ActronAir Indoor Evaporator Fan Deck 9x7 S 1HP ECM was the 1HP ECM fan deck for ESP Plus Series 2 indoor units prior to being replaced by the updated 2520-347 assembly with a flipped module configuration for revised indoor unit housing geometry. This part has been replaced by 2520-347 -- if stock of 2520-313 is exhausted, 2520-347 is the current replacement and is compatible with the same indoor unit applications. Isolate power at mains before replacement -- live work on fan assemblies is dangerous and must only be performed by a qualified technician.