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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 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.

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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

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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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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 12 days.
Aprilaire 4594 Duct Mounted Humidistat
Our Price: $185.00
Retail: $216.99
You Save 15%!

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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 11 days.
Aprilaire 4640 Humidifier Scale Control Insert
Our Price: $169.50

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

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


Special Order. Ships in 7 days.
Aprilaire 4851 Humidifier Blower Activation Relay
Our Price: $259.50

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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 11 days.
Aprilaire 50 Humidifier Current Sensing Ray
Our Price: $28.00
Retail: $46.99
You Save 40%!

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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.

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Special Order. Ships in 20 days.
Aprilaire 5158 Air Flow Measuring Device
Our Price: $102.11
Retail: $271.99
You Save 62%!

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Aprilaire 4405 Humidifier Float Cover 4405
(4405)

The Aprilaire 400 is the correct replacement for the following humidifiers: Aprilaire 400 Humidifier Aprilaire 400A Humidifier Aprilaire 400M Humidifier Aprilaire 600 Humidifier


Special Order. Ships in 5 days.
Aprilaire 4405 Humidifier Float Cover 4405
Our Price: $17.95
Retail: $19.99
You Save 10%!

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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 10 days.
Aprilaire 51 Furnace Current Sensing Relay
Our Price: $54.95
Retail: $64.99
You Save 15%!

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Aprilaire 6210 - 10" Duct Static Bypass
(Aprilaire 6210)

The 10" Duct Static Bypass - Aprilaire 6210 is a static pressure bypass damper with a round shape. The Aprilaire static bypass measures 10 inches in diameter and provides a heightened level of control for your zoning applications. This 10" static by

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Special Order. Ships in 9 days.
Aprilaire 6210 - 10" Duct Static Bypass
Our Price: $319.75
Retail: $374.99
You Save 15%!

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Aprilaire 6212 - 12" Duct Static Bypass
(Aprilaire 6212)

The 12" Duct Static Bypass - Aprilaire 6212 is a static pressure bypass damper with a round shape. The Aprilaire static bypass measures 12 inches in diameter and provides a heightened level of control for your zoning applications. This 12" static by

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Special Order. Ships in 9 days.
Aprilaire 6212 - 12" Duct Static Bypass
Our Price: $322.59
Retail: $378.99
You Save 15%!

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Aprilaire 6214 - 14" Duct Static Bypass
(Aprilaire 6214)

The 14" Duct Static Bypass - Aprilaire 6214 is a static pressure bypass damper with a round shape. The Aprilaire static bypass measures 14 inches in diameter and provides a heightened level of control for your zoning applications. This 14" static by

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Special Order. Ships in 9 days.
Aprilaire 6214 - 14" Duct Static Bypass
Our Price: $331.02
Retail: $388.99
You Save 15%!

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Aprilaire 6216 16" Duct Static Bypass
(Aprilaire 6216)

The 16" Duct Static Bypass - Aprilaire 6216 is a static pressure bypass damper with a round shape. The Aprilaire static bypass measures 16 inches in diameter and provides a heightened level of control for your zoning applications. This 16" static by

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Special Order. Ships in 9 days.
Aprilaire 6216 16" Duct Static Bypass
Our Price: $368.97
Retail: $432.99
You Save 15%!

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Aprilaire 6218 18" Round Static Bypass Damper
(Aprilaire 6218)

The 18" Duct Static Bypass - Aprilaire 6218 is a static pressure bypass damper with a round shape. The Aprilaire static bypass measures 18 inches in diameter and provides a heightened level of control for your zoning applications. This 18" static by

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Special Order. Ships in 15 days.
Aprilaire 6218 18" Round Static Bypass Damper
Our Price: $372.48
Retail: $437.99
You Save 15%!

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Aprilaire 6220 20" Duct Static Bypass
(Aprilaire 6220)

The 20" Duct Static Bypass - Aprilaire 6220 is a static pressure bypass damper with a round shape. The Aprilaire static bypass measures 20 inches in diameter and provides a heightened level of control for your zoning applications. This 20" static by

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Special Order. Ships in 9 days.
Aprilaire 6220 20" Duct Static Bypass
Our Price: $433.62
Retail: $508.99
You Save 15%!

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Aprilaire 8081 Temperature Sensor Module
(Aprilaire 8081)

The Aprilaire 8081 Temperature Sensor Module is designed for use with the Aprilaire model 8800 Universal Communicating Thermostat and supports one onboard and one external temperature sensor. This temperature module can be used to monitor temperatur

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Special Order. Ships in 12 days.
Aprilaire 8081 Temperature Sensor Module
Our Price: $91.95
Retail: $106.99
You Save 14%!

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Aprilaire 6506 - 6" Automatic Vent Damper
(6506)

The Aprilaire 6506 - 6" Automatic Vent Damper measures 6 inches in diameter and works well with either rigid metal or flex duct. The Aprilaire closed damper features adjustable blade positioning and an integrated foam seal for flexibility with any z

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Special Order. Ships in 8 days.
Aprilaire 6506 - 6" Automatic Vent Damper
Our Price: $124.95
Retail: $143.95
You Save 13%!

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Aprilaire 6606 Motorized Damper - 6"
(Aprilaire 6606)

The Aprilaire 6606 Motorized Damper - 6" measures 6 inches in diameter and works well with either rigid metal or flex duct. The Aprilaire closed damper features adjustable blade positioning and an integrated foam seal for flexibility with any zone j

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Special Order. Ships in 11 days.
Aprilaire 6606 Motorized Damper - 6"
Our Price: $199.95
Retail: $229.95
You Save 13%!

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Aprilaire 6607 - 7" Automatic Vent Damper
(Aprilaire 6607)

The Aprilaire 6607 - 7" Automatic Vent Damper measures 7 inches in diameter and works well with either rigid metal or flex duct. The Aprilaire closed damper features adjustable blade positioning and an integrated foam seal for flexibility with any z

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Special Order. Ships in 13 days.
Aprilaire 6607 - 7" Automatic Vent Damper
Our Price: $88.00
Retail: $102.99
You Save 15%!

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Aprilaire 6609 - Zone Control 9" Vent Damper
(Aprilaire 6609)

The Aprilaire 6609 - Zone Control 9" Vent Damper measures 9 inches in diameter and works well with either rigid metal or flex duct. The Aprilaire closed damper features adjustable blade positioning and an integrated foam seal for flexibility with an

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Special Order. Ships in 7 days.
Aprilaire 6609 - Zone Control 9" Vent Damper
Our Price: $129.95
Retail: $149.95
You Save 13%!

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Aprilaire 6610 - 10" Zone Control Vent Damper
(Aprilaire 6610)

The Aprilaire 6610 is a round ventilation damper of the following size: 10 inches diameter The Aprilaire 6610 - 10" Zone Control Vent Damper is a motorized damper with durable 24 gauge construction. This automatic vent damper features a positi

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Special Order. Ships in 9 days.
Aprilaire 6610 - 10" Zone Control Vent Damper
Our Price: $114.95
Retail: $132.95
You Save 14%!

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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

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Special Order. Ships in 12 days.
Aprilaire 6612 Automatic Ventilation Damper - 12"
Our Price: $119.95
Retail: $149.99
You Save 20%!

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Aprilaire 6616 Motorized Damper - 16"
(Aprilaire 6616)

The Aprilaire 6616 is a round ventilation damper of the following size: 16 inches diameter The Aprilaire 6616 Motorized Damper - 16" is a motorized damper with durable 24 gauge construction. This automatic vent damper features a position indic

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Special Order. Ships in 11 days.
Aprilaire 6616 Motorized Damper - 16"
Our Price: $122.00
Retail: $142.99
You Save 15%!

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Aprilaire 6618 - 18" Automatic Ventilation Damper
(Aprilaire 6618)

The Aprilaire 6618 is a round ventilation damper of the following size: 18 inches diameter The Aprilaire 6618 - 18" Automatic Ventilation Damper 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 12 days.
Aprilaire 6618 - 18" Automatic Ventilation Damper
Our Price: $204.97
Retail: $239.99
You Save 15%!

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Aprilaire 6620 - 20" Automatic Vent Damper
(Aprilaire 6620)

The Aprilaire 6620 is a round ventilation damper of the following size: 20 inches diameter The Aprilaire 6620 - 20" Automatic Vent Damper is a motorized damper with durable 24 gauge construction. This automatic vent damper features a position

Free shipping within the continental United States!

Special Order. Ships in 9 days.
Aprilaire 6620 - 20" Automatic Vent Damper
Our Price: $206.55
Retail: $241.99
You Save 15%!

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Filters Fast - Aprilaire filters

" Thank you for your expert service when helping me get the proper filters for my old pool and filter system. The new ones are perfect and work very well. All the best! " - Jim, Alamo, CA
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