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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.


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Aprilaire filters full product list:


Aprilaire 700 Series Humidifier Cabinet Base
(Aprilaire 4245)

The Aprilaire 700 Series Humidifier Cabinet Base is also known as Aprilaire 4245.


In Stock! Ships in 7 to 8 business days.
Aprilaire 700 Series Humidifier Cabinet Base
Our Price: $73.99
Retail: $99.99
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Aprilaire 4655 Manual Humidifier Humidistat
(4655)

The Aprilaire 4655 is the correct replacement for selected Aprilaire humidifiers.


Special Order. Ships in 8 days.
Aprilaire 4655 Manual Humidifier Humidistat
Our Price: $30.95
Retail: $39.99
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Aprilaire 4788 Maintenance Kit with Water Panel 45
(Aprilaire 4788)

The Aprilaire 400 Series Humidifier Maintenance Kit is for use with Aprilaire 400 Series humidifiers including the Aprilaire 400 Humidifier, Aprilaire 400A Humidifier, Aprilaire 400M Humidifier, and other compatible Aprilaire 400 humidifier models.


Special Order. Ships in 8 days.
Aprilaire 4788 Maintenance Kit with Water Panel 45
Our Price: $69.99
Retail: $89.99
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FiltersFast A35PR Replacement for BDP P1103545 Filter
(BDP P1103545 1R)

The BDP P1103545 Metal Humidifier Water Panel Filter is the correct compatible replacement for the following models of humidifiers: BDP HUMBBLBP2317 BDP HUMBBLBP2317-A BDP HUMBBLFP1318A BDP HUMBBLBP2217-A BDP P110LFP1318 BDP P110LFP1318A


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FiltersFast A35PR Replacement for BDP P1103545 Filter
As Low As: $7.95
Retail: $9.99
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American Standard BAYPAD01A1010A Paper Filter
(BAYPAD01A1010A 3R)

The American Standard BAYPAD01A1010A Paper Water Panel Filter features honeycomb filtration to trap mineral pollutants found in water and help prevent them from entering your home.


Out of stock
American Standard BAYPAD01A1010A Paper Filter
Our Price: $15.99
Retail: $19.99
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Aprilaire 6737 Rectangular Vent Damper - 10" x 20"
(Aprilaire 6737)

The Aprilaire 6737 Rectangular Vent Damper - 10" x 20" is ideal for use in residential applications. This rectangular duct damper features an exclusive Flexible Link design and installs in 4.24" slots within the duct. This Aprilaire damper features

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Special Order. Ships in 8 days.
Aprilaire 6737 Rectangular Vent Damper - 10" x 20"
Our Price: $143.71
Retail: $149.99
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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 9 days.
Aprilaire 4182 Humidifier Water Distribution Tray
Our Price: $15.07
Retail: $25.00
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Aprilaire 4246 Humidifier Water Distribution Tray
(Aprilaire 4246)

This is an Aprilaire 760 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 760 Series humidifiers: Aprilaire 700, Aprilaire 760,


Special Order. Ships in 6 days.
Aprilaire 4246 Humidifier Water Distribution Tray
Our Price: $16.95
Retail: $19.99
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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 9 days.
Aprilaire 4517 Humidifier Power Supply
Our Price: $109.99
Retail: $199.99
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FiltersFast A12PR Replacement for Chippewa 224
(Chippewa 224 1R)

The Chippewa 224 Metal Humidifier Water Panel Filter measures 14-3/4" x 1-5/8" x 11-3/8" (approx.), and is the correct replacement evaporator pad for many humidifier models manufactured by Chippewa, AprilAire and Walton.


In stock! Ships in 1 business day.
FiltersFast A12PR Replacement for Chippewa 224
Our Price: $13.95
Retail: $14.99
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Aprilaire 4232 Humidifier Orifice Blue
(Aprilaire 4232)

This Aprilaire 4232 Humidifier Orifice (Blue) is used in many Aprilaire humidifiers including the following Aprilaire humidifier models: Aprilaire 350 Humidifier, Aprilaire 360 Humidifier, Aprilaire 440 Humidifier, Aprilaire 700 Humidifier, Aprilair


In Stock! Ships in 13 to 14 business days.
Aprilaire 4232 Humidifier Orifice Blue
Our Price: $3.30
Retail: $5.99
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Aprilaire 51 Furnace Current Sensing Relay
(Aprilaire 51)

The Aprilaire 51 is the correct replacement for the following humidifiers:Aprilaire Humidifiers Honeywell HE220, HE225, HE260, HE265, HE360 and HE365 Humidifiers


Special Order. Ships in 8 days.
Aprilaire 51 Furnace Current Sensing Relay
Our Price: $40.99
Retail: $64.70
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Aprilaire 4349 Humidifier Door Catch for 2200 2400 4-Pack 4-Pack
(4349)

The Aprilaire 4349 Humidifier Door Catch for 2200 2400 is a door catch replacement kit for Aprilaire humidifier models 2200 and 2400. This Aprilaire door catch is designed for new style doors. This Aprilaire kit includes a door catch, form seal, and


Special Order. Ships in 8 days.
Aprilaire 4349 Humidifier Door Catch for 2200 2400 4-Pack
Our Price: $20.80

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Aprilaire 6706 - 6" Round Damper - Slip-In
(Aprilaire 6706)

The Aprilaire 6706 - 6" Round Damper - Slip-In is a spring-return damper designed to be inserted in a six inch round branch duct. This HVAC damper helps zone your home without costly duct modification. The Aprilaire damper provides true comfort thro


Special Order. Ships in 7 days.
Aprilaire 6706 - 6" Round Damper - Slip-In
Our Price: $68.95
Retail: $79.99
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Aprilaire 6725 - Rectangular Damper 8" x 16"
(Aprilaire 6725)

The Aprilaire 6725 is an automatic damper of the following size: 8 inches x 16 inches The Aprilaire 6725 - Rectangular Damper 8" x 16" is a rectangular duct damper. This ventilation damper is motorized for zone control systems. This motorized

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Special Order. Ships in 13 days.
Aprilaire 6725 - Rectangular Damper  8" x 16"
Our Price: $126.00
Retail: $149.99
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Aprilaire 4594 Duct Mounted Humidistat
(4594)

The Aprilaire 4594 Duct Mounted Humidistat is for use in your Aprilaire 1150,1160, and 800 model whole-house humidifier system. These steam humidifiers are self contained systems and the humidifier humidistat measures and controls the relative humid

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Special Order. Ships in 10 days.
Aprilaire 4594 Duct Mounted Humidistat
Our Price: $184.00
Retail: $199.99
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Aprilaire 6723 Rectangular Damper 8"x 12"
(Aprilaire 6723)

The Aprilaire 6723 is an automatic damper of the following size: 8 inches x 12 inches The Rectangular Damper 8"x 12" - Aprilaire 6723 is a rectangular duct damper. This ventilation damper is motorized for zone control systems. This motorized d

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Special Order. Ships in 7 days.
Aprilaire 6723 Rectangular Damper 8"x 12"
Our Price: $140.00
Retail: $189.99
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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 8 days.
Aprilaire 4407 Humidifier Water Distribution Tray
Our Price: $20.95
Retail: $24.99
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Aprilaire 4005 Water Solenoid Valve Assembly
(4005)

The Aprilaire 4005 is the correct replacement for the following humidifiers: Aprilaire Model 110 Humidifier Aprilaire Model 112 Humidifier


Special Order. Ships in 9 days.
Aprilaire 4005 Water Solenoid Valve Assembly
Our Price: $74.99
Retail: $89.99
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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 9 days.
Aprilaire 4725 Seal Kit for Air Purifier Model 2200
Our Price: $289.50

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Aprilaire Humidifier Solenoid Valve for 350 & 360
(Aprilaire 4191)

The Aprilaire Humidifier Solenoid Valve is also known as Aprilaire 4191.


Special Order. Ships in 9 days.
Aprilaire Humidifier Solenoid Valve for 350 & 360
Our Price: $54.98
Retail: $74.99
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Aprilaire 4040 Humidifier Solenoid Valve - 24 Volt
(Aprilaire 4040)

This is an Aprilaire 4040 Humidifier Solenoid Valve replacement that allows the water to come in to your Aprilaire humidifier. It is compatible for use in all Aprilaire humidifier models except for commercial units and residential models Aprilaire 1


In stock! Ships in 1 business day.
Aprilaire 4040 Humidifier Solenoid Valve - 24 Volt
Our Price: $81.49
Retail: $99.99
You Save 19%!

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Aprilaire 4332 Humidifier Damper Assembly
(4332)

The Aprilaire 4332 Humidifier Damper Assembly is a damper assembly kit that includes a damper blade, spring, and knob. This Aprilaire humidifier kit is designed for Aprilaire humidifier models 400, 500, 550, and 600. This is a genuine Aprilaire part


Special Order. Ships in 12 days.
Aprilaire 4332 Humidifier Damper Assembly
Our Price: $20.00
Retail: $28.00
You Save 29%!

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Aprilaire 6612 Automatic Ventilation Damper - 12"
(Aprilaire 6612)

The Aprilaire 6612 is a round ventilation damper of the following size: 12 inches diameter The Aprilaire 6612 Automatic Ventilation Damper - 12" is a motorized damper with durable 24 gauge construction. This automatic vent damper features a po

Free shipping within the continental United States!

Special Order. Ships in 10 days.
Aprilaire 6612 Automatic Ventilation Damper - 12"
Our Price: $112.00
Retail: $149.99
You Save 25%!

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Aprilaire 4231 Humidifier Orifice Yellow 12-Pack
(Aprilaire 4231)

This Aprilaire 4231 Humidifier Orifice (Yellow) is used in many Aprilaire humidifiers including the following Aprilaire humidifier models: Aprilaire 400 Humidifier, Aprilaire 400A Humidifier, Aprilaire 400M Humidifier, Aprilaire 500 Humidifier, Apri


Special Order. Ships in 10 days.
Aprilaire 4231 Humidifier Orifice Yellow
Our Price: $39.60

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