Make-Up Air Systems: Direct-Fired
Direct-Fired Make-Up Air System Manufacturers
Modine
Featured Make-Up Air Systems: Direct-Fired
Modine - Direct-Fired Indoor/Outdoor Make-up Air
Modine’s Direct-Fired Indoor/Outdoor Make-up Air units deliver 100% thermal efficiency by directly heating outside air with a gas flame, eliminating heat exchanger losses. Ideal for cost-sensitive commercial applications requiring 100% outside air, these units offer airflow from 800 to 14,000 CFM and inputs up to 2,100,000 BTU/hr. Available in constant (MCV/DCV) or variable-speed (MVV/DVV) fan models, they feature smart combustion controls and low-maintenance designs :cite[1]:cite[4]:cite[6].
Features
100% Thermal Efficiency
Direct gas-fired heating achieves 100% thermal efficiency (92% sensible cooling) by bypassing heat exchangers :cite[1]:cite[6].
Auto-Velocity™ Combustion System
Automatically adjusts burner air velocity for optimal combustion under varying airflow/static pressure conditions :cite[1]:cite[7].
Low-Maintenance Design
Includes aluminum cast burners, stainless steel mixing plates, and foil-faced insulation for easy cleaning :cite[1]:cite[4].
Smart Installation Features
Prewired 10-foot harnesses, labeled wiring, and floor-mounted chase simplify electrical connections :cite[1]:cite[3].
Quiet Operation
Neoprene-isolated blowers and motors reduce noise levels in commercial settings :cite[4]:cite[7].
Specifications
Input Capacity
75,000–2,100,000 BTU/hr (natural/propane) with 30:1 turndown capability :cite[1]:cite[4].
Airflow Range
800–14,000 CFM (constant or variable speed) :cite[1]:cite[6].
Model Options
MCV/DCV (constant speed) or MVV/DVV (variable speed) for 100% outside air :cite[3]:cite[7].
Controls
Direct Spark Ignition (DSI) for units ≤1125MBH; optional BACnet®/LonWorks® integration :cite[1]:cite[4].
Certifications
ETL certified and compliant with industry safety standards :cite[5]:cite[8].
Warranty
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Features
Specifications
Warranty
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Features
Specifications
Warranty
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Features
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Warranty
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