Heating, ventilation, and air conditioning (HVAC) is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. Its goal is to provide thermal comfort and acceptable indoor air quality. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer. "Refrigeration" is sometimes added to the field's abbreviation as HVAC&R or HVACR, or "ventilation" is dropped, as in HACR.
Ventilation is the intentional introduction of outdoor air into a space. Ventilation is mainly used to control indoor air quality by diluting and displacing indoor pollutants; it can also be used to control indoor temperature, humidity, and air motion to benefit thermal comfort, satisfaction with other aspects of the indoor environment, or other objectives.
The Institution of Engineering and Technology (IET) is a multidisciplinary professional engineering institution. The IET was formed in 2006 from two separate institutions: the Institution of Electrical Engineers (IEE), dating back to 1871, and the Institution of Incorporated Engineers (IIE) dating back to 1884. Its worldwide membership is currently in excess of 158,000 in 153 countries. The IET's main offices are in Savoy Place in London, England, and at Michael Faraday House in Stevenage, England.
The Engineering Council is the UK's regulatory authority for registration of Chartered and Incorporated engineers and engineering technician. The Engineering Council holds the national registers of over 228,000 Engineering Technicians (EngTech), Incorporated Engineers (IEng), Chartered Engineers (CEng) and Information and Communications Technology Technicians (ICTTech). The Engineering Council is also responsible for establishing and upholding globally acknowledged benchmarks of professional competence and ethical conduct, which govern the award and retention of these titles. This guarantees that employers, government bodies, and the broader society, both within the UK and abroad, can place their trust in the expertise, experience, and dedication of engineers and technicians who are professionally registered with the Engineering Council.
Building science is the science and technology-driven collection of knowledge in order to provide better indoor environmental quality (IEQ), energy-efficient built environments, and occupant comfort and satisfaction. Building physics, architectural science, and applied physics are terms used for the knowledge domain that overlaps with building science. In building science, the methods used in natural and hard sciences are widely applied, which may include controlled and quasi-experiments, randomized control, physical measurements, remote sensing, and simulations. On the other hand, methods from social and soft sciences, such as case study, interviews & focus group, observational method, surveys, and experience sampling, are also widely used in building science to understand occupant satisfaction, comfort, and experiences by acquiring qualitative data. One of the recent trends in building science is a combination of the two different methods. For instance, it is widely known that occupants' thermal sensation and comfort may vary depending on their sex, age, emotion, experiences, etc. even in the same indoor environment. Despite the advancement in data extraction and collection technology in building science, objective measurements alone can hardly represent occupants' state of mind such as comfort and preference. Therefore, researchers are trying to measure both physical contexts and understand human responses to figure out complex interrelationships.
Building performance is an attribute of a building that expresses how well that building carries out its functions. It may also relate to the performance of the building construction process. Categories of building performance are quality, resource savings and workload capacity. The performance of a building depends on the response of the building to an external load or shock. Building performance plays an important role in architecture, building services engineering, building regulation, architectural engineering and construction management. Furthermore, improving building performance is important for addressing climate change, since buildings account for 30% of global energy consumption, resulting in 27% of global greenhouse gas emissions. Prominent building performance aspects are energy efficiency, occupant comfort, indoor air quality and daylighting.
Building services engineering (BSE) is a professional engineering discipline that strives to achieve a safe and comfortable indoor environment whilst minimizing the environmental impact of a building.
In the United Kingdom, a Chartered Engineer (CEng) is an engineer registered with the UK's regulatory body for the engineering profession, the Engineering Council. Chartered Engineers are master's degree qualified or can demonstrate equivalent work-based learning and have gained the appropriate professional competencies through education and working experience. Demonstration of competence is defined in the UK Standard for Professional Engineering Competence, assessed through professional review of academic qualifications and professional development. Formal, non-formal and informal learning can be assessed. The title Chartered Engineer is protected in the UK under law by means of the Engineering Council’s Royal Charter and Bye-laws. As of 2019 there are approximately 180,000 engineers registered as a Chartered Engineer. Chartered Engineers are registered through Professional Engineering Institutions (PEIs) licensed by the Engineering Council which are relevant to their industry or specialism.
Chartered Physicist (CPhys) is a chartered status and a professional qualification for physicists awarded by the Institute of Physics. It is denoted by the postnominals "CPhys".
BSRIA is a UK-based testing, instrumentation, research and consultancy organisation, providing specialist services in construction and building services engineering. It is a not-for-profit, member-based association, with over 650 member companies; related services are delivered by a trading company, BSRIA Limited. Any profits made are invested in its research programme, producing best practice guidance.
A chartered professional is a person who has gained a specific level of skill or competence in a particular field of work, which has been recognised by the award of a formal credential by a relevant professional organization. Chartered status is considered a mark of professional competency, and is awarded mainly by chartered professional bodies and learned societies. Common in Britain, it is also used in Ireland, the United States and the Commonwealth, and has been adopted by organizations around the world.
Thermal destratification is the process of mixing the internal air in a building to eliminate stratified layers and achieve temperature equalization throughout the building envelope.
The Building Engineering Services Association (BESA), until 2012 the Heating and Ventilating Contractors' Association, and from then until 2016, B&ES, is the main UK trade association for companies that design, install, commission and maintain heating, ventilation, air conditioning, refrigeration (HVACR) and related engineering projects.
A dedicated outdoor air system (DOAS) is a type of heating, ventilation and air-conditioning (HVAC) system that consists of two parallel systems: a dedicated system for delivering outdoor air ventilation that handles both the latent and sensible loads of conditioning the ventilation air, and a parallel system to handle the loads generated by indoor/process sources and those that pass through the building enclosure.
United States building energy codes are a subset of building codes that set minimum requirements for energy-efficient design and construction for new and renovated buildings. The intent of these energy codes is to moderate and reduce energy use and emissions throughout the lifetime of a building. Energy code provisions may include various aspects of building design and construction, such as: HVAC systems, building envelope, electrical, and lighting systems. There are building energy codes for both commercial and residential buildings. However, just as the United States does not have a national building code, it also does not have a national building energy code; rather, state, and local governments choose to adopt—and potentially revise—national model energy codes and standards. Consequently, building energy codes, and building codes in general, vary between states and jurisdictions.
The American Society of Heating, Refrigerating and Air-Conditioning Engineers is an American professional association seeking to advance heating, ventilation, air conditioning and refrigeration (HVAC&R) systems design and construction. ASHRAE has over 50,000 members in more than 130 countries worldwide.
Building performance simulation (BPS) is the replication of aspects of building performance using a computer-based, mathematical model created on the basis of fundamental physical principles and sound engineering practice. The objective of building performance simulation is the quantification of aspects of building performance which are relevant to the design, construction, operation and control of buildings. Building performance simulation has various sub-domains; most prominent are thermal simulation, lighting simulation, acoustical simulation and air flow simulation. Most building performance simulation is based on the use of bespoke simulation software. Building performance simulation itself is a field within the wider realm of scientific computing.
Professor Tadj Oreszczyn FCIBSE, MInstE, PhD, CEng is the Director of The Bartlett School of Environment, Energy and Resources, and Director of the RCUK Centre for Energy Epidemiology. He is also Professor of Energy and Environment at the UCL Energy Institute, University College London.
Catherine Jane Noakes is a British mechanical engineer who is Professor of Environmental Engineering for Buildings at the University of Leeds. Noakes specialises in airborne infections and the transport of airborne pathogens. During the COVID-19 pandemic, Noakes served on the Government of the United Kingdom Scientific Advisory Group for Emergencies (SAGE).
Ken Parsons is an English engineer, now emeritus professor of environmental ergonomics at Loughborough University.
