Model differences

Honeywell Air Genius: compare room size, controls and filter care

The Honeywell Air Genius towers share a washable ifD filter, but they do not share one room rating, control panel or odor-filter routine. Start with the room's required 4.8-ACH area; then compare the specific manual controls and maintenance you will actually use.

Compare the repeated-cleaning areas

Honeywell's U.S. model pages list the Air Genius 4 Compact HFD280 at 150 square feet, the Air Genius 3 HFD300 at 225, the Air Genius 4 HFD310 at 250, the Air Genius 5 HFD320 at 250 and the Air Genius 6 HFD360 at 260 square feet at up to 4.8 air changes per hour. The product pages tie these figures to smoke-CADR testing at the highest setting and caution that real circulation varies; they do not guarantee all room air passes through the filter. These ratings clear the 140-square-foot compact threshold, but none reaches the 358-square-foot medium tier used here.

Do not substitute a one-change marketing headline for the repeated-cleaning figure. A room with open doorways, high ceilings or a layout that blocks the outlet can be harder to clean than a closed room of the same floor area. The tower still needs an unobstructed intake and outlet, and the fan must run at a speed you find usable. HFD280's manual specifically asks for six inches from walls or furniture; the body size of any model is not a clearance allowance.

Lifecycle matters too. Honeywell Store now marks the exact HFD280B and HFD360B listings discontinued. They remain useful if you already own one or are comparing a used unit, but they are earlier-model references rather than default current-buy recommendations. The HFD300, HFD310 and HFD320 are currently listed by Honeywell Store as available; status can change.

Choose settings, not just a model number

The HFD300 has three local levels—Max, General and Sleep—and oscillation. The HFD310 adds a fourth named level, Pollen, with General, Sleep and Max, plus an auto-off timer and base accent light. The HFD320 manual lists five levels: Max, Pollen, General, Quiet Clean and Sleep; it also has a longer timer and a filter-status bar. These are direct settings, not particle-sensing Auto. A maintenance light or timer bar should not be mistaken for a room air-quality reading.

HFD360 is the sensor outlier: it has an Auto routine that responds to VOCs and a green/amber/red status cue. That is not a PM2.5 particle sensor or a numeric particle reading. Its older manual describes Bluetooth and an app, but Honeywell's current page says the unit is no longer connected; the current practical control is local. Because this exact model is discontinued, its VOC feature may still matter to an owner, but it is not a current app-enabled replacement choice.

For an exact HFD320 listing, use the manual's names rather than retailer shorthand. Honeywell Store separately lists the HFD323TGTV2, links the HFD320-series manual and publishes the same room area, but the page's copy describes a different set of control selections. That HFD323-specific control mapping remains uncertain; do not transfer its labels to the HFD320 or assume that a similar image proves the settings are identical.

One pre-filter slot changes the upkeep

HFD280, HFD300, HFD310 and HFD320 use a permanent washable ifD particle filter and give a choice of pre-filters: the washable mesh/foam piece or the optional K odor/VOC pre-filter. The manual says to install only one at a time. Keep the washable piece if avoiding a recurring cartridge is more important than the odor-media option; choose K only if its described general household-odor use is relevant and you accept replacement at about three months. K is not washable and is not documented as a pet-specific odor filter. HFD360's supplied odor/VOC arrangement uses K as its standard pre-filter, adding that recurring task to the washable ifD routine.

Plan to inspect and clean washable media about every three months, or sooner when dust, pets or smoke load them. Turn the device off and unplug before opening it, follow the model manual's cleaning and wait steps, and let the ifD filter dry completely before returning it. The filter indicator is only a maintenance reminder: inspect the filter even if the light has not yet come on. Honeywell describes an electronic-ionizer stage in the family manuals; check the exact model manual if that design or the manufacturer's ozone-compliance statement is important to you.

Which one belongs on your shortlist?

• HFD280 Compact: compare if you own one or need its 150-square-foot reference; the exact model is discontinued and its panel lights cannot be fully switched off.
• HFD300: consider the current 225-square-foot model if three manual levels are enough and you do not need a timer.
• HFD310: compare the current 250-square-foot option for four direct levels, Sleep, oscillation, timer and dimmable base light.
• HFD320: choose only if five manual levels and its longer timer/status bar add value at the same 250-square-foot rating; it is not an automatic sensor model.
• HFD360: keep as an earlier owner/used-model reference if VOC Auto matters; its exact model is discontinued and its old app connection is no longer supported.

If the required area exceeds 250 square feet at the stated repeated-cleaning rate, the current HFD310 and HFD320 do not solve that need. Move to a larger model with a comparable area basis rather than relying on an unqualified title, quiet-mode assumption or an old discontinued reference. The product images here are manufacturer renders, not room-placement photographs.

Sources: HFD280 product page, HFD300 product page, HFD310 exact listing, HFD30X/31X/32X owner’s manual, HFD323 listing, HFD360 product page, and Honeywell Air Genius support page. These are manufacturer statements, not independent laboratory tests.