Medify MA-112

“So you need an air purifier for each room/area. Open plan areas can benefit from multiple air purifiers. As you have vaulted ceilings, we would need length x width x height for room volume. This is a little more complicated, as you have to break up the airspace into imaginary geometric figures. Hunker has a guide to this: [https://www.hunker.com/13402620/how-to-measure-a-vaulted-ceiling/](https://www.hunker.com/13402620/how-to-measure-a-vaulted-ceiling/) I would generally recommend against placing air purifiers in bathrooms. Even mechanical filtration (such as HEPA media) does not fare well in high humidity environments. The most important metric of a particulates air purifier is Clean Air Delivery Rate (CADR). [For wildfire smoke treatment](https://ahamverifide.org/ahams-air-filtration-standards/), the **Smoke CADR should** ***equal*** **your room's area, assuming an 8 ft. high ceiling**. Obviously your ceilings are higher. For a hypothetical cuboidal room with higher ceilings, the calculations would be: * Room area: 300 sq. ft. and ceiling height: 12 ft. * 300 sq. ft. × 12 ft. = 3,600 cubic feet * 3,600 cubic feet ÷ 8 ft. = 450 sq. ft. * 450 sq. ft. should be new air purifier "equivalent" for the Smoke CADR of 450 CFM # Sound Levels According to a *Pediatrics* article, "50 A-weighted dB \[...\] is the current recommended noise limit for infants in hospital nurseries \[in the USA\]".^(1)  Toddlers and older children are also susceptible to louder sounds, but I am unaware of recommend A-weighted decibels limits according to exposure times (e.g., number of hours per day the sound or noise is sustained). There's a second Pediatrics article that provides broad advice and footnotes to additional sources of research or guidelines.^(2) Keep any purifiers centrally located within the room, but at a distance from the newborn if possible. To add the sound levels of multiple purifiers in decibels (dB), see this [Decibel Calculator](https://noisetools.net/decibelcalculator) from NoiseTools.net. # Particulates Air Purifiers The [Smart Air Blast MKII](https://www.smarterhepa.com/products/smart-air-blast) is the quietest high performing air purifier, with the top speed setting at 43 dB. Its Smoke CADR is not given however; you may wish to ask Smart Air directly. Dust CADR is 559 CFM. The [Coway Airmega ProX](https://cowaymega.com/products/airmega-prox) is high performing and also quiet, with its top speed setting at 46 dB(A). Smoke CADR is 568 CFM. **For other rooms:** We generally recommend **Coway** brand air purifiers for their higher quality. If you think the sound levels may be too great on the highest setting, you can place multiple units in each room and run them on lower settings. However, most air purifier brands do not list CADRs for the lower settings. You would need to ask for these figures (especially Smoke CADR). If you don't mind a *loud* air purifier in an unoccupied space, see the [Medify Air MA-112](https://medify”