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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 4021 Humidifier Orifice Red
(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: $7.75
Retail: $9.99
You Save 22%!

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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 6 days.
Aprilaire 4031 Humidifier Cork Motor Isolator
Our Price: $53.94

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Aprilaire 4183 Humidifier Water Distribution Tray
(4183)

The Aprilaire 4183 Humidifier Water Distribution Tray Cover is a plastic cover that fits into the top of the humidifier water distribution tray. This water tray cover weighs 2.4 ounces.


Special Order. Ships in 3 days.
Aprilaire 4183 Humidifier Water Distribution Tray
Our Price: $16.00
Retail: $25.00
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 3 days.
Aprilaire 4185 Humidifier Baffle Replacement
Our Price: $14.69
Retail: $22.38
You Save 34%!

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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 10 days.
Aprilaire 4187 Humidifier Drain Spud
Our Price: $5.98
Retail: $10.99
You Save 46%!

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Aprilaire 4184 Water Distribution Tray Nozzle
(Aprilaire 4184)

This is an Aprilaire 4184 Water Distribution Tray Nozzle replacement for the Aprilaire 350 Humidifier, Aprilaire 360 Humidifier, Aprilaire 550 Humidifier, Aprilaire 560 Humidifier, Aprilaire 560A Humidifier, and Aprilaire 568 Humidifier. It fits Apr


Special Order. Ships in 9 days.
Aprilaire 4184 Water Distribution Tray Nozzle
Our Price: $15.99
Retail: $19.99
You Save 20%!

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Aprilaire 4223 Humidifier Drain Spud Kit 6-Pack
(Aprilaire 4223)

The Aprilaire 4223 Humidifier Drain Spud Kit is a humidifier component replacement kit used in all Aprilaire 500 Series and Aprilaire 600 Series humidifiers including the Aprilaire 500 Humidifier, Aprilaire 550 Humidifier, Aprilaire 550A humidifier,


Special Order. Ships in 11 days.
Aprilaire 4223 Humidifier Drain Spud Kit
Our Price: $31.50

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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 9 days.
Aprilaire 4235 Humidifier Water Feed Tube
Our Price: $13.95
Retail: $14.99
You Save 7%!

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Aprilaire 4331 Humidifier Water Distribution Tray
(Aprilaire 4331)

This is an Aprilaire 4331 Humidifier Water Distribution Tray replacement for use in conjunction with the Aprilaire Water Panel Evaporator and the Aprilaire Scale Control Insert in the following Aprilaire 500 Series and Aprilaire 600 Series humidif


Special Order. Ships in 10 days.
Aprilaire 4331 Humidifier Water Distribution Tray
Our Price: $22.49
Retail: $24.99
You Save 10%!

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Aprilaire 4330 Humidifier Scale Control Insert 8-Pack
(Aprilaire 4330)

This is an Aprilaire 4330 Humidifier Scale Control Insert replacement for use in conjunction with the Aprilaire Water Panel Evaporator and the Aprilaire Water Distribution Tray in the following Aprilaire humidifiers: Aprilaire 600 Humidifiers, April


Special Order. Ships in 7 days.
Aprilaire 4330 Humidifier Scale Control Insert
Our Price: $79.92

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Spacegard Aprilaire 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 7 days.
Spacegard Aprilaire 2600 Filter Media Replacement
Our Price: $639.90

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Aprilaire 4335 Feed Tube Assembly with Sleeve
(Aprilaire 4335)

This is an Aprilaire 4335 Humidifier Water Feed Tube and Sleeve replacement for use with the following Aprilaire humidifiers: Aprilaire 400, Aprilaire 400A, Aprilaire 400M Humidifier, Aprilaire 500 Humidifier, Aprilaire 500A Humidifier, Aprilaire 50


Special Order. Ships in 12 days.
Aprilaire 4335 Feed Tube Assembly with Sleeve
Our Price: $10.50

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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 8 days.
Aprilaire 4236 Humidifier Scale Control Insert
Our Price: $143.40

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Aprilaire Humidifier Saddle Valve - Aprilaire 4001
(Aprilaire 4001)

This Aprilaire Humidifier Saddle Valve (Aprilaire 4001) is used with the Aprilaire 4040 Humidifier Solenoid Valve in numerous Aprilaire humidifier models. The Aprilaire Saddle Valve is a self tappin


Special Order. Ships in 9 days.
Aprilaire Humidifier Saddle Valve - Aprilaire 4001
Our Price: $10.95
Retail: $12.99
You Save 16%!

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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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Aprilaire 4785 Maintenance Kit with Water Panel 35
(Aprilaire 4785)

The Aprilaire 350 / Aprilaire 360 Humidifier Maintenance Kit is a set of humidifier replacement parts for use with the Aprilaire 350 humidifier and Aprilaire 360 humidifier.


Special Order. Ships in 9 days.
Aprilaire 4785 Maintenance Kit with Water Panel 35
Our Price: $78.85
Retail: $99.99
You Save 21%!

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Aprilaire 4640 Humidifier Scale Control Insert 10-Pack
(4640)

The Aprilaire 4640 Humidifier Scale Control Insert is for use in your 500 series model humidifier. This Aprilaire humidifier scale control is a U-shaped piece that encases your humidifiers water panel evaporator.


Special Order. Ships in 9 days.
Aprilaire 4640 Humidifier Scale Control Insert
Our Price: $124.20

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Aprilaire 4079 Humidifier Feed Tube and Nozzle
(Aprilaire 4079)

The Aprilaire 4079 Humidifier Feed Tube and Nozzle is the replacement component for Aprilaire humidifier system model numbers 440, 350 and 360. Allows for a flow rate of 6 GPH.


Special Order. Ships in 10 days.
Aprilaire 4079 Humidifier Feed Tube and Nozzle
Our Price: $10.99
Retail: $14.33
You Save 23%!

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Aprilaire 4670 Powered Humidifier Motor
(4670)

The Aprilaire 4670 is the correct replacement for the following humidifiers: Aprilaire Model 700A Humidifier Aprilaire Model 700M Humidifier

Free shipping within the continental United States!

Special Order. Ships in 7 days.
Aprilaire 4670 Powered Humidifier Motor
Our Price: $143.57
Retail: $149.99
You Save 4%!

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Aprilaire 4732 Base for Aprilaire 700A 700M
(4732)

The Aprilaire 4732 is the correct replacement for the following humidifiers: Aprilaire Model 700A Humidifier Aprilaire Model 700M Humidifier


Special Order. Ships in 7 days.
Aprilaire 4732 Base for Aprilaire 700A 700M
Our Price: $73.99
Retail: $79.99
You Save 8%!

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Aprilaire 4740 Humidifier Fan Relay for 700A 700M
(4740)

The Aprilaire 4740 is the correct replacement for the following humidifiers: Aprilaire Model 700A Humidifier Aprilaire Model 700M Humidifier


Special Order. Ships in 14 days.
Aprilaire 4740 Humidifier Fan Relay for 700A 700M
Our Price: $15.98
Retail: $22.99
You Save 30%!

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Aprilaire 4851 Humidifier Blower Activation Relay 10-Pack
(4851)

The Aprilaire 4851 is the correct replacement for the following humidifiers: Aprilaire 500 Series Humidifiers Aprilaire 600 Series Humidifiers Aprilaire 700 Series Humidifiers


Special Order. Ships in 5 days.
Aprilaire 4851 Humidifier Blower Activation Relay
Our Price: $240.00

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Aprilaire 50 Humidifier Current Sensing Ray
(Aprilaire 50)

The Aprilaire 50 is the correct replacement for the following humidifiers: Aprilaire, Honeywell HE220, HE225, HE260, HE265, HE360 and HE365 humidifiers.


Special Order. Ships in 12 days.
Aprilaire 50 Humidifier Current Sensing Ray
Our Price: $27.00
Retail: $46.62
You Save 42%!

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Aprilaire EZ Kleen Filter Replacement 2-Pack 2-Pack
(5153)

The Aprilaire 5153 fits the following model ventilator: 8100 Energy Recovery Ventilator Aprilaire EZ Kleen Filter Replacement 2-Pack is a washable replacement filter.


Special Order. Ships in 10 days.
Aprilaire EZ Kleen Filter Replacement 2-Pack
Our Price: $43.00

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Aprilaire 5158 Air Flow Measuring Device
(5158)

The Aprilaire 5158 fits the following model ventilator: Aprilaire 8100 Energy Recovery Ventilator The Aprilaire 5158 Air Flow Measuring Device measures the air flow inside the Aprilaire 8100 Energy Recovery Ventilator.

Free shipping within the continental United States!

Special Order. Ships in 4 days.
Aprilaire 5158 Air Flow Measuring Device
Our Price: $101.11
Retail: $271.63
You Save 63%!

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