MicroMetl is the leader in HVAC Accessories Nationwide. Nearing our 50 year anniversary as a corporation, MicroMetl has nearly a half century of information and expertise. Only at MicroMetl will you get such a wealth of HVAC Industry knowledge. Stay above the learning curve, and visit us often for updates.
- FEATURED ARTICLE 100%
NEW NAME? ERV Principles & Products
Energy Recovery Ventilation (ERV) systems play a crucial role in modern HVAC design. They improve indoor air quality, reduce HVAC loads, and enhance overall comfort—while meeting today’s more demanding ventilation codes and efficiency standards. Whether you’re a...
- CONCENTRIC DIFFUSERS 100%
Installing a Concentric Diffuser: The Five Common Obstacles
The installation of a Concentric Diffuser is usually straight forward, however, obstacles can arise… Installing A Concentric Diffuser – The Five Obstacles
What Is A HVAC Concentric Airflow Diffuser System?
What Is A HVAC Concentric Airflow Diffuser System -- Heating, ventilation and air-conditioning units often utilize air duct systems throughout homes and commercial buildings. A Concentric Diffuser system is designed to eliminate the need for traditional duct-work by...
- CURBS – ROOFTOP 100%
Adjustable Pitch Roof Curb – A Complete Guide!
Adjustable pitch roof curbs are a variation of Knockdown Curbs that can be customized during installation to suit a roof pitched up to 1” in 12” in ANY direction. There are many situations in which an adjustable pitch roof curb is preferable to a fixed pitch curb… Read Why!
How to Measure for a Curb Adapter
You’re on the roof to replace the Rooftop Unit (RTU). The unit nameplate is so worn you can’t decipher the model number, even yet the brand or manufacturer. It is never practical to break the integrity of the existing roof to remove the existing Curb. Therefore, you must measure the existing curb and order a Curb Adapter.
- CURB ADAPTORS 100%
How to Measure for a Curb Adapter
You’re on the roof to replace the Rooftop Unit (RTU). The unit nameplate is so worn you can’t decipher the model number, even yet the brand or manufacturer. It is never practical to break the integrity of the existing roof to remove the existing Curb. Therefore, you must measure the existing curb and order a Curb Adapter.
The HVAC Industries First Curb Adapter Phone App! Quote It Now… Get It Now!
MicroMetl is the first and only in the HVAC industry to produce an exclusive Android/iPhone Curb Adapter App. No longer do you have to imagine the easy of searching for a replacement curb while on a roof! MIcroMetl is working hard to reduce your effort while improving...
- ELECTRICAL 100%
Basic Electricity Defined & Simplified
Those of us in the HVAC industry are faced with the complexity of electrical jargon whether we like it or not. This article is designed to explain the jargon, without attempting to make you into the next Thomas Edison.
The 101 Basics On NEMA Standards For Enclosures & Motors
NEMA is not a person — it’s the National Electrical Manufacturers Association, an organization that develops standards for a wide range of electrical equipment. Unlike a single-product rating system, NEMA provides standardized guidelines that cover hundreds of...
- ENERGY RECOVERY – ERV 100%
NEW NAME? ERV Principles & Products
Energy Recovery Ventilation (ERV) systems play a crucial role in modern HVAC design. They improve indoor air quality, reduce HVAC loads, and enhance overall comfort—while meeting today’s more demanding ventilation codes and efficiency standards. Whether you’re a...
MicroMetl – ERV Principles and Products
Understanding Energy Recovery Ventilation (ERV) is essential for anyone working with commercial HVAC systems. Whether you’re in the field, on the phone with customers, or assisting in system design, ERV knowledge helps you guide clients to the right solutions. To make...
- GENERAL TOPICS 100%
What Are QR Codes and Three Reasons Why You Should Use Them!
What Are QR Codes and Three Reasons Why You Should Use Them! What’s up with those crazy squares? To get Freudian, I think the blob resembles Big Foot, and could possibly reveal the burial place of Jimmy Hoffa. When psychologist Hermann Rorschach created the Inkblot...
How Does an Air Conditioner & Heat Pump Work? – Basic HVAC Tutorial
The Simplistic Definition of an Air Conditioner… An A/C system removes heat from inside your home, and transfers it outside. This article is intended to explain the most basic functionality and operation of an Air Conditioner System and Heat Pump.
- HVAC SENSORS & CONTROLS 100%
HVAC Sensors: CO₂ and On-Demand Ventilation
Carbon dioxide (CO₂) sensors play an increasingly important role in modern HVAC control strategies—especially in environments where occupancy varies throughout the day. When used correctly, these sensors help maintain indoor air quality, optimize ventilation, and...
HVAC – What’s the Difference Between a Motor and an Actuator?
Actuators and motors are commonly used in the HVAC industry, but not completely understood. What’s the difference between the two? In Geek Speak Terminology: The term “Actuator” typically refers to a device that provides linear motion… like a…
- Indoor Air Quality – IAQ 100%
How Safe Is Your Indoor Air Quality?
The ASHRAE Study recites for non-healthcare buildings… “Increase outdoor air ventilation (disable demand-controlled ventilation and open outdoor air dampers to 100% as indoor and outdoor conditions permit)”, and “Keep systems running longer hours (24/7 if possible)”.
- MIXING BOXES & ECONOMIZERS 100%
Siemens POL224 Controller — Essentials for HVAC Economizers
Modern HVAC ventilation and economizer strategies require smarter, more connected controls. The Siemens POL224 (also marketed as Climatix ECO) controller is one of the advanced options on the market—offering improved diagnostics, network communication, flexible I/O,...
Economizer Types Defined
Economizers are essential mechanical components used to improve HVAC system efficiency by regulating the balance of return air and outside air. They help meet ventilation standards, reduce mechanical cooling demands, and lower overall energy consumption. Depending on...
- POWER EXHAUST 100%
What Is a Power Exhaust?
A Power Exhaust is an active, motorized fan system designed to remove return air from the building at controlled volumes. Unlike passive barometric dampers, Power Exhaust systems: Actively move air out of the building Respond to changes in outside air intake Prevent...
