4” WES Universal Furnace Filter
Clean air, all the time
Merv 8. Compatible with all furnaces. Available in 4 sizes.
How do I know which size to choose?
Take a look at your current filter. There should be writing on the side that looks something like this: 16 X 20 X 4
Still not sure?
Give us a call during our business hours and we would love to help: 800-398-4663
What is MERV?
MERV stands for Minimum Efficiency Reporting Value. Your filters MERV Rating is a good way to help judge the effectiveness of the filter. The higher the MERV, the more effective.
When will my filter ship?
Your filter will ship within 5 business days.
Online Store Filter Return Policy
We stand behind everything we sell. If you are not satisfied with your Washington Energy Services online store filter purchase, you can return it for a replacement or refund within 30 days of purchase.
Washington Energy does not cover used filters or damage caused by improper use or accidents.
If your item has a manufacturing defect in its materials or workmanship, you can return it at any time.
Returning or Exchanging Items
The most common reason for an exchange is the wrong filter size.
You can return or exchange purchases by mail or at our Lynnwood retail location.
You must have a proof of purchase (online store receipt or member purchase history) for all returns and exchanges.
Returns and Exchanges by Mail
We recommend that you ship your package with a carrier that can provide tracking and insurance. Washington Energy Services is not responsible for packages lost in transit.
To return or exchange an order by mail:
• Include a copy of your proof of purchase.
• Ship your package with a carrier that can provide tracking and insurance.
For USPS, use this address:
Washington Energy Services
3909 196th St SW
Lynnwood, WA 98036
You will be refunded on the original credit card for purchases made on our online store within 30 days from the date of the refund request. This will show on your next statement, depending on the issuing bank and/or billing cycle.
If after 30 days or if you are using a different purchase method other than a credit card, you will receive a check by mail.
You will be mailed your refund by check within 3-4 weeks from the refund request date. If you would prefer to have the funds returned on the original credit card that was used to make the purchase, it must be requested within 30 days of the original order. This will show on your next statement, depending on the issuing bank and/or billing cycle.
Return Shipping Refunds
For returns or exchanges due to manufacturers defect, Washington Energy Services will refund the return cost of shipping. If you are returning or exchanging a product by mail due to an improper size, the customer is responsible for the return shipping expense.
Join our Filter Program
Get a new filter when you're supposed to - automatically - and save money, too. With our filter program, filters are automatically shipped to your home when it's time to change them out. No need to mark the calendar, search for a filter and go out to buy one - we'll send it to you right on time (and with free shipping!). Just one less thing to remember.Find Out More
16 x 20 x 4, 16 x 25 x 4, 20 x 20 x 4, 20 x 25 x 4