HVAC Equipments and System

ASHRAE Standard 90.1 (Energy Standard For Buildings Except Low-Rise Residential Buildings) defines Heating Ventilating and Air-Conditioning System (HVAC) for the building except low rise. Below figure taken from learnhvac.org and it shows the typical equipment used in HVAC systems. For beginner, http://www.learnhvac.org/ is very meaningful and can understand the operation of HVAC system in buildings. 


The basic purpose of installing HVAC system in building is to provide desirable indoor thermal comfort conditions to building occupant. HVAC system maintain the Indoor Air Quality (IAQ) level by mixing the fresh air into the zoned recirculated air. Sometimes, due to high occupancy indoor air get polluted and thus it is also maintained by providing more fresh air than designed. Better indoor thermal comfort improves the productivity of the occupants.

Below is the equipment list of HVAC system
   1. Compressor,
   2. Condenser
   3. Evaporator 
   4. Expansion value
   5. Cooling Tower (Heat Rejection Device)
   6. Pump

 List of HVAC equipments that include - 

1.Unitary Air Conditioners 

2.Unitary and Applied Heat Pumps

3.Water Chilling Packages

4.Packaged Terminal Air Conditioners, Packaged Terminal Heat Pumps, Single-Package Vertical Air              Conditioners, Single-Package Vertical Heat Pumps, Room Air Conditioners, and Room Air-Conditioner      Heat Pumps

5.Warm-Air Furnaces and Combination Warm-Air Furnaces/Air-Conditioning Units, Warm-Air Duct              Furnaces, and Unit Heaters

6.Gas- and Oil-Fired Boilers

7.Heat Rejection Equipment

Followings are the Standard related to HVAC (Heating Ventilating and Air-Conditioning) system guidelines 

1. ASHRAE Standard 90.1



2. ASHRAE Standard 62.1

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