Does the area (1256 sqft) need to be one open area or can be split into multiple rooms with doors open ?

Well first off no real air purifier expert would tell you to use the 1256 sq.ft. You want a minimum of 5 air changes per hour (ACH) and 1256 only provides about 2. If you are truly looking for the benefits of air purification then you should be looking at 500-700 sq.ft and no more. With that said, you lose efficiency if it has to go to multiple rooms and thus less ACH. Unless you have an industrial Air purifier built into your HVAC system at your house you should think about limiting one air purifier per room (with the appropriate amount of power to handle it).

I'm getting a shipping error for California. Why is there a restriction to ship to California? It doesn't go over the dimension or weight max.

California bans electrostatic air filters because they produce unsafe amounts of ozone. Ozone damages your lungs. This also might be an Amazon problem, where they take reviews for similar products and stick them all together. I'm not sure the Airmega 400 has an electrostatic system in it. I don't see the no shipping alert on its Amazon listing (I live in California) but I see it on Healthmate HM-400 listing. The Wirecutter did a whole article and missed the electrostatic filter, so thanks CA. Electrostatic filters are very effective at removing particles but they produce ozone. If you're tired of smelling chicken poop, moving from a chicken ranch to an oil refinery would work, but.....

Does this work well to remove pet odors? It is so hard to hard to find any straight forward answers about odor removal on any of these higher end unit

I love it. I have a very sensitive nose and breathing. Works great for pet odors! I need one for the other side of the house. Worth the investment. I've tried some of the other $200-$300 purifiers

Will this work for oil painters - i need it to help with the removal of vocs such as turpentine and mineral spirits?

NOT good at all. I wish I could say otherwise since I own this product. I have 3 different instruments that measure VOCs. DO NOT depend on this product for VOC removal. I bought the Conway and the VOC testing instruments because I am a victim of VOC poisoning in my living space. After zeroing the testing instruments and getting baseline VOC measurements, the Conway did nothing to reduce them - even at the highest fan setting after 24 hours. I still love the Conway though as it does a SPECTACULAR job at reducing a full range of microparticulate matter.

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🌬️ Breathe Big, Live Clean — The Ultimate Air Upgrade for Your Space

NEXT LEVEL FILTRATION - Dual XL washable pre-filters plus True HEPA capture 99.999% of particles down to 0.01 microns.
SMART AUTO ECO MODES - Automatically adjusts fan speed or powers down to save energy when air is clean.
REAL TIME AIR QUALITY INSIGHTS - Stay informed with PM1.0 AQI monitoring and filter replacement alerts for peak performance.
EFFORTLESS MOBILITY LONGEVITY - Smooth-rolling wheels and a 5-year warranty keep your air fresh and your investment secure.
MASSIVE COVERAGE FOR LARGE SPACES - Purifies entire homes or offices up to 4,253 ft² with powerful binary motors.

The Coway Airmega ProX is a premium air purifier designed for extra-large rooms up to 4,253 ft². Featuring dual True HEPA and activated carbon filters, it removes 99.999% of ultra-fine particles and VOCs. Its smart auto and eco modes optimize air quality and energy use, while real-time PM1.0 AQI monitoring and filter indicators keep maintenance hassle-free. Equipped with wheels and backed by a 5-year warranty, it’s the perfect blend of power, intelligence, and convenience for modern living.

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Brand	Coway
Model Number	AP-3522F
Colour	Mocha Beige
Product Dimensions	61.72 x 48.01 x 92.96 cm; 23.13 kg
Power / Wattage	65 watts
Auto Shutoff	Yes
Noise Level	55 Decibels
Special Features	Air Quality Indicator, Auto Mode, Dual Purification, Eco Mode, Filter Replacement Indicator
Item Weight	23.1 kg

COWAY Air Purifiers for Large Room Whole Home Up to 4,253ft², 2 Sets of XL Washable Pre-Filters and True HEPA Filters for Dual Purification, PM1.0 AQI, Turbo Mode, Timer, Wheels, 5yr Warranty, ProX(B)

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