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Aprilaire entered the indoor air quality industry in 1938. Less than two decades later, they produced the first marketed, whole-home, evaporative humidifier in the United States. Since that time, they have expanded their product line to include not only humidifiers, but also air cleaners, dehumidifiers, thermostats, ventilation and zone control systems.

The company's focus has always been to design, create and manufacture top level products to help improve indoor air quality. Commitment to discovering new, innovative ways to establish healthy indoor environments, whether in homes or businesses has contributed to Aprilaire remaining a leader in the HVAC industry.

When it is time to replace the filters on your Aprilaire products, such as humidifiers and air cleaners, make sure you choose genuine Aprilaire replacement filters and parts.


Aprilaire filters full product list:


Aprilaire 4226 Humidifier Water Feed Tube & Sleeve
(Aprilaire 4226)

This is an Aprilaire 4226 Humidifier Water Feed Tube and Sleeve replacement for use with the following Aprilaire 500 Series humidifiers: Aprilaire 550, Aprilaire 550A, Aprilaire 558 Humidifier, Aprilaire 560, Aprilaire 560A, Aprilaire 568 Humidifier


Special Order. Ships in 16 days.
Aprilaire 4226 Humidifier Water Feed Tube & Sleeve
Our Price: $52.95
Retail: $61.99
You Save 15%!

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Aprilaire 4235 Humidifier Water Feed Tube
(Aprilaire 4235)

This is an Aprilaire 4235 Humidifier Water Feed Tube and Sleeve replacement for use with the following Aprilaire 700 Series humidifiers: Aprilaire 700, Aprilaire 700A, Aprilaire 700M Humidifier, Aprilaire 760, Aprilaire 760A, Aprilaire 768 Humidifie


Special Order. Ships in 11 days.
Aprilaire 4235 Humidifier Water Feed Tube
Our Price: $14.95
Retail: $16.99
You Save 12%!

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Aprilaire 560 Humidifier Water Distribution Tray
(Aprilaire 4277)

This is an Aprilaire 560 Humdifier Water Distribution Tray replacement for use with the Aprilaire 35 Water Panel Evaporator and the Aprilaire 4236 Scale Control Insert in the following Aprilaire 560 Series humidifiers: Aprilaire 560, Aprilaire 560A,


Special Order. Ships in 20 days.
Aprilaire 560 Humidifier Water Distribution Tray
Our Price: $57.49
Retail: $66.99
You Save 14%!

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Aprilaire 4236 Humidifier Scale Control Insert 12-Pack
(Aprilaire 4236)

This is an Aprilaire 4236 Humidifier Scale Control Insert replacement for use in conjunction with the Aprilaire 35 Water Panel Evaporator and the Aprilaire 4277 Water Distribution Tray in the following Aprilaire humidifiers: Aprilaire 560 Humidifier


Special Order. Ships in 10 days.
Aprilaire 4236 Humidifier Scale Control Insert
Our Price: $155.40

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Aprilaire 4725 Seal Kit for Air Purifier Model 2200 10-Pack
(Aprilaire 4725)

The Aprilaire Spacegard 2200 Air Cleaner Seal Kit (Aprilaire 4725) is for use with the Aprilaire 2200 air cleaner and the Space-Gard 2200 air cleaner. This kit includes the necessary seals which are used to seal the following contacts: (1) between t


Special Order. Ships in 25 days.
Aprilaire 4725 Seal Kit for Air Purifier Model 2200
Our Price: $299.50

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Aprilaire 261 Spacegard 2600 Filter Media Replacement 10-Pack
(Aprilaire 261)

This genuine Spacegard Aprilaire 2600 Filter Media Replacement, also known as the Aprilaire 261 Filter, is the replacement filter used in the Spacegard Aprilaire 2600 Air Cleaner. The Aprilaire 261 Air Filter / Aprilaire 2600 Replacement Filter is a


Special Order. Ships in 8 days.
Aprilaire 261 Spacegard 2600 Filter Media Replacement
Our Price: $649.90

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Aprilaire 4007 Humidifier Orifice White 12-Pack
(4007)

The Aprilaire 4007 is the correct replacement for the following humidifiers: Aprilaire Model 110 Humidifier Aprilaire Model 220 Humidifier


Special Order. Ships in 11 days.
Aprilaire 4007 Humidifier Orifice White
Our Price: $47.88

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Aprilaire 4021 Humidifier Orifice Red
(Aprilaire 4021)

The Aprilaire 4021 is the correct replacement for the following humidifiers: Aprilaire Model 112 Humidifier Aprilaire Model 224 Humidifier


Special Order. Ships in 8 days.
Aprilaire 4021 Humidifier Orifice Red
Our Price: $8.75
Retail: $9.99
You Save 12%!

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Aprilaire 4031 Humidifier Cork Motor Isolator 6-Pack
(4031)

The Aprilaire 4031 is the correct replacement for the following humidifiers: Aprilaire Model 700 Humidifier Aprilaire Model 700 Humidifier Aprilaire Model 700M Humidifier Aprilaire Model 760 Humidifier Aprilaire Model 760A Humidifier


Special Order. Ships in 8 days.
Aprilaire 4031 Humidifier Cork Motor Isolator
Our Price: $59.94

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Aprilaire 4182 Humidifier Water Distribution Tray
(4182)

The Aprilaire 4182 Humidifier Water Distribution Tray evenly distributes water to all of the evaporative panel. The Aprilaire 4182 Water Distribution Tray attaches to the u-shaped scale control insert.


Special Order. Ships in 11 days.
Aprilaire 4182 Humidifier Water Distribution Tray
Our Price: $16.07
Retail: $24.99
You Save 36%!

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Aprilaire 4185 Humidifier Baffle Replacement
(4185)

The Aprilaire 4185 Humidifier Baffle Replacement attaches to the inside of the humidifier's housing and holds the water feed nozzle in place.


Special Order. Ships in 5 days.
Aprilaire 4185 Humidifier Baffle Replacement
Our Price: $15.69
Retail: $22.99
You Save 32%!

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Aprilaire 4187 Humidifier Drain Spud
(4187)

The Aprilaire 4187 Humidifier Drain Spud attaches to the humidifier's base. The drain spud provides a connection for the 1/2" drain hose.


Special Order. Ships in 11 days.
Aprilaire 4187 Humidifier Drain Spud
Our Price: $6.98
Retail: $10.99
You Save 36%!

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Aprilaire 4217 Humidifier Float Chamber
(4217)

The Aprilaire 4217 is a humidifier float chamber filter that works with your Aprilaire 550 and 558 model humidifiers. The Aprilaire 4217 Humidifier Float Chamber is a U-shaped component that encases the water panel inside your humidifier. This will


Special Order. Ships in 16 days.
Aprilaire 4217 Humidifier Float Chamber
Our Price: $52.95
Retail: $61.99
You Save 15%!

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Aprilaire 4236 Humidifier Float Chamber 12-Pack
(4236)

The Aprilaire 4236 is a humidifier float chamber filter that works with your select Aprilaire humidifier. The 4236 is a U-shaped component that encases the water panel inside your humidifier. This will direct any mineral deposit build up back into y


Special Order. Ships in 10 days.
Aprilaire 4236 Humidifier Float Chamber
Our Price: $155.40

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Aprilaire 4237 Humidifier Motor Replacement
(4237)

The Aprilaire 4237 is a humidifier motor replacement for your select Aprilaire whole house humidifier. This motor will keep your humidifier working at its best. This replacement is very easy to install and will save you the time and money.

Free shipping within the continental United States!

Special Order. Ships in 10 days.
Aprilaire 4237 Humidifier Motor Replacement
Our Price: $111.49
Retail: $129.99
You Save 14%!

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Aprilaire 4238 Humidifier Circuit Board
(4238)

The Aprilaire 4238 Humidifier Circuit board is a circuit board replacement for your whole- house, fan powered humidifier. This circuit board will keep your Aprilaire whole-house humidifier working at its best


Special Order. Ships in 10 days.
Aprilaire 4238 Humidifier Circuit Board
Our Price: $53.95
Retail: $62.99
You Save 14%!

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Aprilaire 4240 Humidifier Male Disconnect Assembly
(4240)

The Aprilaire 4240 Humidifier Male Disconnect Assembly is for use in your select 700 series Aprilaire whole-house humidifier. This item plugs into the humidifier base and will make contact with the female disconnect assembly. This is where a wiring


Special Order. Ships in 15 days.
Aprilaire 4240 Humidifier Male Disconnect Assembly
Our Price: $18.66
Retail: $29.99
You Save 38%!

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Aprilaire 4247 Humidifier Fan Blade Replacement
(4247)

The Aprilaire 4247 Humidifier Fan Blade is a genuine replacement for your Aprilaire whole house humidifier system. This humidifier fan blade keeps your Aprilaire 700 series humidifier system working at its best.


Special Order. Ships in 14 days.
Aprilaire 4247 Humidifier Fan Blade Replacement
Our Price: $23.39
Retail: $27.99
You Save 16%!

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Aprilaire 4258 Humidifier Control Relay
(4258)

The Aprilaire 4258 Humidifier Control Relay is used to turn on the fan motor or pump motor of your Aprilaire whole house humidifier. This humidifier relay kit works with your select commercial and residential model of humidifier.


Special Order. Ships in 9 days.
Aprilaire 4258 Humidifier Control Relay
Our Price: $60.53
Retail: $92.99
You Save 35%!

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Aprilaire 4403 Humidifier Float Chamber 6-Pack
(4403)

The Aprilaire 4403 Humidifier Float Chamber is a float chamber for Aprilaire 400 model humidifiers. This float chamber is a U-shaped component that encases the water panel of the humidifier and directs any built-up mineral deposits back into the wat


Special Order. Ships in 54 days.
Aprilaire 4403 Humidifier Float Chamber
Our Price: $233.70

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Aprilaire 4406 Humidifier Float Valve Assembly
(4406)

The Aprilaire 4406 is the correct replacement for the following humidifier: Aprilaire Model 400 Humidifier


Special Order. Ships in 8 days.
Aprilaire 4406 Humidifier Float Valve Assembly
Our Price: $11.84
Retail: $17.99
You Save 34%!

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Aprilaire 4407 Humidifier Water Distribution Tray
(4407)

The Aprilaire 4407 is the correct replacement for the following humidifiers: April Model 400 Humidifier


Special Order. Ships in 9 days.
Aprilaire 4407 Humidifier Water Distribution Tray
Our Price: $21.95
Retail: $24.99
You Save 12%!

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Aprilaire 4410 Humidifier Water Level Sensor
(4410)

The Aprilaire 4410 is the correct replacement for the following humidifiers: Aprilaire Model 400 Humidifier Aprilaire Model 400A Humidifier Aprilaire Model 400M Humidifier


Special Order. Ships in 9 days.
Aprilaire 4410 Humidifier Water Level Sensor
Our Price: $34.88
Retail: $39.99
You Save 13%!

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Aprilaire 4517 Humidifier Power Supply
(4517)

The Aprilaire 4517 Dehumidifier Power Supply is a key component to keeping your whole-house dehumidifier working properly. The 4517 power supply replacement keeps your Aprilaire whole-house dehumidifier working at its best.

Free shipping within the continental United States!

Special Order. Ships in 11 days.
Aprilaire 4517 Humidifier Power Supply
Our Price: $110.99
Retail: $199.99
You Save 45%!

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Aprilaire 4518 Humidifier Control Panel
(4518)

The Aprilaire 4518 Control Panel is for use in your Aprilaire 1700 model dehumidifier. This control panel replacement is specially formulated for your 1700 series model and is a key component in keeping your dehumidifier running properly. This piece

Free shipping within the continental United States!

Special Order. Ships in 9 days.
Aprilaire 4518 Humidifier Control Panel
Our Price: $191.95
Retail: $224.99
You Save 15%!

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