WaterFurnace Geothermal 28x24x2 MERV 10 Airguard Air Filter - 4 Pack
Product Details
This Airguard filter is manufactured for WaterFurnace and is considered by WaterFurnace to be the OEM replacement MERV 10 air filter for all their Geothermal Comfort Systems that use a 24 x 28 x 2 pre-filter. The MERV11 version has been discontinued and is now only offered as a MERV10.
The replacement filters used with WaterFurnace units that use a 24 x 28 x 2 pre-filter must use a filter that is a full 24" x 28". If you use a smaller filter such as many of the 23 1/2" x 27 3/4" filters sold by other manufacturers, your filter will not seal properly and you could get unfiltered air leaking around the edge of the filter, this is called bypass. The 59P509-04 MERV 11 air filter is approximately 24" x 28" x 1 3/4" and is the size recommended by WaterFurnace for a proper fit.
Common WaterFurnace Geothermal Heat Pump Models that use this pre-filter:
Envision Series:
Single Speed Vertical Units: NDV022, NDV030
Dual Capacity Vertical Units: NDV026
Legend Series:
Vertical Units: SV036
Premier Series:
Vertical Units: P019, P022, P028, P034
This filter is made of 100% synthetic fibers that are needled together and then electrostatically charged. The needled fibers create a dense mat that produces a MERV 11 rating and higher mechanical efficiency at a lower air resistance than other pleated filters. For more information on the construction of the 59P509-04 replacement air filter, please review the Airguard PowerGuard Air Filter Specifications.
WaterFurnace Premier Series units have an air filter rack that can be set for 1" or 2" when the units are installed. In most situations, you will not be able to change your units filter rack size without altering your ductwork, so please make sure your units filter rack is set for 2" filters. If your unit's filter rack is set for 1" filters, please get in touch with us for a quote on the exact filter you need.
The manufacturer suggested replacement interval is 4 to 6 months, depending upon conditions and lifestyle.
For instructions on changing your furnace's air filter, please refer to your unit's Owner's Manual.
This package ships with 4 filters.Returns & Exchanges
We want every order to go smoothly, and if something is not right we want to make it right. At the same time, for the health and safety of everyone — our team, other customers, and the facilities these products are used in — we cannot resell opened or used filtration and air quality products. Our policy below is built around that reality. If you have any questions about a product before ordering, please reach out — we would rather help you get the right thing the first time than deal with a return after the fact.
Eligibility
Opened or used items are not eligible for return or refund under any circumstances. Products designated as Special Order, Clearance, Discontinued, or Final Sale are also not eligible for return or exchange. All other returns require items to be unused, in new condition, and in original packaging with all accessories and documentation included.
30-Day Return Policy
Unopened, unused items may be returned within 30 days of delivery, subject to a restocking fee of at least 25% of the purchase price. Original shipping costs are not refunded. Return shipping is the buyer's responsibility. A Return Material Authorization (RMA) number is required before shipping any return — contact us first at Help@HEPAFilterSales.com to receive return instructions. Returns sent without an RMA may be refused.
Refunds are processed within 10 business days of receiving and inspecting the returned item. You will be notified by email when your refund has been issued.
Exchanges — Standard Restocking Charge Waived
Exchanges for unopened, unused items are not subject to a restocking fee. Contact us at Help@HEPAFilterSales.com before returning any item to arrange an exchange and receive expert advice on the correct solution.
Order Cancellations
Contact us immediately if you need to cancel an order. Not all orders can be cancelled once placed — freight and special-order items in particular may ship before a cancellation can be processed.
Damaged or Incorrect Items
If your order arrives damaged, note the damage with the delivery carrier at time of delivery, photograph the damage, and email us within 48 hours of delivery at Help@HEPAFilterSales.com. We will arrange return shipping and send a replacement at no additional cost to you.
If you receive an incorrect item, email us your order number and a description of the issue. We will arrange return shipping and send the correct item at no cost to you.
Defective Items
Suspected product defects and performance issues are warranty matters handled directly by the manufacturer — they are not eligible for return or return shipping reimbursement from HEPA Filter Sales, LLC. Contact us and we will provide manufacturer contact information to assist with a warranty claim.
For More Information, please take a moment to review our governing policies:
Returns & Refunds Policy
Shipping Policy
Purchase Options & Subscription Policy