AMCA Learning & Credentialing Center

The performance of a fan is defined by the flow, fan pressure, and power draw of the fan. The fan affinity laws (also called the fan laws for short) are a set of inter-related equations that predict the performance of the fan under varying designs and conditions. For example, from a fan applications perspective, some fan laws dictate how the performance of the fan will vary if we change the density, or the rotational speed of the fan. From a fan design perspective, other fan laws can predict the change in performance due to changes in impeller diameter or size. Yet another even predicts the change in the noise generated by the fan. In this self-guided course, you will apply a simplified set of affinity laws to predict fan performance changes due to changes in rotational speed and changes in density compared to catalog conditions. In high-pressure systems (over 3000 Pa or 12 in w.g.) the compressibility factor must be calculated. Usually when the rotational speed or density changes, the compressibility factor also changes. In this course changes to the compressibility factor are fully considered, and a method from AMCA publication 210 for calculating the compressibility factor is presented. Included are .PDF course notes that are handy for future reference, and make it easier for you to follow along, especially if English is not your first language. Includes fan compressibility spreadsheet calculator. Includes IP - SI spreadsheet calculator for unit conversion. You can leave the course and the system will save your progress for when you come back. Explore or re-visit topics in the sequence you desire. Learning activities and quiz questions keep you engaged in the topics. SI units only. Instructor: Ron Wroblewski  Course length: 60 minutes  PDH credits: 1 Read more

The performance of a fan is defined by the flow, fan pressure, and power draw of the fan. The fan affinity laws (also called the fan laws for short) are a set of inter-related equations that predict the performance of the fan under varying designs and conditions. For example, from a fan applications perspective some fan laws dictate how the performance of the fan will vary if we change the density, or the rotational speed of the fan. From a fan design perspective other fan laws can predict the change in performance due to changes in impeller diameter or size. Yet another will predict the change in the noise generated by the fan. In this introductory self-guided fan applications engineering course, you will apply a simplified set of affinity laws to predict fan performance changes due to changes in rotational speed and changes in density compared to published catalog performance. In this course changes to the compressibility factor are not taken into consideration. See FSO225 Advanced Affinity Laws for high-pressure systems where the compressibility factor cannot be ignored. Includes pdf course notes that are handy for future reference, and make it easier for you to follow along, especially if English is not your first language. Includes IP - SI spreadsheet calculator for unit conversion. You can leave the course and the system will save your progress for when you come back. Explore or re-visit topics in the sequence you desire. Learning activities and quiz questions keep you engaged in the topics. SI units only. Allow at least 45 minutes in your schedule for completing this course. Instructor: Ron Wroblewski  Course length: 60 minutes  PDH credits: 1 Read more

The fan power law defines the fundamental engineering relationship between four key indicators of fan performance: fan flow rate; fan static (or total) pressure, fan power, and fan static (or total) efficiency. In this self-guided course, you will work with the elements of the fan power law equation and explore how they interact. You will also practice calculating the compressibility factor and the fan electrical and mechanical power. Includes pdf course notes that are handy for future reference, and make it easier for you to follow along, especially if English is not your first language. Includes IP - SI spreadsheet calculator for unit conversion. You can leave the course and the system will save your progress for when you come back. Explore or re-visit topics in the sequence you desire. Learning activities and quiz questions keep you engaged in the topics. SI units only. Allow at least 1 hour 15 minutes in your schedule for completing this course. Instructor: Ron Wroblewski  Course length: 75 minutes  PDH credits: 1.25 Read more

At a given rotational speed and fan pressure, centrifugal fans will develop a constant volume of airflow. Due to uncertainties in the final layout and construction of the ductwork, combined with the prospect of critical or changing process needs, many fans are selected to deliver more pressure and flow than what the industrial process or air-conditioning system actually requires. Some sort of control must then be employed to reduce the airflow to the desired level. In this self-guided course, you will explore common methods used for varying the flow capacity of the fan, such as speed control, outlet dampers, inlet dampers and inlet vane control. Your knowledge of these methods will allow you to accurately estimate and compare the power among the different methods. With this skill you can accurately predict the possible savings of changing to a more efficient method. Includes pdf course notes that are handy for future reference, and make it easier for you to follow along, especially if English is not your first language. Explore or re-visit topics in the sequence you desire. Learning activities and quiz questions keep you engaged in the topics. SI and IP units. Includes IP - SI spreadsheet calculator for unit conversion. Allow at least 2 hours in your schedule for completing this course. You can leave the course and the system will save your progress for when you come back.   Instructor: Ron Wroblewski  Course length: 2 hours  PDH credits: 2   Read more

Psychrometrics is the study of the properties of mixtures of air and water vapor. A general knowledge of psychrometrics is very useful in fan application engineering, mainly because the performance of the fan is directly related to the density of the gas. Knowledge of psychrometric principles allows the fan application engineer to measure the amount of water vapor in the air, determine the density of the mixture, and thus accurately predict changes in fan performance. In this self-guided course, you will graphically explore psychrometric properties, such as dry bulb, wet-bulb, relative humidity, dew point, and humidity ratio as they are plotted on the psychrometric chart. Your knowledge of these properties will allow you to accurately calculate density and give you other skills useful in fan application engineering, such as the ability to predict whether condensation will occur in the system. Includes pdf course notes that are handy for future reference, and make it easier for you to follow along, especially if English is not your first language Includes IP - SI spreadsheet calculator for unit conversion You can leave the course and the system will save your progress for when you come back. Explore or re-visit topics in the sequence you desire Learning activities and quiz questions keep you engaged in the topics SI units only Allow at least 2 hours in your schedule for completing this course. Instructor: Ron Wroblewski  Course length: 2 hours  PDH credits: 2   Read more

This module navigates the evolving landscape of fan-efficiency codes and regulations, breaking down the complex changes happening at both the federal and state levels. Learners will explore the milestones of US federal fan regulations, proposed updates to model energy codes, and the ongoing regulation unification project. A central focus of this course is understanding the critical importance of third-party certifications, such as the Fan Energy Index (FEI), to ensure compliance with federal test procedures that have been effective since October 2023. This module equips professionals with the precise specification language needed to advocate for certified, legally compliant fan ratings in commercial building projects. Instructors: Michael Ivanovic, Brittany Swan PDH: 0 Read more