| Brand Name & Model Number | Adams FH10 FH16 FH20 | Adams FH300A FH300B | Adams FH400A FH400B FH400C | Adams FH-1000-L10 FH1000-L20 FH1000-L24 | Aprilaire 110 112 (NoTE B) |
| Type | Under Duct or Reservoir | Under Duct or Reservoir | Under Duct or Reservoir | Under Duct or Reservoir | Power Fixed Pad |
| Capacity (GPD) | 10.0 16.0 20.0 | 13.0 24.0 | 13.0 24.0 32.0 | 10.0 20.0 24.0 | 14.4 24.0 |
| Voltage (VAC) | 120 OR 24 | 120 | 120 | 120 OR 24 | 120 |
| Agency Listed | N/A | N/A | N/A | N/A | N/A |
| Mounting Location | Duct or Plenum | Duct or Plenum | Duct or Plenum | Duct or Plenum | Hot air |
| Overflow Protection | No | No | Yes | No | Must Drain |
| Drain Type | No | No | No | No | Yes |
| Humidistat | No | No | No | No | Yes |
| All Install Materials | Yes | Yes | Yes | Yes | No |
| Ease of Service | Removing Front Cover | Window remove from duct | Window remove from duct | Remove from duct | Disassembly from case awkward |
| Construction | Plastic – Kit for Plenum Mounting | Stainless Steel Kit for Plenum Mounting | Plastic – Kit for Plenum Mounting | Plastic – Kit for Plenum Mounting | Plastic – Do not supply water or drain tubing |
| Brand Name & Model Number | Aprilaire 220 224 | Aprilaire 400 | Aprilaire 440 (Note B) | Aprilaire 445 | Aprilaire 550 |
| Type | By-pass Fixed Pad | By-pass Fixed Pad | By-pass Fixed Pad | By-pass Fixed Pad | By-pass Fixed Pad |
| Capacity (GPD) | 9.6 16.8 | EST. 13.0 | 16.8 | 16.8 | 12.0 |
| Voltage (VAC) | 24 | 24 | 24 | 120 | 24 |
| Agency Listed | N/A | N/A | N/A | N/A | N/A |
| Mounting Location | Hot or Cold Air | Hot or Cold Air | Hot or Cold Air | Hot or Cold Air | Hot or Cold Air |
| Overflow Protection | Must drain | No drain required | Must drain | Pump | Must drain |
| Drain Type | Yes | No | Yes | No | Yes |
| Humidistat | Yes | Yes | Yes | Yes | Yes |
| All Install Materials | No | No | No | Yes | No |
| Ease of Service | Disassembly of case | Removing front cover | Removing front cover | Removing front cover | Removing front cover |
| Construction | Plastic – Do not supply low voltage wire, water or drain tubing, boot & mounting collar | Plastic – Do not supply low voltage wire, water or drain tubing, boot & mounting collar | Plastic – Do not supply low voltage wire, water or drain tubing, boot & mounting collar | Plastic | Plastic – Do not supply low voltage wire, water or drain tubing, boot & mounting collar |
| Brand Name & Model Number | Aprilaire 560 | Aprilaire 600 | Aprilaire 700 | Aprilaire 760 | Autoflo 40&40W 40S&40SW |
| Type | By-pass Fixed Pad | By-pass Fixed Pad | Power fixed pad | Power fixed pad | Power fixed pad |
| Capacity (GPD) | 16.8 | 16.8 | 18.0 | 18.0 | 13.2 10.6 |
| Voltage (VAC) | 24 | 24 | 120 | 120 | 120 |
| Agency Listed | N/A | N/A | None | N/A | N/A |
| Mounting Location | Hot or Cold Air | Hot or Cold Air | Hot air | Hot air | Hot or Cold Air |
| Overflow Protection | Must drain | Must drain | Must drain | Must drain | Pump must drain |
| Drain Type | Yes | Yes | Yes | Yes | Yes No |
| Humidistat | Yes | Yes | Yes | Yes | No |
| All Install Materials | No | No | No | No | Yes |
| Ease of Service | Removing front cover | Removing front cover | Removing front cover | Removing front cover | Opening front cover |
| Construction | Plastic – Do not supply low voltage wire, water or drain tubing, boot & mounting collar | Plastic – Do not supply low voltage wire, water or drain tubing, boot & mounting collar | Plastic – Do not supply low voltage wire, water or drain tubing, boot & mounting collar | Plastic – Do not supply low voltage wire, water or drain tubing, boot & mounting collar | Stainless Steel and Plastic |
| Brand Name & Model Number | Autoflo 97 | Autoflo 200P | Autoflo 244D | Autoflo 250 | Autoflo 300A 300B |
| Type | By-pass Reservoir | By-pass Reservoir | Under Duct | By-pass Fixed Pad | Atomizing Spray Nozzle |
| Capacity (GPD) | 19.3 | 14.0 | 21.0 | 15.0 | 12.0 |
| Voltage (VAC) | 24 | 24 | 120 | 24 | 24 120 |
| Agency Listed | N/A | N/A | N/A | N/A | N/A |
| Mounting Location | Hot or Cold Air | Hot or Cold Air | Duct | Hot or Cold Air | Hot air |
| Overflow Protection | Yes | Yes | Yes | Must drain | Yes |
| Drain Type | No | No | No | Yes | No |
| Humidistat | No | No | No | No | No |
| All Install Materials | Yes | Yes | Yes | No | Yes |
| Ease of Service | Window Removing front cover | Removing front cover | Remove from Duct/Clips | Removing front cover | Remove from furnace |
| Construction | Stainless Steel and Plastic | Stainless Steel and Plastic | Plastic | Stainless Steel and Plastic – Do not supply low voltage wire & drain tubing | Plastic |
| Brand Name & Model Number | Autoflo 400BP | Autoflo 550-1 | Autoflo SC-15 | Autoflo X-15A X-15B | General 40 |
| Type | By-pass Reservoir | Steam Type | Central Fixed Pad | Steam Type | Plate |
| Capacity (GPD) | 10.0 | 13.2 | 15.0 | 13.2 19.1 | Not rated |
| Voltage (VAC) | 24 | 120 | 24 | 120 220 | None |
| Agency Listed | N/A | ETL | N/A | UL | N/A |
| Mounting Location | Hot or Cold Air | Hot air | Hot air | Hot air | Hot air |
| Overflow Protection | Yes | Yes | Must drain | Yes | Yes |
| Drain Type | No | No | Yes | No | No |
| Humidistat | No | No | No | No | No |
| All Install Materials | Yes | Yes | Yes | Yes | Yes |
| Ease of Service | Window Removing front cover | Remove from furnace | Removing front cover | Remove from furnace | Disassembly remove from furnace |
| Construction | Plastic | Stainless Steel Auto-flush | Plastic | Stainless Steel | Plastic |
| Brand Name & Model Number | General 45 | General 65 | General 81 | General 709 | General 747 |
| Type | Power Reservoir | By-pass Reservoir | By-pass Reservoir | By-pass Fixed Pad | Under Duct |
| Capacity (GPD) | 7.0 | 13.3 | 18.0 | 17.0 | 16.0 |
| Voltage (VAC) | 24 | 24 | 24 | 120 OR 24 | 120 OR 24 |
| Agency Listed | N/A | N/A | N/A | N/A | N/A |
| Mounting Location | Hot air | Hot or Cold Air | Hot or Cold Air | Hot or Cold Air | Duct |
| Overflow Protection | Yes | Yes | Yes | Must drain | Yes |
| Drain Type | No | No | No | Yes | No |
| Humidistat | No | Yes | Yes | No | No |
| All Install Materials | Yes | Yes | Yes | No | Yes |
| Ease of Service | Disassembly remove from furnace | Window Removing front cover | Window Removing front cover | Removing front cover Disassembly of case | Remove from Duct |
| Construction | Plastic | Stainless Steel | Stainless Steel | Plastic – Also with recalculating pump. Do not supply water tubing & By-pass Hose | Plastic |
| Brand Name & Model Number | General 800 | General 1040 | General 1042 | General 1099 | General 1137 |
| Type | Plate | By-pass Fixed Pad | By-pass Fixed Pad | By-pass Fixed Pad | Power fixed pad |
| Capacity (GPD) | Not rated | 18.0 | 18.0 | 23.0 | 21.3 |
| Voltage (VAC) | None | 120 OR 24 | 120 OR 24 | 120 OR 24 | 120 |
| Agency Listed | N/A | N/A | N/A | N/A | N/A |
| Mounting Location | Hot air | Hot or Cold Air | Hot or Cold Air | Hot or Cold Air | Hot air |
| Overflow Protection | Unknown | Must drain | Must drain | Must drain | Must drain |
| Drain Type | No | Yes | Yes | Yes | Yes |
| Humidistat | No | Damper | Damper | Damper | Yes |
| All Install Materials | Yes | No | Yes | No | No |
| Ease of Service | Inspection Plate Remove from Furnace | Inspection Plate Disassembly of Case | Inspection Plate Disassembly of Case | Inspection Plate Disassembly of Case | Disassembly of case |
| Construction | Painted Steel | Plastic – Do not supply by-pass hose, water tubing & low voltage wire | Plastic | Plastic – Also with recalculating pump. Do not supply by-pass hose, water tubing & low voltage wire | Plastic – Also with recalculating pump. Do not supply by-pass hose, water tubing & low voltage wire |
| Brand Name & Model Number | Herrmidifier 50 | Herrmidifier 447 | Herrmidifier 450 | Herrmidifier 465 | Herrmidifier 470 |
| Type | Atomizing Spray Nozzle | By-pass Reservoir | By-pass Reservoir | By-pass Reservoir | By-pass Reservoir |
| Capacity (GPD) | 11.0 | 13.8 | 12.6 | 17.1 22.5 | 22.5 |
| Voltage (VAC) | 120 OR 24 | 120 OR 24 | Air Drive | 120 OR 24 | Air Drive |
| Agency Listed | N/A | N/A | N/A | N/A | N/A |
| Mounting Location | Hot air | Hot or Cold Air | Cold air | Hot or Cold Air | Cold air |
| Overflow Protection | Yes | Yes | Yes | Yes | Yes |
| Drain Type | No | No | No | No | No |
| Humidistat | Yes | Yes | No | Yes | No |
| All Install Materials | Yes | No | No | No | No |
| Ease of Service | Remove from furnace | Window Disassembly of case awkward | Window Disassembly of case awkward | Window Disassembly of case awkward | Window Disassembly of case awkward |
| Construction | Plastic – Stainless Steel Nozzle/Filter | Plastic – Do not supply transformer, wiring, water tubing & by-pass hose. | Plastic – Damper Do not supply water tubing | Plastic – Do not supply low Voltage Wire, transformer & water tubing | Plastic – Damper Do not supply water tubing |
| Brand Name & Model Number | Herrmidifier 486 | Herrmidifier 490 | Herrmidifier 707 SERIES | Herrmidifier 1400 | Herrmidifier 2000 |
| Type | Power Reservoir | Power fixed pad | Atomizing | Under Duct | Under Duct |
| Capacity (GPD) | 20.3 | 21.3 | 6.0 | 18.0 | 25.0 |
| Voltage (VAC) | 120 | 24 | 120 | 24 | 120 OR 24 |
| Agency Listed | N/A | N/A | N/A | N/A | N/A |
| Mounting Location | Hot air | Hot air | Cold air | Duct | Duct |
| Overflow Protection | Yes | Must drain | No | Yes | Yes |
| Drain Type | No | Yes | No | No | No |
| Humidistat | Yes | Yes | 707TW only | Yes | Yes |
| All Install Materials | No | No | Yes | No | No |
| Ease of Service | Removing panel | Service gauge disassembly of case | None Disassembly of case | Remove from Duct | Window Remove from Duct |
| Construction | Plastic – Do not supply water tubing | Plastic – Fiber media complex design. Do not supply water tubing | Plastic | Plastic – Do not supply low voltage wire | Plastic – Plug-in power water level indicator. Do not supply water tubing |
| Brand Name & Model Number | Herrmidifier 3500 | Herrmidifier 4000 | Herrmidifier 5000 | Lau VA3300 | Lau VA3800 |
| Type | Spray Fixed Pad | Spray Fixed Pad | Steam Type | By-pass Reservoir | By-pass Fixed Pad |
| Capacity (GPD) | 13.2 15 | 16.6 19 | 13.9 17 | 14.0 | 17.0 |
| Voltage (VAC) | 120 OR 24 | 120 OR 24 | 120 230 | 24 | 24 |
| Agency Listed | N/A | N/A | N/A | N/A | N/A |
| Mounting Location | Hot or Cold Air | Hot or Cold Air | Under Duct | Hot or Cold Air | Hot or Cold Air |
| Overflow Protection | Must drain | Must drain | No | Yes | Must drain |
| Drain Type | Yes | Yes | No | No | Yes |
| Humidistat | Yes | Yes | Yes | Yes | Yes |
| All Install Materials | Yes | Yes | Yes | (Note A) | (Note A) |
| Ease of Service | Remove from Duct | Remove from Duct | Remove from Duct | Removing front cover | Removing front cover |
| Construction | Plastic | Plastic | Plastic – Optional Plenum Kit | Galvanized with electro baked enamel | Plastic |
| Brand Name & Model Number | Lau VA4300 | Lau VA4400 | Lau VA5200 | Skuttle 35-1 35-2 38-SE2 | Skuttle 39 |
| Type | By-pass Reservoir | Power Reservoir | Under Duct | By-pass Fixed Pad | Power fixed pad |
| Capacity (GPD) | 17.5 | 18.0 | 21.0 | 15.4 | 16.5 |
| Voltage (VAC) | 24 | 120 | 24 | 120 24 | 120 |
| Agency Listed | N/A | UL | N/A | N/A | N/A |
| Mounting Location | Hot or Cold Air | Hot air | Duct | Hot or Cold Air | Hot air |
| Overflow Protection | Yes | Yes | Yes | Must drain | Must drain |
| Drain Type | No | No | No | Yes | Yes |
| Humidistat | Yes | Yes | Yes | Damper Yes | Yes |
| All Install Materials | Yes | Yes | Yes | No | Yes |
| Ease of Service | Removing front cover | Removing front cover | Clear See thru Case Duct/Clips | Removing front cover | Removing front cover |
| Construction | Plastic | Plastic – May be remote mounted | Plastic | Stainless Steel Do not supply water tubing, drain tubing & by-pass hose | Stainless Steel |
| Brand Name & Model Number | Skuttle 45SH 90SH | Skuttle 55-UD | Skuttle 85 | Skuttle 86-UD | Skuttle 190 |
| Type | By-pass Reservoir | Fixed pad Under Duct | Under Duct | Under Duct | By-pass Reservoir |
| Capacity (GPD) | 11.5 19.2 | 20.0 | 18.0 | 17.0 | 17.0 |
| Voltage (VAC) | 24 | 24 | 24 | 24 | 24 |
| Agency Listed | N/A | N/A | N/A | N/A | N/A |
| Mounting Location | Hot or Cold Air | Duct | Duct | Duct | Hot or Cold Air |
| Overflow Protection | Yes | Must drain | Yes | Yes | Yes |
| Drain Type | No | Yes | No | No | No |
| Humidistat | No | Yes | Yes | Yes | Yes |
| All Install Materials | (Note A) | No | Yes | Yes | (Note A) |
| Ease of Service | Window Removing front cover | Remove from Duct | Remove from Duct | Remove from Duct | Window Removing front cover |
| Construction | Stainless Steel Do not supply drain tubing | Plastic – Do not supply drain tubing | Plastic | Plastic | Plastic |
Note B = Must be connected to hot water for heat pump application
David B. March 31st, 2010
Posted In: Humidifiers
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