Original Post
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Edited January 5, 2022
at 01:31 PM
by
Home Depot [homedepot.com] is having another sale on the 12 pack Arm & Hammer Odor Allergen and Pet Dander Control AC & Furnace Filter for $49.50 on majority of sizes. Click link for all sizes. The 12x20x1 is the cheapest at $44.50
This matches the price of the previous front page deal a couple of months ago.
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While HVAC techs typically recommend against MERV 8+, there "is a mountain of owner testimony that MERV 11, 12, and even 13 filters have worked just fine in their systems for years. As well, an often-cited comprehensive independent test of MERV 8 to 13 filters' effects on HVAC airflow and energy consumption (a proxy for how hard the equipment is working) concluded that even "if no accommodations are made for the greater pressure drop of high-MERV filters, air flow and energy penalties are not likely to be severe—at least, not until the filter is loaded with dirt."
Thus manufactures and techs are probably more on the cautious side to be extra sure. Again, don't let it get loaded with dirt before changing.
CR: https://www.consumerrep
Wire cutter: https://www.google.com/amp/s/www....d-buy/amp/
Independent study: http://www.homeenergy.
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Simple answer is these are 10x the filter as the generic hdx brand
Apparently too little airflow by these better quality filters can cause damage to your unit. HVAC techs don't recommend them. MERV 8 might not be too bad as I think it is the middle of the road.
Your incorrect, I'm in CA as well and you only get taxed on the actual sale price.
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