Abatement Technologies H8520 / H8520XLT Bag Filter for H4500 H4500IV - 4 Pack

Free Shipping on Orders Over $3,500

Orders over $3,500 ship free to the continental United States. For orders under $3,500, available shipping options and rates are calculated at checkout. No hidden fees.

In Stock & Ships Fast

Most items are in stock and ship the same business day when ordered by 2:00 PM Eastern, Monday through Saturday. You will receive tracking information by email within 24 hours of shipment.

Freight Shipments

Large equipment ships via freight carrier. Freight rates are calculated at checkout — we work to keep those rates competitive. If you are not satisfied with the rate shown, contact us before ordering for a to-the-penny quote. Freight delivery times vary by location.

Hawaii, Alaska & US Territories

We ship to Hawaii, Alaska, and US territories. Shipping options are available at checkout, though rates to these destinations are higher than continental US, an are ineligible for free shipping. Contact us before ordering if you'd like a quote.

International Orders

International shipping options, including prepaid duties and taxes where available, are shown at checkout.

Abatement Advantage — Volume Pricing

Ordering 3 or more units? Contact us for Abatement Advantage bulk pricing before placing your order.

Sales Tax

We collect sales tax only on orders shipped to Pennsylvania, where HEPA Filter Sales, LLC has nexus. Buyers in all other states pay $0 in State Sales Tax on orders placed Directly through our online store. The applicable rate is calculated automatically at checkout based on your ship-to ZIP code.

Tax-exempt buyers — including resellers, government entities, and 501(c)(3) nonprofits — Please submit a valid resale or exemption certificate before placing an order if applicable. Email your certificate, tax ID, and issuing state to Help@HEPAFilterSales.com. Tax paid on completed orders is not refundable — exemption must be established in advance.

Manufacturer's Warranty — Abatement Technologies

Abatement Technologies products are sold with the manufacturer's warranty. All warranty claims are handled directly by Abatement Technologies — HEPA Filter Sales, LLC does not administer or extend manufacturer warranties. Contact us if you need assistance reaching the manufacturer's warranty or support team.

Use of non-OEM replacement filters or parts voids the manufacturer warranty and all performance claims on Abatement Technologies equipment.

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 (compared to what was ordered), 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