HVAC System Design

Air conditioners are designed to remove moisture from air [dehumidification] for human comfort. So they often drip water. But excessive water leakage may be due to some problem with the machine. Let us have a look at the possible causes: Clogged condensate drain pipe The excess moisture removed from the air is drained to approved receptor through condensate drain pipes. Clogging in these pipes result on the back flow of water to the unit and the condensate drain pan under the evaporator coil overflows. When this happens the water will drip from the air terminal points. Damaged condensate pump Some air conditioner units like cassette units have in-built condensate pump. Any damage to these pumps result in the overflow of condensate and dripping. Dirty air filter Air filter is a component in air conditioner which required periodic cleaning, maintenance and replacement. Evaporator coils are designed to operate between a minimum and maximum airflow ranges. But a clogged air filter may caus

Fire-fighting pipe sizer A simple tool created for calculating fire fighting pipe sizes. This tool can be utilized to size pipes based on hazard type and number of sprinklers. Please find the download link above. Disclaimer: Owner of this blog is not responsible for losses incurred due to unintended use of this tool.

Louver Size calculator Download louver size calculator tool creates using excel file from above. This tool can be used to calculate louver sizes according to the airflow, velocity and free area inputs. IP units are followed in the tool. Disclaimer: Owner of this blog is not responsible for losses incured due to unintended use of this tool.

A VAV system enables a single RTU to supply air to different zones with different cooling demands. The RTU provides air at a constant temperature. But the airflow will vary depending on the air pressure in the supply air duct. VAV terminal boxes placed downstream of RTU in the corresponding zones will control the zone temperature by modulating the airflow based on the input from a zone temperature sensor. A VAV system comprises the following:- Rooftop unit with an RTU controller controlling supply air temperature and supply duct static pressure. A VAV terminal box with direct digital control(DDC). SELECTING ROOF-TOP UNIT (RTU) RTU should have external static pressure (ESP) of atleast 2 in. wg. This ensures that each VAV terminal box receives sufficient airflow at the right air pressure to deliver the maximum design airflow to the zone. The supply air temperature/leaving air temperature should be constant at 55°F. Entering air temperature for cooling should be mix-air temperature for sy

HVAC (Heating, Ventilation, and Air Conditioning) is a crucial part of any building's infrastructure, and its design can greatly impact the comfort, health, and energy efficiency of its occupants. In this article, we'll take a look at the basics of HVAC system design and why it's so important. What is HVAC System Design? HVAC system design involves the planning and creation of a heating, ventilation, and air conditioning system for a building. This includes the selection of appropriate equipment, the calculation of heating and cooling loads, the design of ductwork and piping systems, and the integration of controls and monitoring systems. Why is HVAC System Design Important? HVAC system design is important for several reasons: Comfort: A well-designed HVAC system ensures that the indoor temperature, humidity, and air quality are maintained at comfortable levels. Health: Good ventilation helps to prevent the buildup of indoor air pollutants and helps to reduce the risk of in