/4 6" dia. round opening |
9-1/2 x 9-1/2 | 0.50 GPH | |||
| 600A, 600M | 600A, 600M | Bypass humidifier | 1,000 loose (2) 2,000 average (1) 4,000 tight (1/2) |
15-3/8 x 15-3/4 x 10-1/4 6" dia. round opening |
10 x 12-3/4 | 0.70 GPH | 6 GPH | 120V, 60 Hz, 0.8 amp |
| 700A, 700M | 700A, 700M | Power humidifier | 1,050 loose (2) 2,100 average (1) 4,200 tight (1/2) |
15-29/32 x 18 x10-11/32 | 14-3/4 x 14-5/16 | 0.75 GPH |
Warranty
All Aprilaire models are warranted for 5 years from date of installation for parts.
Components Included
- Saddle valves
- Transformers
U.L. Information
All Aprilaire models are UL listed and meet the requirements of UL Standard 998 except 400A. All components in the 404A meet requirements of UL Standard 998 with the exception of the paper Water Panel.
Performance Based On
- 20°F and 70% R.H. outside air.
- 70°F and 35% R.H. room air.
- Internal moisture gain of 1 lb/hr.
- 70% blower operation.
- 8 ft. ceiling height.
Humidifier Parts
| SH# | APRILAIRE# | DESCRIPTION | USED IN APRILAIRE HUMIDIFIER MODEL |
|---|---|---|---|
| 4335AA | 4335 | Feed tube with compression sleeve | 400A, 500A, 500M, 600A, 600M |
| 4655AA | 4655 | Manual humidifier control | 500M, 600M, 700M |
| 4336AA | 4336 | Sticker and manual mode resistor | Older beige colored automatic humidifiers |
| 4232AA | 4232 | Orifice, blue | 700A, 700M |
| 4231AA | 4231 | Orifice, yellow | 400A, 500A, 500M, 600A, 600M, 700A, 700M |
| 4236AA | 4236 | Scale control insert | 600A, 600M |
| 4330AA | 4330 | Scale control insert | 600A, 600M |
| 4640AA | 4640 | Scale control insert | 500A, 500M |
| 4403AA | 4403 | Scale control insert with float chamber | 400A |
| 4010AA | 40101 | Transformer | 400A, 500A, 500M, 600A, 600M, 700A, 700M |
| 4246 | 4246 | Water distribution tray | 700A, 700M |
| 4331AA | 4431 | Water distribution tray | 500A, 500M, 600A, 600M |
| 45AA | 45 | Water panel evaporator | 400A |
| 10AA | 10 | Water panel evaporator | 500A, 500M |
| 35AA | 35 | Water panel evaporator | 600A, 600M |
| 4040AA | 4040AA | Water solenoid valve, 24 volt | 400A, 500A, 500M, 600A, 600M, 700A, 700M |
