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HVAC Chicago Ridge | Expert Energy Efficient System Designs

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Do not be confused by the name New York Engineers is your best bet if you seek a Full Service Heating Cooling Air Conditioning Furnace (HVAC) Engineering Firm in Chicago Illinois. We are not only an HVAC Company near Chicago but also a leading provider of Construction Engineering Engineering services in or near Chicago Ridge. Contact us at (+1) (312) 767.6877

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Lately Many individuals have been taking a look at the NY Engineers website looking for Fire Protection Engineering near the Chicago area. This is due because of the reputation we have built in this types of projects. Nevertheless, a lot of building owners from Bridgeview to Wilmette, Illinois, don’t know that NY Engineers is also the ideal choice for anyone searching for HVAC Chicago, Illinois

The search for cost effective buildings involves power efficient HVAC system design. This can include systems for architectural enclosure, domestic water heating, lighting, HVAC, and vertical transportation. The loads for your HVAC systems can come primarily from five different places including lighting (cooling), the construction envelope (cooling and heating), ventilation (cooling and heating), equipment for program use (cooling) and occupancy (cooling).
The ventilation load will be a function of either the mechanisms necessary so as to introduce it in a space and control contaminant concentration or the amount of individuals that will fill the room. In the majority of climates in the southwestern and eastern regions of america, to reduce outter air-flow helps save energy whenever the surface air is either humid and warm or very cold.
Manipulating the ventilation rate will be dependant on occupancy which is called a kind of demand control ventilation. This can be a common type of energy conservation policy which is used for spaces with irregular or dense occupancy. Having cooling and heating loads reduced to a minimum can be carried out by utilizing an increased performance building envelope, occupancy sensors, and performance lighting that uses daylight response of lighting controls.

Chicago HVAC Engineers versus HVAC Technicians

When you have ever discussed the distinction between a HVAC Engineers versus HVAC Engineers, then please read on:

Chicago HVAC engineers are definitely the people that oversee installing of air cooling systems for commercial and residential buildings. They spend a lot of their day in offices doing higher-level organization and arranging of installations but they do also see job sites from time to time.

But, HVAC technicians usually do more of the hands-on work with repair and maintenance. A HVAC technician may deal with an engineer to complete a few of the installation task, especially on smaller jobs. Generally speaking HVAC technicians do considerably more travel and could spend considerable time identifying leaks, changing filters, doing recharges or getting rid of old and outdated systems that use old refrigerants.

HVAC engineers could have the opportunity to make more decisions about systems that are being used, plus they will be the people that would offer assistance with the most sensible refrigerants and which systems would be perfect for a bigger building. In the industry, there may be some conflict between ‘the suits’ and ‘the ones that will get their hands dirty’, but the two jobs require an effective knowledge of how air conditioner is proven to work. Lately huge crowds have been browsing the New York Engineers site searching for things like HVAC Chicago. However, the goal of our organization is to be the to go to company for those searching for a HVAC Contractor in Chicago and or any of our other services including Architectural Engineering Engineering services. Furthermore everyone searching for additional information about our Heating Cooling Air Conditioning Furnace (HVAC) Engineering Firm in Chicago Illinois stops by at our blog!

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HVAC Engineering: Understanding Air Balancing in Ventilation Systems

Fire Protection Engineering Magazine

Air balancing is a fundamental design skill in HVAC engineering. Depending on the intended purpose of each building area, it may require negative, positive or neutral pressurization. This is accomplished by adjusting supply and exhaust airflows: a higher air supply causes positive pressure, while a higher air exhaust causes negative pressure.

Although the ideal scenario would be to ventilate all building areas naturally, this is not possible in practice. For example, there is no way to use natural ventilation in areas that are completely surrounded by other rooms, as well as in underground levels. The purpose of ventilation can range from human comfort to facility safety: ventilation in residential and commercial settings is focused on delivering air of breathable quality, while industrial ventilation is often deployed to keep dangerous gases away from certain areas or below a certain concentration.

Indoor spaces are subject to many airflows, and they are normally measured in cubic feet per minute (CFM). We tend to think only about the outdoor air supply and the exhaust air, but consider there is also unwanted air escape (exfiltration) and air gain (infiltration). Unwanted air flows typically occur around the edges of windows or doors.

Poorly balanced ventilation systems often lead to air quality issues, according to HVAC engineering professionals. For example, negative pressurization may draw in pollutants from above the ceiling or from outdoors, and air may rush in suddenly when a window or door is opened. 

Intake and Exhaust Air Calculation

Before air balancing calculations, it is important to know the required air supply and air exhaust. There are many valid procedures, as indicated by the following codes:

  • ASHRAE 62.1 – Ventilation for Acceptable Indoor Air Quality
  • In the case of hospitals, ASHRAE 170 – Ventilation of Health Care Facilities

The total air supply is 60 cfm, while air exhaust is 150 cfm. Since exhaust is higher by 90 cfm, the result is negative pressurization. Increasing supply to balance airflow is acceptable, since the values provided in the code are only minimum values.

Assume all intake airflows are increased to the following values, in order to prevent negative pressurization:

  • Electrical room: 25 cfm
  • Corridor: 125 cfm
  • Storage: 25 cfm

This results in a total air intake of 175 cfm, which is higher than the 150 cfm of exhaust air. This causes cellar areas to be pressurized with respect to the trash room, preventing the spread of unpleasant odours. Since the airflow must be balanced at the end, the extra 25 cfm are released by exfiltration, but trash odour is confined to its intended location.

Troubleshooting Air Balancing Issues in HVAC Engineering

If a ventilation system suffers from air balance issues, do not immediately assume the cause lies in the fans themselves. Consider that system components such as dampers can be damaged, and also that air ducts can get disconnected. When in doubt, the best recommendation is getting a professional opinion from an HVAC design engineer.

When ventilation systems are equipped with variable frequency drives for fan speed control, air balancing is simplified. VFDs can adjust the rpm of both supply and exhaust fans, to match the ventilation load while keeping airflows balanced.

HVAC engineering is a complicated matter that is best approached by engineers that have specialized in this area of expertise. 

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