Here are some online resources available at no charge: Engineering Manual of Automatic Control for Commercial Buildings (Honeywell, 1997) Inch-Pound Edition:

Here are some online resources available at no charge: Engineering Manual of Automatic Control for Commercial Buildings (Honeywell, 1997) Inch-Pound Edition: https://customer.honeywell.com/resources/techlit/TechLitDocuments/77-0000s/77-e1100.pdf https://customer.honeywell.com/resources/techlit/TechLitDocu... SI Edition: https://customer.honeywell.com/resources/techlit/TechLitDocuments/77-0000s/77-1200.pdf https://customer.honeywell.com/resources/techlit/TechLitDocu... Feedback Systems: An Introduction for Scientists and Engineers https://fbswiki.org/wiki/index.php/Feedback_Systems:_An_Introduction_for_Scientists_and_Engineers https://fbswiki.org/wiki/index.php/Feedback_Systems:_An_Intr... Instrumentation and Control (U.S. Department of Energy) https://sites.ntc.doe.gov/partners/tr/Training%20Textbooks/Forms/AllItems.aspx?RootFolder=%2Fpartners%2Ftr%2FTraining%20Textbooks%2F05%2DInstrumentation%20and%20Control https://sites.ntc.doe.gov/partners/tr/Training%20Textbooks/F... (This is part of a series for nuclear plant operators, but the basic principles are equally applicable in many other fields.)