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Filters on daikin ducted minisplits
I have an outdoor heat pump compressor hooked up to an indoor wall unit mini split and then also a large ducted minisplit. I'm trying to figure out how to Change the air filter in that large unit. It exposed in a loft space with ducts running to each bedroom. I'm unsure of the terminology, is it an air handler that has the ducts running off it or is it still just called a mini split? Either way- is there an air filter somewhere in there that should be cleaned or changed periodically? There's an grate on the top of it with some dust on it which I'm assuming is for the return air, but there is no filter there.