ASHRAE Journal - September 2019 - 21

TECHNICAL FEATURE

consumers can absorb, in part because portable units
are not covered by ASHRAE Standard 52.2, the standard
that establishes performance criteria for MERV ratings.
Consequently, for portable unit performance ratings,
the EPA guidance refers to the Association of Home
Appliance Manufacturers (AHAM), an organization that
offers performance ratings and certification for particle
removal by portable air cleaners.
AHAM testing measures the "clean air delivery rate"
(CADR) of the device. The CADR is the amount of air
(in cfm) that has been cleaned of particles in three size
ranges. The ranges are described by names that consumers can relate to, namely: "smoke", "dust" and "pollen."
AHAM defines these as 0.09 to1.0 µm for smoke, 0.5 to
3 µm for dust, and 5 to 11 µm for pollen.
Further, the CADR also estimates the filtration effectiveness of the device-the reduction in particle concentrations in the occupied space, based on the maximum
recommended floor area for the rated unit. Rated units
are expected to remove 80% of the airborne small particles (0.09 to 1.0 µm) over an hour, above and beyond

the number of particles that would naturally settle out.
Rated removal is also based on the assumptions that
the ceiling height is no higher than 8 ft (2.4 m) and that
the space exchanges less than one air change per hour
with other spaces. The EPA guidance to consumers notes
that units with larger CADR ratings are better, and that
if ceiling heights are greater than 8 ft (2.4 m) (such as
spaces with cathedral ceilings) a consumer might consider using a larger unit or multiple units to achieve 80%
reduction in particle concentration.
Note the most important but unstated assumption is
that the unit is running continuously when the space in question is occupied. Short runtimes limit the effectiveness
of portable air cleaners, just as they limit the filtration
effectiveness of central systems. And with portable air
cleaners, operating noise can be an issue. The noise
levels at which a given unit's CADR was achieved are
not currently described on the AHAM-verified label. It
would be helpful if consumer packaging displayed the
sound levels at which the CADR rating was achieved, to
provide a basis for better-informed consumer choices.

Grow your business with the
power of a 100-year-old brand
Panasonic HVAC solutions provide everything
you need to cool, heat and save energy. Installing
Panasonic means you're partnering with a trusted
brand renowned for well-designed solutions,
innovative technologies and unparalleled service
and support.

Residential Comfort
EXTERIOS XE ductless systems do more than
just heat and cool a home. They detect room
occupancy as well as activity and automatically
adjust temperatures to ideal comfort levels.

Building Design Flexibility
ECOi VRF systems give contractors, engineers
and architects a modular HVAC solution that
can grow with any building while lowering
operating costs.
Want to take the next step? Call us at
800-851-1235 and let's talk about growing your
business with Panasonic.

us.panasonic.com/hvac

S E P T E M B E R 2 0 19

ashrae.org

ASHRAE JOURNAL

21


http://us.panasonic.com/hvac http://www.ashrae.org

ASHRAE Journal - September 2019

Table of Contents for the Digital Edition of ASHRAE Journal - September 2019

Contents
ASHRAE Journal - September 2019 - Intro
ASHRAE Journal - September 2019 - Cover1
ASHRAE Journal - September 2019 - Cover2
ASHRAE Journal - September 2019 - 1
ASHRAE Journal - September 2019 - Contents
ASHRAE Journal - September 2019 - 3
ASHRAE Journal - September 2019 - 4
ASHRAE Journal - September 2019 - 5
ASHRAE Journal - September 2019 - 6
ASHRAE Journal - September 2019 - 7
ASHRAE Journal - September 2019 - 8
ASHRAE Journal - September 2019 - 9
ASHRAE Journal - September 2019 - 10
ASHRAE Journal - September 2019 - 11
ASHRAE Journal - September 2019 - 12
ASHRAE Journal - September 2019 - 13
ASHRAE Journal - September 2019 - 14
ASHRAE Journal - September 2019 - 15
ASHRAE Journal - September 2019 - 16
ASHRAE Journal - September 2019 - 17
ASHRAE Journal - September 2019 - 18
ASHRAE Journal - September 2019 - 19
ASHRAE Journal - September 2019 - 20
ASHRAE Journal - September 2019 - 21
ASHRAE Journal - September 2019 - 22
ASHRAE Journal - September 2019 - 23
ASHRAE Journal - September 2019 - 24
ASHRAE Journal - September 2019 - 25
ASHRAE Journal - September 2019 - 26
ASHRAE Journal - September 2019 - 27
ASHRAE Journal - September 2019 - 28
ASHRAE Journal - September 2019 - 29
ASHRAE Journal - September 2019 - 30
ASHRAE Journal - September 2019 - 31
ASHRAE Journal - September 2019 - 32
ASHRAE Journal - September 2019 - 33
ASHRAE Journal - September 2019 - 34
ASHRAE Journal - September 2019 - 35
ASHRAE Journal - September 2019 - 36
ASHRAE Journal - September 2019 - 37
ASHRAE Journal - September 2019 - 38
ASHRAE Journal - September 2019 - 39
ASHRAE Journal - September 2019 - 40
ASHRAE Journal - September 2019 - 41
ASHRAE Journal - September 2019 - 42
ASHRAE Journal - September 2019 - 43
ASHRAE Journal - September 2019 - 44
ASHRAE Journal - September 2019 - 45
ASHRAE Journal - September 2019 - 46
ASHRAE Journal - September 2019 - 47
ASHRAE Journal - September 2019 - 48
ASHRAE Journal - September 2019 - 49
ASHRAE Journal - September 2019 - 50
ASHRAE Journal - September 2019 - 51
ASHRAE Journal - September 2019 - 52
ASHRAE Journal - September 2019 - 53
ASHRAE Journal - September 2019 - 54
ASHRAE Journal - September 2019 - 55
ASHRAE Journal - September 2019 - 56
ASHRAE Journal - September 2019 - 57
ASHRAE Journal - September 2019 - 58
ASHRAE Journal - September 2019 - 59
ASHRAE Journal - September 2019 - 60
ASHRAE Journal - September 2019 - 61
ASHRAE Journal - September 2019 - 62
ASHRAE Journal - September 2019 - 63
ASHRAE Journal - September 2019 - 64
ASHRAE Journal - September 2019 - 65
ASHRAE Journal - September 2019 - 66
ASHRAE Journal - September 2019 - 67
ASHRAE Journal - September 2019 - 68
ASHRAE Journal - September 2019 - 69
ASHRAE Journal - September 2019 - 70
ASHRAE Journal - September 2019 - 71
ASHRAE Journal - September 2019 - 72
ASHRAE Journal - September 2019 - 73
ASHRAE Journal - September 2019 - 74
ASHRAE Journal - September 2019 - 75
ASHRAE Journal - September 2019 - 76
ASHRAE Journal - September 2019 - 77
ASHRAE Journal - September 2019 - 78
ASHRAE Journal - September 2019 - 79
ASHRAE Journal - September 2019 - 80
ASHRAE Journal - September 2019 - 81
ASHRAE Journal - September 2019 - 82
ASHRAE Journal - September 2019 - 83
ASHRAE Journal - September 2019 - 84
ASHRAE Journal - September 2019 - 85
ASHRAE Journal - September 2019 - 86
ASHRAE Journal - September 2019 - 87
ASHRAE Journal - September 2019 - 88
ASHRAE Journal - September 2019 - Cover3
ASHRAE Journal - September 2019 - Cover4
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ILKVNM
https://www.nxtbook.com/nxtbooks/ashrae/ashraemexico_2021
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_OPDJKD
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_VJKSRY
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SDHUTC
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JPPKRR
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SDLTTH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_CKLLES
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SLDOX
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_HJETUK
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_OLUHGE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2020october
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2020october_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ZERDGH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_QVMNEO
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_RTPOKE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_BBATRE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_STUBMW
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_TPEMPE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JNMKDS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_FBTTPA
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_WQMMNE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_TVBRYN
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_showguide2020
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_KTUZMA
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ABEDGD
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201910
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201909
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2019septmeber_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2019september
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201908
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201907
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201906
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201905
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201904
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2019april
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201903
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2019march
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201902
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201901
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_showguide2019
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2018december
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2018november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2018fall_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2018fall
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2018october
https://www.nxtbook.com/nxtbooks/ashrae/ashraemexico_2018
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201810
https://www.nxtbook.com/nxtbooks/ashrae/ashraeinsights_201806
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201805
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201804
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201803
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201712
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201711
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201710
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2017fall_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2017fall
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201709
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201705
https://www.nxtbook.com/nxtbooks/ashrae/ashrae_meetinginsert_201610
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2016fall_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2016fall
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_acrexindia
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2015summer_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2015summer
https://www.nxtbook.com/nxtbooks/amca/2014summer2
https://www.nxtbook.com/nxtbooks/amca/2014summer
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_acma_2014summer
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201311
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201309
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_acmasupp_2013fall
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201305
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201303
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2013winter
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201211
https://www.nxtbook.com/nxtbooks/ashrae/achr_expo_mexico2012
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201209
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201208_v3
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201208_v2
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2012summer
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201205
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201203
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2012winter
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201111_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201109_v2
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2011summer
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201105
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201103
https://www.nxtbookmedia.com