ASHRAE Journal - April 2012 - 38
Air Intake
Intake Grid and Blinds
Photo 9: Inside the intake grid and blinds (left). The hallway space is large enough to reduce the air velocity significantly, preventing snow from being blown into the air intake (right).
Photo 10: Combined business and apartment building experiencing water leakage problems from the roof, where investigations revealed that some of the leakage water was caused by snow and water inlet through the fresh air ventilation intakes.
Not Watertight
Photo 11: Apartment building air intake with no shielding. experiencing problems with snow and rain inlet. An attempt to solve the problem with snow and rain inlet (entrainment) was done by placing outside shielding (black screen, Photo 6) in front of one of the intakes, but this ad hoc solution has been shown not to work. Note that there is no shielding from the top or sides, which would have reduced the snow and rain inlet substantially. Inside the intake grid and blinds (louvers) as shown in Photo 7, the space is too small to significantly reduce the air velocity, and large amounts of snow are blown into the air intake. One might ask: why were these rooms inside the air intakes constructed to be too small? The fact was that the building construction was
38 ASHRAE Journal
Photo 12: Inspection of an air intake revealed a non-watertight solution as a feedthrough pipe perforated the vapor barrier, allowing water to flow down into the building. completed before the actual required air ventilation dimensions were calculated. In this case it was claimed that there was not enough room for making the ventilation dimensions large enough (Photo 8).
Photo 13: Ad hoc solution for temporarily coping with water ingress problem. It’s almost like getting a Roman aquaduct in the bedroom. employees and students with both offices and laboratories. In fact, this vertically placed wall intake does not experience any significant problems with snow and rain inlet. The space (a hallway, Photo 9) inside the intake grid and blinds (louver) is large enough to decrease the air speed substantially, avoiding snow from being blown into the air intake. Some amounts of snow and rain are occasionally observed on the floor just
April 2012
Example 3: Large Wall and Room Intake
A building located at a university campus has one large fresh air ventilation intake placed vertically on a wall (Photo 9). The building is used by university
ashrae.org
ASHRAE Journal - April 2012
Table of Contents for the Digital Edition of ASHRAE Journal - April 2012
ASHRAE Journal - April 2012
Contents
Commentary
Industry News
Meetings and Shows
Letters
Feature Articles
Effects of Typical Inlet Conditions on Air Outlet Performance
Designing for IAQ in Natatoriums
Shielding Fresh Air Ventilation Intakes
Don’t Turn Active Beams Into Expensive Diffusers
Technology Award Case Studies:
Deere: Running Efficient
Standing Columns
Building Sciences
Washington Report
Emerging Technologies
Refrigeration Applications
Products
Classified Advertising
Advertisers Index
ASHRAE Journal - April 2012 - ASHRAE Journal - April 2012
ASHRAE Journal - April 2012 - Cover2
ASHRAE Journal - April 2012 - 1
ASHRAE Journal - April 2012 - 2
ASHRAE Journal - April 2012 - Contents
ASHRAE Journal - April 2012 - Commentary
ASHRAE Journal - April 2012 - 5
ASHRAE Journal - April 2012 - Industry News
ASHRAE Journal - April 2012 - 7
ASHRAE Journal - April 2012 - 8
ASHRAE Journal - April 2012 - 9
ASHRAE Journal - April 2012 - 10
ASHRAE Journal - April 2012 - 11
ASHRAE Journal - April 2012 - 12
ASHRAE Journal - April 2012 - Letters
ASHRAE Journal - April 2012 - Meetings and Shows
ASHRAE Journal - April 2012 - 15
ASHRAE Journal - April 2012 - Effects of Typical Inlet Conditions on Air Outlet Performance
ASHRAE Journal - April 2012 - 17
ASHRAE Journal - April 2012 - 18
ASHRAE Journal - April 2012 - 19
ASHRAE Journal - April 2012 - 20
ASHRAE Journal - April 2012 - 21
ASHRAE Journal - April 2012 - 22
ASHRAE Journal - April 2012 - 23
ASHRAE Journal - April 2012 - Designing for IAQ in Natatoriums
ASHRAE Journal - April 2012 - 25
ASHRAE Journal - April 2012 - 26
ASHRAE Journal - April 2012 - 27
ASHRAE Journal - April 2012 - 28
ASHRAE Journal - April 2012 - 29
ASHRAE Journal - April 2012 - 30
ASHRAE Journal - April 2012 - 31
ASHRAE Journal - April 2012 - 32
ASHRAE Journal - April 2012 - 33
ASHRAE Journal - April 2012 - Shielding Fresh Air Ventilation Intakes
ASHRAE Journal - April 2012 - 35
ASHRAE Journal - April 2012 - 36
ASHRAE Journal - April 2012 - 37
ASHRAE Journal - April 2012 - 38
ASHRAE Journal - April 2012 - 39
ASHRAE Journal - April 2012 - 40
ASHRAE Journal - April 2012 - 41
ASHRAE Journal - April 2012 - 42
ASHRAE Journal - April 2012 - 43
ASHRAE Journal - April 2012 - Deere: Running Efficient
ASHRAE Journal - April 2012 - 45
ASHRAE Journal - April 2012 - 46
ASHRAE Journal - April 2012 - 47
ASHRAE Journal - April 2012 - 48
ASHRAE Journal - April 2012 - 49
ASHRAE Journal - April 2012 - 50
ASHRAE Journal - April 2012 - 51
ASHRAE Journal - April 2012 - Don’t Turn Active Beams Into Expensive Diffusers
ASHRAE Journal - April 2012 - 53
ASHRAE Journal - April 2012 - 54
ASHRAE Journal - April 2012 - 55
ASHRAE Journal - April 2012 - 56
ASHRAE Journal - April 2012 - 57
ASHRAE Journal - April 2012 - 58
ASHRAE Journal - April 2012 - 59
ASHRAE Journal - April 2012 - 60
ASHRAE Journal - April 2012 - 61
ASHRAE Journal - April 2012 - Building Sciences
ASHRAE Journal - April 2012 - 63
ASHRAE Journal - April 2012 - 64
ASHRAE Journal - April 2012 - 65
ASHRAE Journal - April 2012 - 66
ASHRAE Journal - April 2012 - 67
ASHRAE Journal - April 2012 - 68
ASHRAE Journal - April 2012 - 69
ASHRAE Journal - April 2012 - Washington Report
ASHRAE Journal - April 2012 - 71
ASHRAE Journal - April 2012 - Emerging Technologies
ASHRAE Journal - April 2012 - 73
ASHRAE Journal - April 2012 - 74
ASHRAE Journal - April 2012 - 75
ASHRAE Journal - April 2012 - 76
ASHRAE Journal - April 2012 - 77
ASHRAE Journal - April 2012 - 78
ASHRAE Journal - April 2012 - 79
ASHRAE Journal - April 2012 - 80
ASHRAE Journal - April 2012 - Refrigeration Applications
ASHRAE Journal - April 2012 - 82
ASHRAE Journal - April 2012 - 83
ASHRAE Journal - April 2012 - Products
ASHRAE Journal - April 2012 - 85
ASHRAE Journal - April 2012 - Classified Advertising
ASHRAE Journal - April 2012 - 87
ASHRAE Journal - April 2012 - Advertisers Index
ASHRAE Journal - April 2012 - Cover3
ASHRAE Journal - April 2012 - Cover4
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_MCDEBX
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_WNYSQY
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_XATVOD
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_FJSHSS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_CCBZDS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_XDEFVG
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2023november_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2023november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_VHGNBL
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_WPKBNJ
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_UUVCDE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_RTGDEW
https://www.nxtbook.com/nxtbooks/ashrae/ashraemexico_2023
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_LKRFXS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_AZSOFG
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ERCDBH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_QWDFRV
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JHGVDF
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_OPUYHG
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SREIBM
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_LRTGLK
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_OKRFGH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2022november_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2022november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_TZSERA
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_LVRUIX
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_RPTVYZ
https://www.nxtbook.com/nxtbooks/ashrae/mini_pub_catalog
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_XIYTGD
https://www.nxtbook.com/nxtbooks/ashrae/ashraemexico_2022
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_RFGDOB
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_PABXNU
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_REMKLS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_PICVBT
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_AOYTVW
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JQOPLS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_IOYTBC
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SGAJJF
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_IGHYER
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_PDRKLS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2021november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2021november_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_XCODFR
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_QSLFGO
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