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1) Material: Non-woven fabrics., 2) Eifficiency: G3, 3)Frame:paper, 4)Low price - details see: https://www.machineto.com/foldaway-plank-air-filter-pre-air-filter-plank-air-filter-10229444

Foldaway paper frame filter

1.The filtration material is made from non-woven fabrics, and the synthetic fibre. it has the advantage of the large dust holding capacity, the low pressure loss in the initial period and lager air flow

2.The filtration material compounds with the material net, and is designed into the foldaway, which will provide the current air with the largest filtration area, 5 times' filtration area as the common plane mesh. Paper frame and metal frame are available, which is convenient for replace; Less purchasing expense

3.The humidity resistance 100%

4.Temperature resistance 80°c

5.The rank of the filtration: G4.F5.F6.F7.F8

Using

Pre-filter for the air-condition filtration system. It can lengthen the working life of the middle and high efficiency filter

Parameter list is as follows:

Normal size	Size W*H*D(mm)	Rated air flow(m/h)
		1.5m/s	2.5m/s	3.0m/s
24*24*1	595*595*22	2040	3400	-
20*24*1	495*595*22	1785	2975	-
20*20*1	495*495*22	1445	2380	-
16*24*1	395*595*22	1350	2200	-
24*24*2	595*595*44	2040	3400	4250
20*24*2	495*595*44	1700	2805	3570
20*20*2	495*495*44	1445	2380	2975
16*24*2	390*595*44	1445	2380	2675
16*20*2	390*495*44	1105	1870	2380
16*24*2	287*595*44	1020	1700	2125
24*24*4	595*595*90	2040	3400	4250
20*20*4	495*495*90	1455	2380	2975
12*24*4	287*595*90	1020	1700	2125

Detail is as follows: