Our QAD Series direct gas fired make up air units are available in standard sizes from 1,000 to 100,000 CFM. 

Standard units are manufactured with heavy gauge G90 galvanized steel, insulated where needed, with 2" 3lb. non-wicking insulation, lined with 20 gauge galvanneal to eliminate airborne fibers entering the airstream. 

Fans are AMCA rated, either forward curved or backward inclined. 

Burners are proven brand name with stainless mixing plates capable of 25:1 turndown. 

Valve trains and controls are built to either CSA, IRI, FM or FM with vent. 

Direct gas fired units are the most efficient product to replace exhausted air and overcome negative pressure, reducing cold drafts, employee discomfort and absenteeism.