Cov ntxaij lim dej cua ua haujlwm tseem ceeb hauv cov chaw lag luam thiab chaw haujlwm. Vim tias cov huab cua hauv tsev yog feem ntau tshaj ob mus rau tsib zaug ntxiv tias cov huab cua sab nraud, cov huab cua lim dej yuav tsum tau tshem tawm cov khoom ua pa xws li cov kab mob hauv lub cev, cov hmoov av thiab kev phiv los ntawm cov pa pa. Qhov tseeb, cov ntxaij lim cua muaj kev tiv thaiv rau cov neeg nyob hauv tsev thiab HVAC khoom tiv thaiv cov pa phem. Cov lim dej tau nce ntau zuj zus siv hauv cov tsev ntawv pej xeem kom tshem tawm cov pa phem. Yog li ntawd, nws yog ib qho tseem ceeb kom nkag siab kev lim dej kom zoo thiab ua haujlwm zoo.
Lub lim MERV (Cov Khoom Ua Yeeb Yam Ntaus Nqi Heev Qhia Tau Zoo Tshaj Plaws) qhov ntaus nqi yog ib qho kev ntsuas zoo rau kev xav. Nws yog tsim los ntawm American Society of Cua Sov, Cov Tub Hluav Taws Xob thiab Cov Cua Txias, thiab yog qhov kev ntsuam xyuas ntau tshaj plaws rau kev sib piv hauv cov huab cua lim dej. Lub hom phiaj ntawm MERV kev ntsuas yog ntsuas seb cov khoom siv lim npaum li cas thaum tshem tawm cov pa tawm ntawm cov pa kwj deg raws li cov khoom kis tau los ntawm lub lim. Rau cov ntawv thov thaj chaw, qhov ntsuas feem ntau yog li ntawm 1 mus rau 13, nrog tus naj npawb ua haujlwm tau qhia tias qhov lim npaum li cas yuav tshem cov teeb meem uas muaj teeb meem ntawm huab cua. Ib tus zauv ntau dua qhia tias ntau dua ntawm kev pom zoo rau qhov loj me me.
Txhom | Ua tau zoo | MERV | European Efficiency Cov Qib Kawm | Lim hom |
60-80% | Tsawg dua 20% | MERV 1-4 | G1, G2 | Siv Vaj Huam Sib Luag Tshaj Plig |
80-90% | Tsawg dua 20% | MERV 5 | G3 | Siv Vaj Huam Sib Luag Tshaj Plig Ntiv Nplhaib Vaj Huam Sib Luag Khoom cua hluavtaws |
90-95% | 20-30% | MERV 6 | G4 | Lub voos xwmfab lim |
95-98% | 25-40% | MERV 7-8 | G4 | Pleated Vaj Huam Sib Luag |
99% | 50-60% | MERV9 -10 | F5 | Pleated Vaj Huam Sib Luag Cov ntxaij lim dej Sib zog ntawm cov ntxaij lim dej |
99% | 60-70% | MERV 10-11 | F6 | Pleated Vaj Huam Sib Luag Cov ntxaij lim dej Sib zog ntawm cov ntxaij lim dej |
99% | 70-80% | MERV 12-13 | F6 | Hnab Ntxaum Ntxoov Ntxoo |
99% | 80-85% | MERV 13 | F7 | Vaj Huam Sib Luag |
99% | 80-90% | MERV 13-14 | F7 | Pocket Fitlers Sib zog ntawm cov ntxaij lim dej |
99% | 90-95% | MERV 14-15 | F8 | Hnab Ntxaum Ntxoov Ntxoo Sib zog ntawm cov ntxaij lim dej |
N / A | 95% | MERV 16 | H11 | Sib zog ntawm cov ntxaij lim dej |
N / A | 99.97% 99.99% | N / A | U13-14 U15 | HEPA / ULPA lim |