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  1. Home
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  3. Air-Handling Units
  4. MQL Indoor Air-Handling Units
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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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MQL Indoor Air-Handling Units

  • Overview
  • Benefits
  • Features
  • Product Literature
  • Related Products

    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

    Benefits

    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.

    Features

    • 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

    Document Name
    Description
    Language
    Resource Type

    Installation Guide

    ET102.19-NOM1_MQL (English)

    MQL Series B Indoor Air Handling Unit

    English Installation Guide
    VIEW

    Catalog

    AID_CAT_ET102.19-EG1_MQL (English)

    MQL Modular Air-Handling Units

    English Catalog
    VIEW

    Specification Guide

    MQL-SPEC_MQL (English)

    Air-Handling Unit Guide Specifications

    English Specification Guide
    VIEW

    Technical Guide

    100.43-EG1 (English)

    MQL Variable Frequency Drives: AYK580 Air-Modulator

    English Technical Guide
    VIEW

    Submittal

    MQLControlWiringDiagrams_MQL (English)

    MQL Control Wiring Diagrams

    English Submittal
    VIEW

    Reference Guide

    Model Number Cross Reference-MQL AHU (English)

    Air Handler Model Number Cross Reference

    English Reference Guide
    VIEW

    Submittal

    65-80014_MQL (English)

    Model MQL Configuration with Dimensions

    English Submittal
    VIEW

    Submittal

    65-80013_MQL (English)

    Model MQL External Flat Filter (EFM)

    English Submittal
    VIEW

    Submittal

    65-80002_MQL (English)

    Model MQL Small Access (SAM)

    English Submittal
    VIEW

    Submittal

    65-80020_MQL (English)

    Model MQL Small Coil (SCM)

    English Submittal
    VIEW

    Submittal

    65-80009_MQL (English)

    Model MQL Small Flat Filter (SFM)

    English Submittal
    VIEW

    Submittal

    65-80003_MQL (English)

    Model MQL Medium Access (MAM)

    English Submittal
    VIEW

    Submittal

    65-80010_MQL (English)

    Model MQL Medium Coil (MCM)

    English Submittal
    VIEW

    Submittal

    65-80026_MQL (English)

    Model MQL Medium FlowStar Mixing Box with Flat Filter (MFM), Sizes 02-08

    English Submittal
    VIEW

    Submittal

    65-80027_MQL (English)

    Model MQL Medium FlowStar Mixing Box with Flat Filter (MFM), Sizes 10-12

    English Submittal
    VIEW

    Submittal

    65-80028_MQL (English)

    Model MQL Medium FlowStar Mixing Box with Flat Filter (MFM), Size 14

    English Submittal
    VIEW

    Submittal

    65-80029_MQL (English)

    Model MQL Medium FlowStar Mixing Box with Flat Filter (MFM), Size 17

    English Submittal
    VIEW

    Submittal

    65-80071_MQL (English)

    Model MQL Medium FlowStar Inlet Plenum with Flat Filter (MIM), Sizes 02-08

    English Submittal
    VIEW

    Submittal

    65-80072_MQL (English)

    Model MQL Medium FlowStar Inlet Plenum with Flat Filter (MIM), Sizes 10-12

    English Submittal
    VIEW

    Submittal

    65-80073_MQL (English)

    Model MQL Medium FlowStar Inlet Plenum with Flat Filter (MIM), Size 14

    English Submittal
    VIEW

    Submittal

    65-80074_MQL (English)

    Model MQL Medium FlowStar Inlet Plenum with Flat Filter (MIM), Size 17

    English Submittal
    VIEW

    Submittal

    65-80021_MQL (English)

    Model MQL Medium Mixing Box with Flat Filter (MMM)

    English Submittal
    VIEW

    Submittal

    65-80060_MQL (English)

    Model MQL Medium Inlet Plenum with Flat Filter (MRM)

    English Submittal
    VIEW

    Submittal

    65-80037_MQL (English)

    Model MQL Medium V-Bank Filter Module (MVM)

    English Submittal
    VIEW

    Submittal

    65-80005_MQL (English)

    Model MQL Horizontal FC Fan (HFM)

    English Submittal
    VIEW

    Submittal

    65-80008_MQL (English)

    Model MQL Vertical Coil (VCM)

    English Submittal
    VIEW

    Submittal

    65-80007_MQL (English)

    Model MQL Vertical FC Fan (VFM)

    English Submittal
    VIEW

    Submittal

    65-80057_MQL (English)

    Model MQL Vertical Coil and Vertical FC Fan (VCM, VFM) and Control Enclosure, Sizes 03/04

    English Submittal
    VIEW

    Submittal

    65-80064_MQL (English)

    Model MQL Small Tall Coil (STM)

    English Submittal
    VIEW

    Submittal

    65-80004_MQL (English)

    Model MQL Large Access (LAM)

    English Submittal
    VIEW

    Submittal

    65-80015_MQL (English)

    Model MQL Large FlowStar Mixing Box with V-Bank Filter (LFM), Sizes 02-08

    English Submittal
    VIEW

    Submittal

    65-80023_MQL (English)

    Model MQL Large FlowStar Mixing Box with V-Bank Filter (LFM), Sizes 10-12

    English Submittal
    VIEW

    Submittal

    65-80024_MQL (English)

    Model MQL Large FlowStar Mixing Box with V-Bank Filter (LFM), Size 14

    English Submittal
    VIEW

    Submittal

    65-80025_MQL (English)

    Model MQL Large FlowStar Mixing Box with V-Bank Filter (LFM), Size 17

    English Submittal
    VIEW

    Submittal

    65-80066_MQL (English)

    Model MQL Large FlowStar Inlet Plenum with V-Bank Filter (LIM), Sizes 02-08

    English Submittal
    VIEW

    Submittal

    65-80068_MQL (English)

    Model MQL Large FlowStar Inlet Plenum with V-Bank Filter (LIM), Sizes 10-12

    English Submittal
    VIEW

    Submittal

    65-80069_MQL (English)

    Model MQL Large FlowStar Inlet Plenum with V-Bank Filter (LIM), Size 14

    English Submittal
    VIEW

    Submittal

    65-80070_MQL (English)

    Model MQL Large FlowStar Inlet Plenum with V-Bank Filter (LIM), Size 17

    English Submittal
    VIEW

    Submittal

    65-80001_MQL (English)

    Model MQL Large Mixing Box with V-Bank Filters (LMM)

    English Submittal
    VIEW

    Submittal

    65-80061_MQL (English)

    Model MQL Large Inlet Plenum with V-Bank Filter (LRM)

    English Submittal
    VIEW

    Submittal

    65-80011_MQL (English)

    Model MQL Large Discharge Plenum (LPM)

    English Submittal
    VIEW

    Submittal

    65-80000_MQL (English)

    Model MQL FC Fan and Coil Combination (FCM)

    English Submittal
    VIEW

    Submittal

    65-80012_MQL (English)

    Model MQL Electric Heat Blow-Thru (EHB)

    English Submittal
    VIEW

    Submittal

    65-80016_MQL (English)

    Model MQL Motor Weights

    English Submittal
    VIEW

    Submittal

    65-80095_MQL (English)

    Model MQL 4" Base Rail

    English Submittal
    VIEW

    Submittal

    65-80018_MQL (English)

    Model MQL Coil Weights

    English Submittal
    VIEW

    Submittal

    65-80075_MQL (English)

    Model MQL Service/Maintenance Clearance

    English Submittal
    VIEW

    Submittal

    65-80076_MQL (English)

    Model MQL Connection Flange Dimensions

    English Submittal
    VIEW

    Submittal

    65-80077_MQL (English)

    Model MQL Airflow Calibration

    English Submittal
    VIEW

    Submittal

    65-80030 (English)

    Model MQL Single Coil SCM, MCM, FCM, VCM, STM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80031 (English)

    Model MQL 1 Row Hot Water Preheat and Chilled Water MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80032 (English)

    Model MQL 2 Row Hot Water Preheat and Chilled Water MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80033 (English)

    Model MQL 3 Row Hot Water Preheat and Chilled Water MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80034 (English)

    Model MQL 4 Row Hot Water Preheat and Chilled Water MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80035 (English)

    Model MQL 6 Row Chilled Water and Hot Water Reheat MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80036 (English)

    Model MQL 8 Row Chilled Water and Hot Water Reheat MCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80038 (English)

    Model MQL Single Direct Expansion Coil MCM, FCM, VCM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80039 (English)

    Model MQL 1 Row Hot Water Preheat and Direct Expansion MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80040 (English)

    Model MQL 2 Row Hot Water Preheat and Direct Expansion MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80041 (English)

    Model MQL 3 Row Hot Water Preheat and Direct Expansion MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80042 (English)

    Model MQL 4 Row Hot Water Preheat and Direct Expansion MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80043 (English)

    Model MQL 3 Row Direct Expansion and Hot Water Reheat MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80044 (English)

    Model MQL 4 Row Direct Expansion and Hot Water Reheat MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80045 (English)

    Model MQL 6 Row Direct Expansion and Hot Water Reheat MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80046 (English)

    Model MQL 4 Row Chilled Water and Hot Water Reheat MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80047 (English)

    Model MQL 8 Row Direct Expansion and Hot Water Reheat MCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80052 (English)

    Model MQL 4 Row Chilled Water and Direct Expansion Redundant Cooling MCM, FCM, VCM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80053 (English)

    Model MQL 6 Row Chilled Water and Direct Expansion Redundant Cooling MCM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80078 (English)

    Model MQL Single Steam Coil SCM, MCM, FCM, VCM, STM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80079 (English)

    Model MQL 1 Row Steam Preheat and Chilled Water Coil MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80080 (English)

    Model MQL 2 Row Steam Preheat and Chilled Water Coil MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80081 (English)

    Model MQL 1 Row Steam Preheat and Direct Expansion Coil MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80082 (English)

    Model MQL 2 Row Steam Preheat and Direct Expansion Coil MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80083 (English)

    Model MQL 3 Row Direct Expansion and Steam Reheat MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80084 (English)

    Model MQL 4 Row Direct Expansion and Steam Reheat MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80085 (English)

    Model MQL 6 Row Direct Expansion and Steam Reheat MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80087 (English)

    Model MQL 8 Row Direct Expansion and Steam Reheat MCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80086 (English)

    Model MQL 4 Row Chilled Water and Steam Reheat MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80088 (English)

    Model MQL 6 Row Chilled Water and Steam Reheat MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW

    Submittal

    65-80089 (English)

    Model MQL 8 Row Chilled Water and Steam Reheat MCM, FCM, VCM, MTM Coil Connection Locations

    English Submittal
    VIEW
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