Instruction: Answer the given question using the supporting document.

Input:
Question: My current (original) filter is a Model HCF20-16.  What is the difference between it and this HCC20-28?
Document: This is not a MERV 16 filter as it clearly states it is just 1" thick. The original MERV 16 filter is 5" thick, using a carbon coating and therfore have a blck color. List price is $150.
Filter received four days after order. Shipping box and filter cartridge in perfect condition. Very easy to install. I have changed the filter annually since the new Lennox AC unit was installed and noticed a big difference using MERV 16 filter cartridges compared to the filters on my older AC unit. Now, with this charcoal-impregnated upgrade (same price as old design cartridge) I expect even more results and will come back and add to this review after I have tried the unit for a few months.
The filter came in a nicely fit box. It was easy to install it (just slide the old one out and slide the new one in). The size is perfect for HCC20-28. The price is 30% lower than the quote from the AC company I used for maintenance.
Product worked very well. Seen less small particle dust than with the original that came with the unit. There was a small damage to the edge of the filter when received but did not harm the function of the item.
What a difference this charcoal filter has made in my cleaner house. My cleaning lady asked me if I cleaned in between her visits! There is NO dust, and house smells fresher.
This filter arrived early and was in excellent shape. The filter is great for anyone with allergies. We have noticed a big difference in the house. I would highly recommend this filter.
Had this for a while now and I still see tons of particles in the air when the sun is shining in the window. I haven't noticed a difference in the air quality. I guess my expectations were too high. Kind of regretting spending $100 on an air filter. Next time I will just go back to the $25 one I usually buy.
Ok so comapred with standard filters these are expensive but from the first few months of use the carbon has seemed to make a difference, especially to my wife's asthma. No scientific testing done just estimation.
Had my air ducts cleaned after 32 years. They were a little dusty. Put in this Merv 16 filter in by Air Bear air cleaner. I had to but on foam gasket tape. The filter works great. Well worth the money.
Anyway, it took about 1 week for the smell to start to fade, or we became used to it. Spouse says it smells like a bakery.Otherwise, filter seems to work fine. Merv 16 should be better than the ~Merv 13 3M filters we were using.
Answer: Phil - HCC20-28 is the model number of the filter chassis and HCF20-16 the model number of the filter. Hope this helps.Alan