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Aprilaire Filters Aprilaire Humidifiers & Supplies
We specialize in brand new, high-quality Aprilaire products! As a "brick and mortar" Aprilaire dealer for over 25 years, we sell top-quality Aprilaire air filters, Aprilaire humidifiers, Space-Gard filters, and other OEM Aprilaire products that we have installed and tested in the field. That means you can be confident that you won't make a mistake when you buy an Aprilaire or Space-Gard filter or humidifier from DiscountFurnaceFilter.com.

A few of our most popular items are the Aprilaire 700 humidifier, Aprilaire 600 humidifier, Space-Gard #201 filter and Space-Gard #401 media filters that fit the Space-Gard media filter cabinets. We also carry the Aprilaire 400 humidifier and the Aprilaire 500 humidifier, Aprilaire #10 water panel, and Aprilaire #35 water panel.

Whether you need a Aprilaire bypass humidifier or Aprilaire / Space-Gard filter to make your entire home more comfortable, you came to the right place. You may browse our selection of Aprilaire and Space-Gard products and simply click "Add to Cart" once you identify the item you want to purchase!
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Aprilaire 700A Power Spray Humidifier (Automatic Control) Aprilaire 700M Humidifier (Manual Control) Aprilaire 600A Humidifier (Automatic Control)
List Price: $329.95
Our Price: $234.00
List Price: $299.95
Our Price: $204.00
List Price: $289.95
Our Price: $162.00
Aprilaire Model 700M
The Aprilaire 700A Power Spray Humidifier - automatic humidification for homes up to 4,200 square feet. The Aprilaire 700M Humidifier (Manual Control) - Brand New Model! The Aprilaire 600A Humidifier - automatic humidification for homes up to 4,000 square feet.
Aprilaire 600M Humidifier (Manual Control) Aprilaire 500A Humidifier (Automatic Control) Aprilaire 500M Humidifier (Manual Control)
List Price: $209.95
Our Price: $127.00
List Price: $239.95
Our Price: $138.00
List Price: $179.95
Our Price: $115.00
Aprilaire 500M Humidifier
The Aprilaire 600M Humidifier - manually-controlled humidification for homes up to 4,000 square feet. The Aprilaire 500A Humidifier - automatic humidification for homes up to 3,000 square feet. The Aprilaire 500M Humidifier - manually-controlled humidification for homes up to 3,000 square feet.
Aprilaire 5000 Replacement Filter Media Aprilaire 400A Humidifier (Automatic Control) Aprilaire 5000 Electronic Air Cleaner
List Price: $54.95
Our Price: $44.95
List Price: $289.95
Our Price: $181.00
List Price: $649.95
Our Price: $419.95
Aprilaire #501 Filter Aprilaire 5000 - Clean, Healthy Air!
Aprilaire 501 Replacement Filter Media for the Aprilaire 5000 Electronic Air Cleaner. Patented, breakthrough technology provides air cleaning performance never before possible. The Aprilaire 400A Humidifier - Water-conserving humidifier for homes up to 4,000 square feet. Patented, breakthrough technology provides air cleaning performance never before possible. New, improved Aprilaire 5000 model straight from manufacturer!
Aprilaire / Space-Gard #201 Replacement Furnace Filter (2-Pack) Aprilaire / Space-Gard #401 Replacement Furnace Filter (2-Pack) Aprilaire Replacement Water Panel (RP #35) For 560/600/700/Lennox WB2-17/WP2-18 Humidifier (2-Pack)
List Price: $79.95
Our Price: $56.95
List Price: $79.95
Our Price: $56.95
List Price: $39.00
Our Price: $26.00
Convenient 2-Pack of Aprilaire / Space-Gard #201 replacement furnace filters for air cleaner model 2200 and 2250. Convenient 2-Pack of Aprilaire / Space-Gard #401 replacement furnace filter for air cleaner model 2400. Convenient 2-Pack of Aprilaire / Lennox Replacement Water Panel For 600 / 700 / WB2-17 / WB2-18 Humidifier. Fits Aprilaire 600, 600A, 600M, 700, 700A, 700M and Lennox WB2-17 bypass humidifiers and Lennox WB2-18 power humidifier.
Aprilaire Replacement Water Panel (RP #10) For Model 500 / 550 / Lennox WB2-12 Humidifier (2-Pack) Aprilaire Replacement Water Panel (RP #35) For 560/600/700/Lennox WB2-17/WP2-18 Humidifier Aprilaire Humidifier #12 Replacement Water Panel
List Price: $39.00
Our Price: $23.75
List Price: $19.50
Our Price: $13.75
List Price: $19.50
Our Price: $13.50
Convenient 2-Pack of Aprilaire / Lennox Replacement Water Panel For 500 / 550 / WB2-12 Humidifier. Fits the Aprilaire 500, 550 and Lennox WB2-12 bypass humidifiers. Aprilaire / Lennox Replacement Water Panel For 600 / 700 / WB2-17 / WB2-18 Humidifier. Fits Aprilaire 600, 600A, 600M, 700, 700A, 700M and Lennox WB2-17 bypass humidifiers and Lennox WB2-18 power humidifier. Aprilaire Humidifier #12 Replacement Water Panel
Aprilaire Replacement Water Panel (RP #10) For Model 500 / 550 / Lennox WB2-12 Humidifier Aprilaire 400 Humidifier Water Panel (2-Pack) Aprilaire Bypass Damper Assembly
List Price: $19.50
Our Price: $12.75
List Price: $44.95
Our Price: $29.99
List Price: $29.95
Our Price: $24.95
Aprilaire bypass damper
Aprilaire / Lennox Replacement Water Panel For 500A / 500M / 500 / 550 / WB2-12 Humidifier. Fits the Aprilaire 500, 550 and Lennox WB2-12 bypass humidifiers. Aprilaire 400 Humidifier Replacement Water Panel (2-Pack) Aprilaire Bypass Damper Assembly.
Aprilaire #58 Automatic Digital Humidity Control RP 4010 24VAC Transformer Aprilaire #50 Current Sensing Relay
List Price: $139.95
Our Price: $89.00
List Price: $34.95
Our Price: $22.25
List Price: $49.95
Our Price: $35.50
Aprilaire Digital Humidistat
Aprilaire #58 Automatic Digital Humidity Control. RP 4010 24VAC Transformer Aprilaire #50 Current Sensing Relay for 24V applications.
Aprilaire #51 Current Sensing Relay Aprilaire 1213 Upgrade Kit Aprilaire 1413 Upgrade Kit
List Price: $54.95
Our Price: $39.95
List Price: $125.00
Our Price: $70.00
List Price: $125.00
Our Price: $70.00
Aprilaire 1213 Kit Aprilaire 1413 Kit
Aprilaire #51 Current Sensing Relay for 120V applications. Aprilaire 1213 Upgrade Kit for the Aprilaire 2200 media air cleaner. Aprilaire 1413 Upgrade Kit for the Aprilaire 2400 media air cleaner.
Aprilaire 4200 Media Air Cleaner Aprilaire 4400 Media Air Cleaner Aprilaire 413 Replacement Filter - fits the Aprilaire 4400 Media Air Cleaner
Our Price: $184.99
Our Price: $184.99
Our Price: $48.99
Aprilaire 4200 Air Filter System Aprilaire 4400 Air Filter System Aprilaire 413 Air Filter
The Aprilaire 4200 Media Air Cleaner sets a new paradigm in MERV 13 "active" whole-house air filtration. The Aprilaire 4400 Media Air Cleaner sets a new paradigm in MERV 13 "active" whole-house air filtration. The Aprilaire 413 MERV 13 air filter fits the Aprilaire 4400 media air cleaner.
Aprilaire 213 Replacement Filter - fits the Aprilaire 4200 Media Air Cleaner Pleat Spacer for Space-Guard / Aprilaire 2200 Media Air Cleaner (5-pack) Pleat Spacer for Space-Guard / Aprilaire 2400 Media Air Cleaner (6-pack)
Our Price: $48.99
Our Price: $85.00
Our Price: $85.00
Aprilaire 213 Air Filter
The Aprilaire 213 MERV 13 air filter fits the Aprilaire 4200 media air cleaner. 5-pack of pleat spacers for the Space-Guard / Aprilaire 2200 Media Air Cleaner. 6-pack of pleat spacers for the Space-Guard / Aprilaire 2400 Media Air Cleaner.