MQL Indoor Air-Handling Units

The perfect air handler for schools, hospitals, and commercial buildings

The ENVIRO-TEC MQL is a reliable, easy-to-clean commercial HVAC system with a flexible design—so you can customize it to fit your building and your needs.

  • CFM: 600 to 10,000 CFM
  • Flexible Cabinet Design – Modular sections to build a unit that fits your specification, can be horizontal or vertical arrangements.
  • Flexible Coil Design – Chilled-water or direct-expansion coil for cooling, hot-water, steam, or electric coil for heating; 2- or 4-pipe.
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Product Overview

When it comes to managing and improving indoor air quality, we know that you don’t want something generic. You need an air-handling solution that delivers healthy air and perfectly fits the needs of your commercial space—whether that’s a school, hospital, shopping center, or other commercial building. Enter the ENVIRO-TEC MQL Indoor Air-Handling Unit—an efficient, commercial heating and cooling system with the customizable design you’ve been looking for. Nearly everything can be changed to meet your needs: the configuration, the size, the filters, the access panels, and more. You can even customize the acoustics of this unit, an important feature in spaces where noise control is critical for building owners and occupants. With the MQL, the ability to configure the fan and coil vertically works very well for sound-sensitive areas.
Product Overview


Excellent Indoor Air Quality (Iaq)
Excellent Indoor Air Quality (IAQ)

Sloped drain pans, high performance filters and cabinets that can be insulated improve indoor air quality (IAQ) and reduce sound levels.

Design Flexibility
Design Flexibility

An extensive range of options include chilled-water or direct expansion coil for cooling, hot water, steam, or electric coil for heating.

Optimized Performance
Optimized Performance

ENVIRO-TEC fan and blower coil units are manufactured from galvanized steel and designed to meet the highest standards of quality to maximize performance.

Convenient Installation
Convenient Installation

Component flexibility and units that can ship fully assembled reduce installation time, labor, and cost.


  • IAQ galvanized drain pans are double sloped to prevent standing water and minimize microbial growth.
  • Single-point power connection—even with electric heat—simplifies installation
  • Single-wall and double-wall galvanized construction available.
  • Factory-packaged air-handling units are factory-mounted and wired and available with starters or variable-frequency drives; simply connect power, piping, and ductwork and the units are ready for operation—an excellent way to minimize installation time, coordination, and costs while increasing reliability (optional).
  • Customized options include high-efficiency filters and 15" and 30" access panels (optional).
  • Stainless-steel drain pans (optional)
  • Fan Options – Belt drive forward curved fans available.
  • 18 month Limited Warranty
  • Removable access panels for improved accessibility, cleanability, and serviceability.
  • Internal-spring -solation standard on all unit sizes 02–17
  • Double-wall construction enhances indoor air quality, protects insulation, and provides the ability to clean the inside of the unit.
  • Quiet, flexible, acoustical discharge plenums may be used for sound-sensitive projects (optional).
  • Hinged access doors with quick-action latches (optional).
  • Piping packages with 2-way or 3-way on/off, modulating, or proportional control valves, and fixed or adjustable PICV flow control devices.
  • Power components – Variable frequency drive or magnetic motor starters; disconnect switches; main fusing; high-efficiency motors.

Technical Resources

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