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Aprilaire Water Panel 45

Use Aprilaire Water Panel 45 to deliver the proper humidity to your home. Replace twice a season for peak performance. The Aprilaire water panel 45 fits the Aprilaire Humidifier 400, 400A, and 400M.

  • Water panel 45 dimensions are 10” x 12 ¾” x 1 ¾”

  • Replace twice a season

  • Conveniently packaged in a 2 pack

  • Aprilaire engineered quality and reliability

Buy Now
Total: $

Right Choice

Get it straight from the source!

  • Genuine Aprilaire replacement parts made by Aprilaire in Wisconsin U.S.A.

  • Made specifically for Aprilaire humidifier for best fit and performance

  • Interested in keeping your humidifier operating like new? Why not order a maintenance kit?




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  • water panel evaporator 45 2-pack

    Posted by: walt


    no problem. I'm satisfied

  • water panel evaporator pack

    Posted by: S. Fried


    Your staff who answered my phone call was very helpful, answering all my questions and making suggestions which saved me money. I loved working with your staff and receiving my water panel in perfect condition quickly.

  • 4:30 PM

    Posted by: Joe R.


    Received my order in a very timely manner. Installed the filter and it is working wonderfully.

  • Water panel review

    Posted by: D. Wygal


    Fast delivery, & easy to install--the directions were right on the box!

  • Satisfaction

    Posted by: Edward Howard


    Very pleased with the prompt and excellent service.

  • 10am

    Posted by: Walter Hrubesky


    They arrived as stated. and they are what I expected and installed with no problems!

  • Filters

    Posted by: Lou


    Outstanding product and service.

  • Satisfied

    Posted by: Paul Freedenberg


    Very convenient and easy to use, with a great product.

  • good product /bad shipping...

    Posted by: Big Bill


    shipping charges way too expensive....

  • Water panel

    Posted by: SR


    Like the discount and very easy process of ordering and receiving the panels

  • Water Panel/#45 2- Feedback

    Posted by: John Riddick


    Very functional heating apparatus, ease of installation, and great Aprilaire support for internet purchase.

  • early notice and offer

    Posted by: happy customer


    receiving the email notice and offer for the water panel was great as a reminder to change it and also a value. Hope you continue to do it.

  • very satisfied

    Posted by: jaf


    ordered water panels on line..nice discount was offered..package arrived in 2 days..ordering easy..product fine..... third time went without issues.. would recommend

  • Excellent Service

    Posted by: Parislady


    Received in 2 days excellent service

  • Aprilaire Water Panel

    Posted by: Lourdes


    The simple navigation of the website and checkout process made my purchase experience very pleasant. The product was delivered promptly and the way the packaging was done ensured that no damage was done during transit. I will definitely continue to order my water panels from Aprilaire.

  • Great Service

    Posted by: Rick


    Excellent service every time I do business with Aprolaire

  • Owner

    Posted by: Anonymous


    When I called for some info the person whom answered my question was very knowledgable. Item was delivered exactly when I was promised. Thank you for such excellent service. R. Samler

  • 4/3/12

    Posted by: Curtis


    No Problems

  • #45 Replacement Water Panel

    Posted by: Allen


    Great price, service and delivery. Easy web purchase. Keep up the good work.

  • Service

    Posted by: Bill


    Arrived quickley and without damage!

  • Exact fit

    Posted by: svrobb


    Sometimes it just doesn't pay to purchase a after market product. If you want a perfect fit you need to come back to the company that makes your humidifier. And the Aprilaire filter fits perfect

  • Fast delivery, reasonable prices

    Posted by: Paul


    Site was easy to navigate. Delivery was very quick. Will order again.

  • #45 water panel

    Posted by: JLA


    Both the service and product are excellent.

  • My April Air Filter

    Posted by: Sharon Atkins


    This filter is much too difficult to install and to determine if it is actually working. I hope it works and that I don't break it installing the filter. Improvements are necessary on this product.

  • Shopping experience

    Posted by: Judith Ackerson


    We are happy with your product and service. Do you have tablets to put in the humidifier to retard the growth of mold? That has been recommended to us.

  • water panels

    Posted by: smitty


    follow the directions and the change out is easy. The price is a little high, but it's a specialty item soooo. So far, love the system - really has cut the winter static!

  • Satisfied

    Posted by: Ernie


    Good price, fast delivery. What more is there to say.

  • eStore Rating- Fantastic

    Posted by: John B.


    I simply ordered online and had the 2-pack water panels within 2 days. Quick and easy is a good combination.

  • Fast fast fast

    Posted by: Rob


    Shipped same day and received a day later. Can't ask for more than that.

  • excellent service

    Posted by: JCL


    I ordered a case of #45 water panel evaporator-2 pack. they were at my door in 2 days. Great job Aprilaire.

  • Aprilaire Water Panel

    Posted by: Phil in VA


    Ordering was easy, delivery was prompt and i part was easy to install. Very pleased with product and service.

  • Paid too much!

    Posted by: RC


    I bought 2 filters direct from Aprilaire via the company website. The next day I found the same filters being sold (brand new)on Amazon, for 35% less! Aprilaire should not charge its customers a premium for the privilage of shopping on its website! Buy at Amazon.

  • Part #45 Water Panel

    Posted by: Anonymous


    Excellent service from Aprilaire.

  • excellent service & shipping

    Posted by: robert & mary ellen rock


    thanks for great shipping and a good product

  • customer service

    Posted by: Paula


    I had the help of the old box to know what to order but besides that your web site is very good and customer service and notification very good also. I hate it when a company has a good site and changes it for what reason can only be guessed at. So good job to you!

  • Rating

    Posted by: Anonymous


    Delivered as promised.

  • very pleased

    Posted by: Anonymous


    Ordering was easy - very fast shipping and my panels arrived exactly as I ordered.

  • no problem

    Posted by: jaf


    have ordered these panels in the past from aprilaire.com..always satisfied..fine product...reasonable cost..enjoyed the free shipping..quite satisfied

  • very satisfied

    Posted by: J.Catera


    On line ordering was simple. Did not have to go shopping and search for it. Bought two packs and saved on delivery charges. Was great.

  • Outstanding service

    Posted by: Sarah C.


    I didn't know the part number, but the website is user friendly to find what parts belong to what models. Like I said it's easy to navigate, and my parts arrived very fast. I would recommend this company to anyone.

  • Water Panel #45

    Posted by: Greg Makarewicz


    Arrived 2 days after I ordered them in good shape.

  • Replacement Water Panel

    Posted by: V.W. in New York


    I recently placed order to Customer Service for replacement water panels. The service rep.was extremely nice and knowledgable about the replacement that I needed. It was shipped out the same day, and I received it within 3 days. I wish every company was as diligent as Aprilaire. Thankyou so much for all your help.

  • Excellant

    Posted by: Mrs Pat Wood


    Got exactly what I ordered. Fast delivery. Thank you will order again

  • #45 water panel

    Posted by: m. l. leymeister


    Instructions are good and panel works fine.

  • Part # 45 Water Panel Evaporator-2pack

    Posted by: JMc


    Third re-order. Easy Installation. Great Customer Service

  • home renter

    Posted by: Martha Sheffield


    Have not used the new water panel evaporators yet and will not until the winter. Had no problem with the order and delivery.

  • Works great

    Posted by: Not really Harry Homeowner


    These panels work great and are not too hard to install, even for those like me who are not very handy around the house.

  • #45 Water Panel

    Posted by: Wm. Feldbaumer


    Ordering was easy and shipment was prompt. Shipping and handling charge was outrages.

  • AOK

    Posted by: NF J's


    It's best to have the branded filter and know that it will work best. It's pretty easy to install - and you clean the unit at the same time.

  • Aprilaire Water Panels

    Posted by: Diane


    The product arrived in prompt time and in good condition. I found that turning down the water flow has helped with build up of minerals in the panel. Appreciated the free shipping offer.

  • Aprilaire

    Posted by: Bob of Forked River


    It is always a good experience shopping on line with your company. My panels came in 3 days! I will continue to shop through Aprilaire on line

  • Part #45 Water Panel Replacement

    Posted by: John Mitchell


    Second time for ordering the replacement water panel. Great service. If all on line ordering was as easy and as clear as Aprilaire's web site makes it, everyone would be ordering everything online, especially people who don't have stores conveniently located near their homes. Thanks.

  • Replacement water panels

    Posted by: Lyn


    Ordering was easy and shipment arrived right on time.

  • Humidifier filters

    Posted by: B Olivier


    Arrived on time and without damage. Second order made with Aprilaire

  • Can't get better

    Posted by: Tom


    I am totally happy how easy it was to order and the quality when I received it. Nothing was missing, broken or bent.

  • Part #45 Water Panel

    Posted by: Vicki


    Ordering was easy; arrived in great time. No complaints!

  • Works great

    Posted by: Steve


    Product was delivered fast, easy to install, works great. Why pay for a specialist to do it for you?

  • water panel

    Posted by: JL


    Great ordering experience. Product arrived timely and does what it's advertised to do

  • 2 PACK

    Posted by: HALINKPT@AOL.COM



  • reply

    Posted by: John McAuliffe mcauljf@verizon.net


    Strange you should e-mail just as I was changing the water panel. The order was receivd in good order. Good Service. One question -- does it mate which side of the panel faces front??

  • Humidifer replacement wicks

    Posted by: George M


    Ordered direct through aprilaire website. The new humidifier wicks are better than the old ones, plus shipping was free. Great price for two pack. Would order again.

  • Water Panel #45

    Posted by: Mom in Maryland


    Super fast shipping and worked like a charm; our house now has 42% humidity. Turned out the switch was broken on our unit and when we replaced the filter we found that out. Our house is now very comfortable in this cold weather.

  • Good Water Panels

    Posted by: Adrian


    They work like they should.

  • Exceptional Service

    Posted by: Dan


    I was really pleased with the site. Everything went without hitch. One suggestion I would have is to give a few other options beside FedEx for delivery.

  • excellent product

    Posted by: Carol Thompson


    Great product preforming a good service, No complaints since I started using the product 4 yrs. ago.

  • Order results

    Posted by: Anonymous


    Everything worked fine. Received what I ordered quickly and with no problems

  • It came... it worked

    Posted by: TH


    I ordered the part. The part showed up on time. Its currently working. Everyone wins.

  • Part#45 WaterPanel Evaporator

    Posted by: J. Fallon


    Easy ordering. Product received in expeditious manner. Completely satisfied.

  • Part #45 Water Panel

    Posted by: B. Herman


    I initially telephoned your company and spoke to a young man on May 5, 2010 after 3PM who advised me the only way to order this product was online. I then telephoned back at 3:50PM to advise Phyliss about encountering difficulty with the one distributor I called who only wanted to install via a "service call" and Phyliss offered to place the order for this product over the telephone. I commend Phyliss for her high level of customer service!