Non-clapboard type high efficiency air filter It separates the filter by the hot melt adhesive instead of aluminum foil with baffle filters Without the baffle, the non-clapboard type high efficiency air filter with 50mm thick can reach the performance of the 150mm thick partition filter. The air flow of the 90mm thick frame of HEPA can be 1.3 times larger than that of clapboard type high efficiency air filter with 150mm thick the standard resistance type and 2 times larger than that of SPAN, 150 mm thick standard resistance type in the case of the same filter area and filter efficiency. It can meet today's air purifier on the stringent requirements of space and weight and energy consumption.