ECONOMIZERS & MIXING BOXES
Economizers & Mixing Boxes — Practical Knowledge for Real-World HVAC Applications
Economizers and mixing boxes play a critical role in energy efficiency and ventilation strategy. When properly configured, these components help reduce operating costs by leveraging outdoor air conditions or recycling energy already present in the system. When misapplied or incorrectly set up, however, they can create performance issues, comfort complaints, and unnecessary energy waste.
At MicroMetl, we bring nearly 60 years of experience designing and manufacturing economizers and mixing boxes. Our goal is simple: break down these complex concepts into clear, approachable guidance that helps you make confident decisions in the field.
In this section, you’ll find easy-to-understand explanations, troubleshooting insights, and practical tips for optimizing airflow, controls, and system performance.
Have a question or a challenge you’ve encountered in the field?
Let us know—your topic may become the next feature in our multimedia blog.
Mixing Boxes For Residential Applications
Many articles have been written about Night Air Cooling — AKA “Free Cooling.” Those articles explain how turning off the Air Conditioner (A/C), opening windows, or turning on a whole house fan at night can lower your energy bills… Have You Considered A Mixing Box? A Mixing Box offers the security of having your windows & doors closed and secured at night, yet provides “Free Outdoor Air Cooling.”
Economizer Installation Instruction Into A SRT Carrier, Bryant, ICP Rooftop!
Here are step by step instructions on how to install a Horizontal Economizer And/Or Vertical Economiser into A Carrier, Bryant, or ICP Rooftop! These are two great videos geared toward field technicians but can be used to train and educate customer service and...
Economizer Types Defined
Economizers are mechanical devices used to make the Heating Ventilation and Air Conditioning (HVAC) unit more efficient by regulating the return air and outside air. Economizers come in many different configurations. Low Leak is defined as an industry requirement...
Economizers – Setting Minimum Position
What is, And How To Determine Economizer Minimum Position Economizer instructions explain how to set, and adjust the minimum open position for outside air dampers via a controller. However, they don't tell us where to physically position the damper blades as to...
Barometric Relief – What Is It, And How Much Air Does It Remove?
Barometric Relief What Is It And How Much Air Does It Remove? A reader recently asked; What is Barometric Relief, and how much air does it remove? It’s important to provide fresh, healthy air to a building’s occupants. Therefore, when
What Is An Ultra Low Leak Economizer?
What Is An Ultra Low Leak Title 24 Economizer? Title 24 Economizer Mandatory & Prescriptive Defined, Title 24 Section 120.2 & 140.4 Excerpt PDF
Honeywell’s JADE W7220 Controller – The 101 Basics!
Honeywell's JADE W7220 Controller The 101 Basics! Before we begin; if you're not familiar with the basics of an economizer, read the article; “What Is An Economizer – AKA Mixing Box?” Many of the blogs and articles about the JADE W7220 Economizer Controller have been...
What Is An Economizer – AKA Mixing Box? Economizers Class 101!
Saving Money and Lowering the Cooling Load is really what an economizer does. Webster defines economize as to “reduce expenses.” In its most simplistic form, an economizer is nothing more than a device which introduces fresh outside air into a building space in a controlled manner
California Title 24 Economizer Requirements – How Will They Affect You?
California Title 24 Economizer Requirements – How Will They Affect You? Beginning January 1, 2014, California will enact California Energy Commission (CEC), Title 24. Several U.S. States are considering an implementation in part or whole of Title 24. California code...
“The Cube” Residential and Small Commercial Mixing Box / Economizer
“The Cube” Residential & Small Commercial Mixing Box / Economizer Download "The Cube" Mixing Box Sales Brochure - Here! There is nothing more frustrating than getting onto the job site to install a mixing box, only to discover that the duct work was incorrectly...
