4WG means 4-pass Wet-back fire tube Boiler with Gun Burner in Commercial
Similar to 4WG
ACM - Asbestos Contaminated MaterialACM - Air Conditioning Motor
ACM - All China Made
ACMV - Air Conditioning Mechanical Ventilation
ACMV - Assist Controlled Mechanical Ventilation
ACORN - Associations Of Communities Organized For Reform Now
ACOS - Adjustable Coil Over Spacer
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