Question 1

Is it normal for there to be a cracking/popping noise after installing a new filter?  This is the 2nd one I’ve replaced and never heard the noise befo

Accepted Answer

I had the same issue and contacted RayAir about it. They replied that this sound is due to static discharges between the carbon middle layer and the metal screen frame. It is usually caused by moisture or debris that is bridging the carbon to the metal screen. In my situation the sounds stopped after about an hour, apparently the moisture or debris had dissipated. RayAir said this is normally what happens for those who report sounds like that. They also supplied a list of mitigation techniques if you wish to more directly intervene in the situation. I have to compliment them on their quick professional response to my concerns.

1. Remove replacement pad and use dust brush to clean off filter frame screen. (Do Not Use Water) 
2. Ensure replacement pads are not damp or have any water residue on them.
3. When installing replacement pad, insure to lay the replacement pad on-top of the powerhead probe and close the filter frame. 
4. If popping noise still exist, note where the popping noise is coming from. Remove replacement pad and rotate 180 degrees, then re-install.

Question 2

what is the difference between yellow and white furnace filters?

Accepted Answer

I honestly don't know if there is any difference. I only had the yellow, but I don't even use those since I installed a new furnace.

Question 3

Are these the retrograde version or the newer version with the narrower strip?

Accepted Answer

I don't know.  They look like the ones that I got when the furnace was installed in Feb 2015.

Question 4

My box says "230-7lp-2025nh" on the first line and "lpnh-fiedg-42025" on the second line of the sticker.  are these the same thing?

Accepted Answer

Charles, This listing is for compatible MicroPower Guard Replacement Air Filter Pads. Theses filter pads are designed for the 20x25 MicroPower Guard Air Cleaner systems. If you have a MicroPower Guard Air Cleaner with a filter frame size of 20x25, this is the correct filter replacement. There are a total of three replacement filters pads per order. Thank You, Ray Air Supply

Brand Name	RAYAIR SUPPLY
Model Info	2025MPG
Item Weight	12.8 ounces
Package Dimensions	14 x 12 x 4 inches
Item model number	2025MPG
Is Discontinued By Manufacturer	No
Part Number	2025MPG
Special Features	For Filter Size 20x25x1
Color	Yellow
Compatible Device	Air Cleaner
Material Type	Fiberglass
Batteries Included?	No
Batteries Required?	No

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RAYAIR SUPPLY 20x25 MicroPower Guard Air Cleaner Replacement Filter Pads (3 Pack) Yellow

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