3M Ultra Allergen Reduction Deep Pleat 4" Filter, 2-pack for $39.99 Costco Members

Great price. Thanks for sharing.

Great price, I wish they would have 2"

Good deal. Didn't know they carried the 4" on website. Usually just order them off Amazon warehouse deals.

3M also offers a mail-in rebate [filtrete.com] for these filters, $5 but you can only submit one per household per year. The 2 pack at COstco only has one SKU therefore it counts as a single item for this rebate.

Direct link here:
https://multimedia.3m.com/mws/med...ar-pdf.pdf

There is another rebate for $5 when you buy 1, $8 when you buy 2, $12 when you buy 3 -- of filters labelled 800MPR or greater (which these are, at 1550 MPR). It too is usually an annual rebate but for some reason the one posted is only good for purchases July 1, 2020 to December 31, 2020. Costco has the $10 off instant savings a few times a year so if you need multiple packs in the year you can claim this second rebate in the second half of the year.

I have only used the standard "width" filters, would I need something else to use a deeper one like these? Tons of allergens in the house and sensitive kids.

The cheap filters do the job fine. These more expensive filters restrict the airflow and cause issues with your HVAC. The key is to buy cheap filters and replace monthly.

I've been using the Honeywell FC100A1037 20x25x4 (merv 11) my super high efficient new furnace because that's what it came with and was recommended.
How do these compare?

Quote from JoshA3151 : I've been using the Honeywell FC100A1037 20x25x4 (merv 11) my super high efficient new furnace because that's what it came with and was recommended. How do these compare?

I bought the following for my new high efficiency Carrier furnance from Amazon. Currently $12 each in pack of 6. Merv 11. I added small piece of styrofoam to keep it from moving since it is slightly smaller than Carrier branded filters. It is just under 20x25 in size as described.

https://www.amazon.com/gp/product...UTF8&psc=1

Quote from angryPapaBear : Great price, I wish they would have 2"

Better prices on the Glasfloss 1 inch and 2 inch filters from Amazon. I bought the 1" for a relative's furnace. Below are the 20x25x2 for $76.11 for a 12-pack. These appear to me to be high quality filters with stiff frame that do not easily bend or loose their shape like cheap ones.

https://www.amazon.com/20x25x2-Me...=hi&sr=1-7

My relative's furnace takes the following 1 inch size that is $61.61 for a 12-pack

https://www.amazon.com/gp/product...UTF8&psc=1

Quote from Brighton : I bought the following for my new high efficiency Carrier furnance from Amazon. Currently $12 each in pack of 6. Merv 11. I added small piece of styrofoam to keep it from moving since it is slightly smaller than Carrier branded filters. It is just under 20x25 in size as described. https://www.amazon.com/gp/product...UTF8&psc=1 [amazon.com]

I almost bought those actually, but was concerned about the "gap" that the reviews mentioned. I didn't spend $10k+ on my new furnace/AC setup to cheap out on filters that don't properly fit and allow unfiltered air into the system.

Quote from Brighton : Better prices on the Glasfloss 1 inch and 2 inch filters from Amazon. I bought the 1" for a relative's furnace. Below are the 20x25x2 for $76.11 for a 12-pack. These appear to me to be high quality filters with stiff frame that do not easily bend or loose their shape like cheap ones. https://www.amazon.com/20x25x2-Me...=hi&sr=1-7 My relative's furnace takes the following 1 inch size that is $61.61 for a 12-pack https://www.amazon.com/gp/product...UTF8&psc=1

I ended buying glassfloss last year.
but thanks for the research, repped

Quote from CalmTable947 : The cheap filters do the job fine. These more expensive filters restrict the airflow and cause issues with your HVAC. The key is to buy cheap filters and replace monthly.

This information is very much outdated. The newest filters have negligible changes in pressure drop between various ratings due to the increase in number of pleats as you go up. The only exception are those garbage fiberglass ones that no one should be installing, especially in a new furnace. There is no good reason to buy three cheap filters that don't filter as well over of one decent one.

https://www.iallergy.com/pages/co...te-filters

The 1500, 1900, and 2100 ultra filtration filters (MERV 12 & 13) actually pass air more efficiently than the cheap 300 (MERV 5). This is confirmed by the California Energy Commission: https://efiling.energy.ca.gov/Get...ntId=27716

Quote from J03 : This information is very much outdated. The newest filters have negligible changes in pressure drop between various ratings due to the increase in number of pleats as you go up. The only exception are those garbage fiberglass ones that no one should be installing, especially in a new furnace. There is no good reason to buy three cheap filters that don't filter as well over of one decent one. https://www.iallergy.com/pages/co...te-filters [iallergy.com] The 1500, 1900, and 2100 ultra filtration filters (MERV 12 & 13) actually pass air more efficiently than the cheap 300 (MERV 5). This is confirmed by the California Energy Commission: https://efiling.energy.ca.gov/Get...ntId=27716 [ca.gov]

Cheap filters work fine. Just change them monthly and you are good to go. No need to be paying these exorbitant prices when not needed.

Quote from JoshA3151 : I almost bought those actually, but was concerned about the "gap" that the reviews mentioned. I didn't spend $10k+ on my new furnace/AC setup to cheap out on filters that don't properly fit and allow unfiltered air into the system.

I understand your concern. I think the OEM filters for my furnace are $38 or more each from Carrier. I measured my furnace duct work where the filter should be pulled in due to airflow to make sure the slightly smaller filter would still cover properly. I added a length of cardboard under the cheaper filters to raise it up about 1/8 of an inch and a 1 inch piece of foam to get the filter pushed against the duct work in case it somehow was not pulled in from airflow.

I am saving $26 every time I change the filter. If I change it only once every 2 months it is a savings of $156 a year. The standard housing for my furnace would have taken just a 1 inch filter. I paid extra for 4 inch housing. If I had to pay $38 a filter I would probably use a 2 inch filter for about $6 and just change it more often or would have wished I stayed with the original, smaller filter compartment when I bought the furnace.

I had a free furnace check by the installation company about a year after the furnace was installed. They examined my cheap filter as part of the 90 minute to 2 hour checkup and said nothing about it as it was not dirty. I had installed a new clean one the week before.

Below is the OEM filter for $38.
https://www.amazon.com/Carrier-Br...940&sr=8-5