https://atomicfilters.com/blogs/news/... Tutorial instructions assembling Trane Quickbox filter ServiceFirst
New compatible Atomic FLRQB5AH23M11 no assembly required:
https://atomicfilters.com/products/at...
Atomic Compatible for FLRQB5AH23M11 Now available NO ASSEMBLY REQUIRED
https://atomicfilters.com/products/at...
Envirowise Models:
FLRQB5AH18M11
FLRQB5AH21M11
FLRQB5AH23M11
FLRQB5AH26M11
FLRQB5DN17M11
FLRQB5FR16M11
FLRQB5FR17M11
FLRQB5FR21M11
FLRQB5FR24M11