Heating, Ventilation & Air Conditioning/Refrigeration

Online courses and video lectures from 25 universities, including Yale, Princeton, Harvard, Stanford, and MIT.

Created by experts, Khan Academy’s library of trusted, standards-aligned practice and lessons covers math K-12 through early college, grammar, science, history, AP®, SAT®, and more. It’s all free for learners and teachers.

Web-based publication of virtually all MIT course content, open and available to the world and a permanent MIT activity.

Teaching and learning materials that you may freely use and reuse at no cost.

Mission is to accelerate the democratization of education for all through open educational services and resources enabling individuals, communities, educational institutions, organizations, and businesses to prepare people for successful employment in the 21^st century.

Open educational resources from leading colleges and universities.

Information pertaining to building and remodeling energy efficient dwellings.

Introduction to refrigeration systems.

Simplifies the complex world of sustainable design, construction, and operations.

Tutorials and quizzes on basic topics of thermodynamics.

Concept of refrigeration and its applications.

Free textbook offered by BookBoon.

Document on the general areas of competence required for residential energy auditors.