: BB2025, MU2025, NC2025, RAM2000 York : YMU2025, YNC2025 The Nordyne 918397 can be used to replace collection cells in second generation ("flat top") electronic air cleaner that with their cells removed have a clear opening at least 20 1/4" x 25 3/8" x 5 1/4". The Nordyne 918397 air filter can