• 60
    Years of
    Experience

HVAC Mixing Boxes for Controlled Ventilation

MicroMetl designs and manufactures HVAC mixing boxes engineered for seamless integration with rooftop units and residential systems, providing controlled ventilation and balanced airflow.

MicroMetl Mixing Boxes

Our solutions support contractors, engineers, and distributors with precision-built products that meet ventilation requirements and real-world application demands.

A mixing box introduces fresh outside air into a system and blends it with return air before it enters the unit. By regulating the proportion of outside and return air through coordinated dampers, mixing boxes help maintain indoor air quality, ensure proper airflow balance, and support consistent system operation across a wide range of applications.

MicroMetl offers mixing box solutions for both commercial and residential systems, designed to match a variety of unit configurations and airflow requirements. Each unit is manufactured in the United States using precision fabrication and rigorous quality control standards, ensuring accurate fit, reliable performance, and long-term durability in the field.

Whether you’re specifying a new system or upgrading an existing unit, our focus is on delivering application-ready solutions—mixing boxes that integrate seamlessly, meet ventilation requirements, and arrive ready to install with confidence.

Start Configuring your Economizer Talk to an Economizer Expert
CUBE Mixing Box
MB-TW1CA

Watch How MicroMetl Mixing Boxes Work

See how MicroMetl mixing boxes perform in real-world commercial and residential applications.

From installation and integration with rooftop units and HVAC systems to damper operation and airflow control, our solutions are designed for reliable performance, balanced ventilation, and ease of integration.

MicroMetl mixing boxes help improve indoor air quality through controlled ventilation while maintaining consistent airflow balance by properly blending outside and return air.

With simple, dependable operation, they support a wide range of applications and help ensure compliance with ventilation requirements and building standards.

Start Configuring Your HVAC Mixing Box
Economizer_Overview_Thumnail

MicroMetl Mixing Box Overview

01:51 Min

Play Video
PE_Overview_Thumnail

MicroMetl’s CUBE Mixing Box

01:27 Min

Play Video
Curb_Overview_Thumbnail

MicroMetl’s CUDOS Mixing Box

01:16 Min

Play Video

Search HVAC Mixing Boxes by Model or Part Number

Access our complete catalog of HVAC mixing boxes and quickly locate the exact product required for your system.

Our Company

Why Choose MicroMetl Mixing Boxes

MicroMetl delivers HVAC mixing boxes engineered for reliable ventilation control, seamless system integration, and consistent performance across commercial and residential applications.
Request a Quote for HVAC Mixing Boxes Log in for pricing & submittals

Precision Manufacturing You Can Rely On

MicroMetl mixing boxes are designed and manufactured in the United States using precision fabrication and rigorous quality control standards, ensuring accurate fit, dependable performance, and long-term durability in the field.

Designed for Controlled Ventilation

Our mixing boxes are engineered to regulate and balance outside and return air, helping maintain indoor air quality and consistent airflow across a wide range of HVAC applications

Seamless System Integration

Designed for compatibility with a variety of rooftop units and residential systems, MicroMetl mixing boxes simplify installation and ensure proper airflow alignment and system performance.

Reliable Supply and Responsive Lead Times

With U.S.-based manufacturing facilities and a strong distribution network, MicroMetl delivers dependable availability and responsive lead times to support projects of any size.

Frequently Asked Questions: HVAC Mixing Boxes

Find quick answers about MicroMetl HVAC mixing boxes, customization options, and product performance.

An HVAC mixing box is a device that introduces outside air into a system and blends it with return air before it enters a rooftop unit or HVAC system. It helps provide controlled ventilation, maintain indoor air quality, and ensure balanced airflow.

A mixing box uses dampers to regulate the amount of outside and return air entering the system. By adjusting these dampers, it creates a balanced air mixture that supports proper ventilation and consistent system operation.

Mixing boxes are commonly used to meet minimum ventilation requirements outlined by building codes and standards. Requirements vary based on application, system design, and local regulations.

MicroMetl offers mixing box solutions designed for both commercial and residential applications, with configurations to match a variety of unit types, airflow requirements, and installation needs.

Mixing boxes help maintain proper airflow balance by blending outside and return air, which supports indoor air quality and consistent system operation without introducing unnecessary complexity

You can request a quote through our website or by contacting our team directly.