5018 SUNSET LN 2016-01-01 MF Import

N@W dUCt SySt@R1S must leak less than 6% of the air handler's flow. The Maximum allowable duct tester measurement based on 4 di!ferent ways of calculating air handler flow is: 1. For A/C systems multiply the Tonnage X 24 cfm. TONNAGE _ X 24 =_ cfm Assumes 400 cfm per T«i witb maximum altowable leakage of 6% � 24 cfm per Ton. E.g. a 5 Ton system must have 5 X 24 = 120 cfm of leakage or less at a 25 Pa test pressure in the supplies. 2. For Heating systems divide the BTU /1000 X 1302 cfm. BTl' �� /1000 X 1302 =_cfm Assumes 21.7 c!m per 7000 BTU tapadry with maxlmum allowable leakage of 6% • 1.302 cfm per 1000 BTU. E.g. a 100,000 BTU furnace must have 100,000 / 1000JC 1.302 = 132 cfm of leakage or less. 3. For dimates 8 through 15 divide the Floor Area by 1000 X 42 cfm:�"" Roor Area / 1000 X 42 �_cfm For dimate zones 7 and 16 divide the Floor Area by 1000 X 30 cfm Floor Area / 1000 X 30 =_cfm E.g. a 3,000 sq. ft. home must have 3,000 / 1000 X 42 = 126 cfm or less for climates 8 through 15 E.g. a 3,000 sq. ft. home must have 3,000 / 1000 X 30 = 90 cfm or less for dimate zones 7 and 16, 4. Measure the fan flow divided by 100 X 6. Measured fan flow / 100 X 6=_cfm E.g. an air-handler blower flow of 2000 cfm must have 2000 / 100 X 6= 120 cfm of leakage or less. EX�StI�g dUCt SyStefTls must leak less than 15% ot the air handler's flow. The Maximum allowable duct tester measurement based on 4 different ways of calculating air handler ftow is: 1. For A/C systems multiply the Tonnage X 60 cfm. TONNAGE _ X 60 =_ cfm Assumes 400 cfm per Ton with maximum allowable leakage of 15% • 60 cfm per Ton. E.g. a 5 Ton system must have 5 X 60 = 300 cf�n of leakage or less at a 25 Pa test pressure in the supplies. 2. For Heating systems divide the BTU /1000 X 3.255 cfm. BTU Assumes 21.7 cfm per 1000 BTU capadty with maximum allowable teakage of 75% = 1302 c(m per 7000 BTU. /1000 X 3.255 = _cfm E.g. a 100,000 BTU furnace must have 100,000 / 1000 X 3.255 = 326 cfm of leakage or less. 3. For dimates 8 through 15 divide the Floor Area by 1000 X 105 cfm. Floor Area / 1000 X 105 =_cfm For climate zones 7 and 16 divide the Floor Area by 1000 X 75 cfm Floor Area / 1000 X 75 =_cfm E.g. a 3,000 sq. ft. home mus[ have 3,000 / 1000 X 105 = 315 cfm or less for climates S through 15 E.g, a 3,000 sq. ft. home must have 3,000 / 1000 X 75 = 225 :fm or less for climate zones 7 and 16. 4. Measure the (an flow divided by 100 X 15. Measured fan flow / 100 X 15 =_cfm Jan. 26, 09 E.g. an air•handler blower (low of 2000 cfm must have 2000 / 100 X 15 = 300 cfm of leakage or less. by ��Z