Ask The HvacMan
Air Grilles
Air Diffusers
Air Quailty
All Air Systems
All Water Systems
Boilers
Building .Managament Systems ..BMS
Burners
Chillers
Cooling Towers
Cooling Load Calculation
Cryogenics
Energy Saving
Duct
Duct ,Smacna
Dampers ,Air
Dust Collection
Fans
Fire Dampers
Glass Selection
Heating
Heat Exchangers,water
Heat Recovery
Heat Tracing Systems
Hepa Filters
Hvac Applications
Humidifiers / Dehumidifiers
Insulation , Duct
Insulation , Pipe
Insulation , Sound
Nano Tech.,In Building
Occupancy Sensors
Pneumatic Conveying
Piping
Pool Ventilation
Process Piping
Psychrometry
Pumps
Radiant Heating
Refrigerant Systems
Solar Collectors
Sound
Steam Generation
Tables & Charts Gnr.
VAV Sytems
Valves
Ventilation
VRV Systems
STORE
Solar Collectors
Flat Plate Collectors
Evacuated Tube Collectors
Concentrating Collectors
Transpired Collectors
Solar Control Systems
Standalone Systems
Grid Connected Systems
Hybrid Systems
Back-up Systems
Solar Cells
Solar Arrays
Inverters
Change Controller
Turbines
Hybrid Systems
Grid Systems
Water Pumping
Using Wind Energy
Enviromental Aspects
Buyer's Guide
 
Save Energy
Solar Water Heating
Solar Electric Systems
Wind Turbines
Passive Solar Heating
Passive Solar Cooling
Building Material
Water Conservation
Ground Source Heat-Pumps
Green Hotels

Glass &Windows Selection

All-Air systems

There are Three main types Hvac Systems
Equipment and systems generally fall into three main types, all-air, all-water and all-refrigerant, however, in every case, refrigerant is used as the final cooling source or medium.

Most systems these days are also referred to as air cooled, as opposed to water cooled. That is, the final rejection of heat to external atmosphere is via air, using a dry coil and fans. Water-cooled systems use a cooling tower and if this is not properly maintained can lead to problems with legionnella or legionnaires disease.

All-Air systems
All-air systems transfer cooled or heated air from a central plant via ducting, distributing air through a series of grilles or diffusers to the room or rooms being served. It normally comprises the cheapest equipment cost, but is not necessarily easy or cheap to install in a building due to the size of ducting required and the cost to install. It can be a problem to control temperature properly, and the system may be energy inefficient. All-air is generally rated in second place compared to other systems in relation to the amount of energy used to achieve the desired result.

 

 

 
Google
 
Web www.iklim.com
  Discuss on the Message Board
   
 
  http://www.iklimnet.com
 
Hotels
Enviroment
Legionnare Disease
Energy Saving
Control Software
Hotel Design Books

Hotel Design