Menu Close

What are the types of AHU?

Admin

What are the types of AHU?

What is an Air Handling Unit (AHU)?

  • Terminal units: Include only an air filter, coil and blower.
  • Makeup air units: Larger air handler that conditions 100% outside air, rather than recirculated air.
  • Rooftop units: Air handler designed for outdoor use and are positioned on roofs.

What is HVAC classified?

HVAC systems can be classified into central and local systems according to multiple zones, location, and distribution. Primary HVAC equipment includes heating equipment, ventilation equipment, and cooling or air-conditioning equipment. Central HVAC systems contain all-air, air-water, all-water systems.

How do you determine AHU capacity?

Typical AHU requires a flow rate of 2.4 gallons/ton. So, the flow rate should be 24 gpm for the AHU capacity of 10 TR. A typical AHU will have a Δt of 10° F, hence we assumed the AHU coil outlet temperature as 54° F. Refer water system cooling load calculations for formulae and derivations.

What is the typical basic design of an AHU?

These are the basic components in an AHU: Fans, Coils, Filters, Heaters, Humidifiers, Dampers, Mixers, and Enthalpy/Desiccant Wheels. There are other fixtures in an AHU for controls purposes, but basically these are the components you will see on most AHUs.

How many types of AHU are there in HVAC?

There are basically two types of air handling unit that are in used and they are the “Draw-Through” or “Blow-Through”. In the Draw-Through type, the fan pulls the air through the mixing box, filters and cooling coil before discharging it from the fan outlet to the space to be conditioned or to the ducting network.

How many types of FCU are there?

There are four types of fan coil units (FCUs); horizontal chassis above a ceiling void, horizontal exposed, underfloor and vertical wall mounted units.

How many types of HVAC are there?

four
There are four main types of HVAC systems. There are split systems, hybrid systems, duct-free systems, and packaged heating and air systems.

How do you calculate BTU for Ahu?

To measure heating Btu, multiply the measure supply airflow (in cfm) by the temperature change from the average supply register temperature to the average return grille temperature, and multiply this total by the formula constant of 1.08.

How do you determine Ahu tonnage?

  1. Step 1: Calculate Square Footage. Determine the square footage of the area to be cooled.
  2. Step 2: Multiply to Get BTU Value. Multiply the square footage by 25 to obtain the base BTU value.
  3. Step 3: Divide by 12,000. Determine the estimated tonnage by dividing the total BTUs by 12,000.

What is difference between AHU and HVAC?

AHU, which is Air Handling Unit is an appliance used to circulate air. HVAC is Heating, Ventilating and Air Conditioning system. HVAC is the central unit to which AHU is connected. AHU is only a part of HVAC and as such there is hardly any difference between then two.

What is the difference between AHU and chiller?

Both perform the same function, which is usually to generate cold water for the air conditioning by removing the unwanted heat away from the building. The only difference is the way that the chiller discards the heat.