Lesson 1 - Heat Energy
Heating system requirements; Heat and energy; Temperature; Sensible heat and latent heat; Heat transfer; Energy conversions; Electric motors
Learning Objectives:– Name the three main requirements of heating systems and various kinds of energy related to heating systems.
– Define terms related to the basic concepts of heating systems.
– Describe differences between standard temperature scales and explain how to convert between Fahrenheit and Celsius scales.
– State the two basic laws of heat transfer and describe the three ways heat is transferred from one location to another.
– Explain how to convert between kilowatts (kW) and brake horsepower (bhp).
– Briefly describe various kinds of single-phase motors used in heating systems.
Lesson 2 - Personal Comfort and Heat Distribution Systems
Personal comfort; Humidity; Humidifiers; Heat delivery systems; Forced-air furnaces; Heat pumps; Hot water heating systems; Room heating panels
Learning Objectives:– Discuss the effects of temperature, humidity, and air velocity on personal comfort.
– Describe various kinds of humidifiers used in furnaces.
– Describe the basic operation of a forced-air furnace.
– Discuss the use of heat pumps.
– Explain the main difference between forced-air and hot water (hydronic) heating units.
– Describe the basic operation of floor, wall, and ceiling heating panels.
Lesson 3 - Combustion
Combustion facts; Combustion reactions; Heating value; Compensation for altitude; Fuel classification; Solid, liquid, gaseous fuels; Thermal efficiency; Combustion products as pollutants
Learning Objectives:– Define combustion and describe what happens to the fuel and oxygen supplied during the process.
– Describe characteristics of stoichiometric combustion and discuss problems associated with incomplete combustion.
– Define the terms ignition temperature, upper and lower flammability or explosive limits, higher and lower heating values, and flash point.
– Discuss the general differences between solid, liquid, and gaseous fuels and describe their characteristics.
– Explain how thermal efficiency applies to heating systems.
Lesson 4 - Chimneys and Venting
Chimney and gas venting terminology; Need for combustion air; Draft control methods; Basic chimney requirements, operation factors; Gas, oil-fired furnace venting; Fireplace chimneys; Vent and chimney accessories
Learning Objectives:– Define terms related to chimneys and venting.
– Describe several methods of draft control used on chimneys.
– Discuss factors that affect chimney operation.
– Discuss the relationship between chimney height and draft and explain why correction factors may be needed.
– Discuss the basics of gas furnace venting and oil furnace venting.
– Discuss the general principles affecting the operation of fireplaces and their chimneys.
Lesson 5 - Forced-Air Duct Systems
Duct system basics; Forced-air system components; Supply outlets; Duct dampers; Damper motors and actuators; Blowers (fans); Duct system pressure, integrity, design
Learning Objectives:– Describe the various components of the duct system and explain why centrifugal blowers are preferred within the system.
– Discuss pressure variations within the duct system and explain how manometers and pitot tubes are used to measure pressure.
– Discuss the importance of duct system integrity as it relates to system efficiency and name factors that contribute to this integrity.
– Describe typical duct system designs and explain how the equal friction method is used.