HVAC Ravenswood Manor Chicago2018-12-07T20:51:05+00:00

HVAC Ravenswood Manor Chicago | Expert Energy Efficient System Designs

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Don’t be confused by our NY Engineers is your best option if you are looking for Full Service Heating and Air Conditioning (HVAC) Engineering Firm in Chicago Illinois. We are not only an HVAC Chicago but also a leading provider of Mechanical Engineering Engineering services throughout Ravenswood Manor Chicago. Contact us at (312) 767.6877

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Recently Hundreds of individuals have been browsing our website in search of Architectural Engineering in the Chicago area. This is due because of the following we have develop in this kind of work. However, a lot of building owners from Berkeley to Willowbrook, are not aware that NY Engineers is also a top choice for anyone in search of HVAC Contractor near Chicago, Illinois!

The quest for cost effective buildings involves cost effective HVAC system design. This can include systems for domestic water heating, architectural enclosure, HVAC, lighting, and vertical transportation. The loads for the HVAC systems can come primarily from 5 different bases including lighting (cooling), the building envelope (cooling and heating), ventilation (cooling and heating), equipment for program use (cooling) and occupancy (cooling).
The ventilation load is a function of either the machines needed in order to introduce it right into a space and control contaminant concentration or the number of folks which will fill the place. In the majority of climates from the southwestern and eastern regions of the united states, to lessen outside air flow will save energy whenever the surface air is either humid and warm or very cold.
Governing the ventilation rate will be based on occupancy which is called a kind of demand control ventilation. This is a common type of energy conservation tatic that is utilized for spaces with intermittent or crowded occupancy. Having cooling and heating loads reduced as low as possible can be accomplished through the use of a higher performance building envelope, occupancy sensors, and performance lighting that apply daylight response of lighting controls.

Chicago HVAC Engineering services versus HVAC Techs

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

Chicago HVAC engineers are definitely the individuals who watch over setting up of air conditioning systems for both commercial and residential buildings. They spend plenty of their day in offices doing advanced level management and planning of installations nevertheless they do also go to job sites every so often.

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 several of the installation work, specifically on smaller jobs. On the whole HVAC technicians do a lot more travel and might spend a lot of time changing filters, identifying leaks, doing recharges or decommissioning old and outdated systems that use old refrigerants.

HVAC engineers could have the chance to make more decisions about systems that are employed, and they would be the people that would offer assistance with probably the most sensible refrigerants and which systems would work best with a larger building. In the industry, there exists some challenge between ‘the suits’ and ‘the ones that will get their hands dirty’, but both jobs require an excellent familiarity with how air cooling does work. As of late huge crowds have been getting to the NY-Engineers.Com site looking for HVAC Chicago Show. With that said, the focus of our firm is to be the top option for anyone seeking a HVAC Firm in or near Chicago and or any of our other services including Architectural Engineering Engineering services. We ask that anyone searching for more info about our Heating and Air Conditioning (HVAC) Engineering Firm in Chicago Illinois takes a look at our blog…

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Architectural Engineers Detail Ventilation System Configurations

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Human activity generates a broad range of compounds that become dangerous in high-enough concentrations, and pollutants from outdoor sources can also degrade indoor air quality. Architectural engineers are often charged with the job of preventing this from occurring as much as possible.

Ventilation systems keep these substances at low levels by constantly renewing indoor air, and they also contribute to keeping moisture within the range of 30 to 60 percent as recommended by ASHRAE. Without ventilation, it would not be possible to keep indoor environments comfortable and healthy.

Natural ventilation relies on wind currents, outdoor temperature and other weather conditions to supply fresh air. The advantage of natural ventilation is that it comes for free, and in new buildings it is possible to optimize architectural design to maximize its effects. However, natural ventilation is uncontrollable, and generally insufficient to fully meet the requirements of modern buildings.

Normally, to meet ASHRAE standards and local building codes, mechanical ventilation must be deployed. Depending on their configuration, whole-house ventilation systems can be classified into three main types:

  • Exhaust ventilation systems, which only use extractor fans.
  • Supply ventilation systems, which only use injector fans.
  • Balanced ventilation systems, which use both injector and extractor fans.

Balanced systems can be enhanced with energy-recovery ventilation, a technology that exchanges energy between the supply and exhaust airflows to maximize performance and minimize the overall running cost of the system.

Exhaust Ventilation Systems

As implied by their name, exhaust ventilation systems only deploy extractor fans. When the system starts to run, it creates a negative pressurization effect in occupied spaces, drawing in fresh outdoor air to renew that which is exhausted. It is important to note, however, that exhaust ventilation is not possible in air-tight buildings, since outdoor air must be allowed to leak in. If the building envelope has been tightened with caulking and weather stripping, exhaust ventilation must be complemented with intake vents.

Exhaust ventilation systems have a single set of fans and ducts, which makes them affordable while reducing their installation time and cost. Energy expenses are relatively low because there is only one set of fans in operation, and maintenance is simplified as well. The system layout can be designed to target specific areas where pollutants are generated, ensuring they are removed before they spread indoors.

Exhaust ventilation generally achieves the best results in cold and dry climates, where outdoor air does not require dehumidification. It is not recommended for tropical and mixed climates, because warm and humid outdoor air is drawn in without control, driving up cooling and dehumidification expenses. Also, keep in mind that depressurization draws air from all surrounding spaces, with little control over pollutant content. In general, architectural engineers recommend exhaust ventilation for cold weather, and when outdoor air pollution is low.

Another risk of exhaust ventilation is backdraft, which occurs when a combustion-based appliance suddenly draws in a lot of air, potentially causing a flashover. Since exhaust ventilation causes negative pressurization and does not control air supply, there is an increased chance of backdraft.

Supply Ventilation Systems

Supply ventilation only uses injector fans, pressurizing rooms and causing indoor air to leak out constantly. The main advantage of supply ventilation is control, since outdoor air can be filtered, humidified or dried as needed. In addition, the pressurization effect prevents the inflow of pollutants from surrounding spaces or from outdoors.

Another benefit of supply ventilation is that it eliminates the risk of backdraft from combustion appliances due to positive pressurization. Installation, operation and maintenance expenses are also reduced thanks to the simple system configuration.

Supply ventilation is better suited for tropical or mixed climate conditions, where dehumidification and filtering are often required. This configuration tends to cause trouble in cold weather, since the pressurization effect can cause condensation of indoor air humidity, leading to moisture accumulation and its common side-effects: furniture damage and the proliferation of mold, bacteria and dust mites.

Balanced Ventilation Systems

A balanced ventilation system is the result of combining exhaust and supply ventilation: both airflows can be controlled, providing the benefits of both system configurations. Of course, this comes at a higher installation and operation cost, since there are now two sets of fans and ducts.

Balanced ventilation is suitable for all weather conditions, and airflows can be adjusted to provide any pressurization effect as required – positive, negative or neutral. The recommended locations for each set of ducts are the following:

  • Supply ducts should focus on areas where occupants spend most of their time, including living rooms and bedrooms. This ensures that these areas always have a supply of fresh and clean air.
  • Exhaust ducts should focus on areas where moisture and humidity are released frequently, such as kitchens, bathrooms, laundries and boiler rooms.

Of course, it is possible to install supply and exhaust rooms for every room, but system costs are increased significantly. With the approach presented above, system costs are optimized without compromising performance.

Energy-Recovery Ventilation: Architectural Engineers Improve the
Efficiency of Balanced Ventilation

Energy-recovery ventilation consists on exchanging energy between the supply and exhaust air, so that overall HVAC costs are minimized. These systems can be classified into two main types:

  • Heat-Recovery Ventilation (HRV)systems only exchange heat between the supply and exhaust airflows.
  • Enthalpy-Recovery Ventilation (ERV)systems exchange both heat and moisture.

Summer Operation

In the summer, outdoor air typically requires cooling and dehumidification. However, when air is exhausted, it is still cooler and drier than the supply air; therefore, a part of the energy used for cooling and dehumidification is lost.

  • The use of a heat exchanger (HRV) can improve energy efficiency: the exhaust air is used to precool the supply air without mixing both airstreams.
  • If an ERV system is used, moisture is also transferred from the supply air to the exhaust air, further improving air-conditioning efficiency because there is less moisture to remove.

Winter Operation

During the winter, HVAC needs are reversed because outdoor air typically requires heating and humidification. The operating principle of HRV and ERV is the same, but the direction in which heat and humidity are transferred is inverted.

  • The exhaust air is warmer, and the heat exchanger captures a part of that thermal energy to preheat the supply air.
  • If ERV is used, moisture is also retrieved from the exhaust air and provided to the supply air.

General Recommendations for HRV and ERV

It is important to note that HRV and ERV systems are significantly more complex than the ventilation systems presented before. They can only be installed and serviced by qualified personnel, which increases their cost of ownership. Compared with a basic balanced ventilation system, HRV and ERV systems have a higher running cost, but overall HVAC expenses are reduced.

HRV and ERV systems increase in effectiveness where temperature  and moisture extremes are reached during the summer or winter, or when heating fuel costs are high. Their benefits are diminished under moderate weather conditions, where the added running cost may be higher than the savings achieved – balanced ventilation is a better alternative in these cases.

Spot Ventilation: A Complement for Whole-House Ventilation

Spot ventilation consists on using exhaust fans to extract pollutants and humidity at the room where they are released, preventing them from being spread throughout other indoor spaces. In residential settings, spot ventilation is most commonly used in bathrooms and kitchens to meet the minimum exhaust air levels established in both the area mechanical codes and ASHRAE standards:

  • Bathrooms require 50 cfm of intermittent ventilation or 20 cfm of continuous ventilation.
  • Kitchens require 100 cfm or intermittent ventilation or 25 cfm of continuous ventilation.

Spot ventilation can be a great complement for supply ventilation systems, removing pollutants from key areas. This combination provides many of the benefits of a balanced ventilation system without having to install a full set of exhaust fans and ducts. According to experienced architectural engineers, the only disadvantage of this combination is that HRV and ERV systems are unfeasible, since there is no point where heat or moisture can be exchanged between airflows.

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