The non-return valve and exhaust pipe of the flue may fall off after a long time, and the fan blades of the non-return valve need to be removed and cleaned every year to prevent the fan blades from being closed loosely.
If the fan blades are not closed tightly, the non-return valve needs to be replaced, so the flue inspection port must be left.
(1) The check valve is in the hanging cabinet. This situation is the very convenient, and there is no need to reserve an inspection port.
(2) The check valve is in the integrated ceiling. The integrated ceiling is very convenient to disassemble, and there is no need to leave an access hole.
(3) The check valve is in the plasterboard ceiling. Refer to the air conditioning access port reservation.
(4) The check valve is in the honeycomb ceiling. When customizing the honeycomb slab, the merchant is required to make the manhole with the honeycomb slab.
English
简体中文
