HVAC Designing course (Beginner to Advance Level )

Discover hvac basics, including heating, ventilation, and air conditioning, and how it provides thermal comfort and indoor air quality in large buildings through thermodynamics, fluid mechanics, and heat transfer.

Learn the five hvac goals—temperature control through heating and cooling, fresh air circulation, air filtration, efficiency, and noise control—plus summer and winter ranges for temperature, humidity, and airflow.

Explore the coefficient of performance (COP) for heat pumps, refrigerators, and air conditioning systems as the ratio of useful heating or cooling to work input, with Q and W defined.

Learn basics of heat transfer and its role in HVAC heating and cooling load calculations. Explore conduction, convection, and radiation and how heat moves from high to low temperatures.

human comfort refers to the conditions where most people feel comfortable enough to work, determined by temperature, humidity, air movement, fresh air, indoor air quality, noise, lighting, and furniture.

Identify factors driving room heat gain and cooling load, including roof, walls, windows, floors, equipment, lighting, and infiltration, and differentiate sensible and latent heat in conduction, convection, and radiation processes.

Learn to calculate cooling load through external walls by applying conduction heat transfer using u, a, and cltd corrected for latitude and month, with ta and tr for design day.

Compute the cooling load of a south-facing Pittsburgh wall using u value, cltd, and lm, with brick, insulation, and concrete, for interior 77 f and outside conditions.

Explore psychometrics as the science of the thermodynamic properties of moist air. Learn how the psychometric chart visualizes dew point, humidity ratio, and temperatures to analyze air quality and properties.

Learn psychometric properties in HVAC: dry bulb and wet bulb temperatures, enthalpy in BTU per pound of dry air, and relative humidity on the psychometric chart.

Learn absolute humidity, or humidity ratio, as water vapor per pound of dry air. Understand dew point, where moisture condenses, and specific volume, the volume per unit weight of air.

Explore how to read a psychometric chart to determine relative humidity, dry bulb temperature, specific volume, enthalpy, wet bulb temperature, and humidity ratio for HVAC design.

Learn mixing by combining fresh and return air with psychometric analysis to predict mixed air, including dry bulb temperature and relative humidity, yielding 98°F and 26.1% RH at 10,000 CFM.

Apply psychometric analysis to select a cooling coil using fresh air CFM, defining dry-bulb temperature and relative humidity, and balancing latent and sensible energy to meet on-coil conditions.

Analyze evaporative cooling with psychrometric analysis, showing how adding water vapor lowers air temperature and yields fresh air through a spray-pump system, with cooling effectiveness around 91.5%.

Analyze winter conditions using outdoor air at -32 f and 50% relative humidity for a 6000 cfm system, then apply heating and humidification to reach 75 f and 40–60% RH.

Explain how room air distribution devices, or GRD (grills, registers, and diffusers), control temperature within ±2°F of the design temperature and maintain occupied-space air velocity between 25 and 70 fpm.

Diffusers provide even, gentle air distribution for supply and return, while grills serve as wall covers for air in and out and resistors use dampers to regulate airflow.

Explore the ducting system that transports air and gases through buildings, a key component of hvac and air distribution systems, ensuring efficient, controlled movement of air throughout spaces.

Discuss two general rules for duct design. Convey the duct directly to save space, power, and material, and avoid sudden changes by using turning vanes to reduce pressure loss.

Learn about five duct categories: supply, return, exhaust, fresh air, and mixed air, and how they move air between a conditioned space and the heating or cooling system.

Identify the five duct categories—supply, return, exhaust, fresh air, and mixed air ducts—and explain how each transfers air between the heating or cooling system, conditioned space, and outdoor environment.

Explore copper ducts, a metallic option with high heat tolerance for chemical exhaust and ornamental duct work; carbon steel or black iron ducts resist high temperatures and UV.

Explore non-metallic ducts: frp fiberglass for underground chemical exhaust with insulation and sound control; fabric/textile ducts for hygienic food and pharmacy use; pvc and flex ducts offer lightweight with limits.