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Feedback control method to maintain indoor air quality
Demand controlled ventilation (DCV) is a feedback control method to maintain indoor air quality that automatically adjusts the ventilation rate provided
Demand_controlled_ventilation
Technology of indoor and vehicular environmental comfort
to move the air by a third. Demand-controlled kitchen ventilation (DCKV) is a building controls approach to controlling the volume of kitchen exhaust
Heating, ventilation, and air conditioning
Heating,_ventilation,_and_air_conditioning
Intentional introduction of outside air into a space
ventilation Displacement ventilation Dedicated subaerial air supply Demand-controlled ventilation (DCV, also known as Demand Control Ventilation) makes it possible
Ventilation_(architecture)
Treatment of air from kitchens
Kitchen ventilation is the branch of ventilation specialising in the treatment of air from kitchens. It addresses the problems of grease, smoke and odours
Kitchen_ventilation
Instrument for the measurement of carbon dioxide gas
determines how many people are in a room, and ventilation can be adjusted accordingly. See demand controlled ventilation (DCV). Exhaust gas analyzer Oxygen sensor
Carbon_dioxide_sensor
Movement of air through a building
Cross ventilation is a natural phenomenon where wind enters an opening, such as a window, flows directly through the space, and exits through an opening
Cross_ventilation
Method of reusing thermal energy in a building
Heat recovery ventilation (HRV), also known as mechanical ventilation heat recovery (MVHR) is a ventilation system that recovers energy by operating between
Heat_recovery_ventilation
Control system for heating, ventilation, and air conditioning equipment
HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system
HVAC_control_system
Pressure exerted by molecules of water vapor in gaseous form
Coolant Cross ventilation Dedicated outdoor air system (DOAS) Deep water source cooling Demand controlled ventilation (DCV) Displacement ventilation District
Vapour_pressure_of_water
Chemistry concept
the equation can be used to calculate the time required at a certain ventilation rate to reduce a high carbon monoxide concentration in a room. D t =
Dilution_(equation)
Tank used in hot water systems
Coolant Cross ventilation Dedicated outdoor air system (DOAS) Deep water source cooling Demand controlled ventilation (DCV) Displacement ventilation District
Expansion_tank
Ventilation without use of mechanical systems
types of natural ventilation occurring in buildings: wind driven ventilation and buoyancy-driven ventilation. Wind driven ventilation arises from the different
Passive_ventilation
Subfields of building design and construction
the control of environmental factors (psychrometrics), either for human comfort or for the operation of machines. Heating, cooling, ventilation and exhaustion
Mechanical, electrical, and plumbing
Mechanical,_electrical,_and_plumbing
Engineering discipline
for the frame and engine. Fluid mechanics might be used to design a ventilation system for the vehicle (see HVAC), or to design the intake system for
Mechanical_engineering
Delivery of chilled water to building needing cooling
parisien: Une alimentation renforcée grâce au stockage de glace. Chauffage, ventilation, conditionnement d'air, (847), 9-11 (notice Inist-CNRS Archived 2014-09-03
District_cooling
Range of indoor air temperatures preferred by most people
pharmaceuticals, the United States Pharmacopeia-National Formulary (USP-NF) defines controlled room temperature as between 20 and 25 °C (68 and 77 °F), with excursions
Room_temperature
Device to detect the presence or absence of gases
dioxide sensors are being installed into buildings as part of demand-controlled ventilation systems. Sophisticated gas sensor systems are being researched
Gas_detector
Temperature control system
thermostatically controlled loads (TCLs). Thermostatically controlled loads comprise roughly 50% of the overall electricity demand in the United States
Thermostat
Efficiency standard of air filters
which is the measured air speed at an inlet or outlet of a heating ventilation and air conditioning (HVAC) system. Face velocity is measured in m/s
HEPA
Component of air conditioning and refrigeration systems
does not react to temperature, such as a capillary tube or a pressure-controlled valve. A thermal expansion valve is a key element to a heat pump; this
Thermal_expansion_valve
System that transfers heat from one space to another
extract heat from the exhaust air of a building and require mechanical ventilation. Two classes exist: Exhaust air-air heat pumps transfer heat to intake
Heat_pump
Air conditioning technology
drive to control the compressor motor speed to modulate cooling capacity. Capacity modulation is a way to match cooling capacity to cooling demand to application
Inverter_compressor
Cooling of air in an enclosed space
a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC). Heat pumps are similar in many ways to
Air_conditioning
Ventilation using solar energy
referred to as a thermal chimney – is a way of improving the natural ventilation of buildings by using convection of air heated by passive solar energy
Solar_chimney
Type of home appliance that clears smoke from a stove
brass, heat-resistant plastics, and more. NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking says that mesh filters
Kitchen_hood
Measure of the air volume added to or removed from a space
existing air is replaced. The actual amount of air changed in a well mixed ventilation scenario will be 63.2% after 1 hour and 1 ACH. In order to achieve equilibrium
Air_changes_per_hour
Machine used to produce air flow
annual cost. Some have humidity sensors to control trickle operation. They have the advantage of ensuring ventilation and preventing the build-up of humidity
Fan_(machine)
Passive solar building
highest energy in the world and most of the energy is used for heating, ventilation and air conditioning systems. For these reasons, today's buildings are
Trombe_wall
Physics of heat, work, and temperature
Coolant Cross ventilation Dedicated outdoor air system (DOAS) Deep water source cooling Demand controlled ventilation (DCV) Displacement ventilation District
Thermodynamics
Standards organization
Coolant Cross ventilation Dedicated outdoor air system (DOAS) Deep water source cooling Demand controlled ventilation (DCV) Displacement ventilation District
ASTM_International
Architectural element for creating a draft
century, the early 21st century saw them used again to increase ventilation and cut power demand for air-conditioning. Generally, the cost of construction for
Windcatcher
Interior fungal growth
produced is not able to escape the building via ventilation. Residential mold may be prevented and controlled by cleaning and repairing rain gutters, to prevent
Indoor_mold
Symptoms of illness attributed to a building
ventilation standards call for 5 to 10 cubic feet per minute of ventilation per occupant (depending on the occupancy type) in addition to ventilation
Sick_building_syndrome
Device that removes contaminants from the air in a room
modelling study from 2021 suggests that operating air purifiers or air ventilation systems in confined spaces, such as an elevator, during their occupancy
Air_purifier
Device that cools air through the evaporation of water
cooling may have little thermal comfort benefit beyond the increased ventilation and air movement it provides. Trees transpire large amounts of water
Evaporative_cooler
Communication protocol used for building automation
automation and control systems for applications such as heating, ventilating, and air-conditioning control (HVAC), lighting control, access control, and fire
BACnet
Fan used to cool an attic space
A powered attic ventilator, or attic fan, is a ventilation fan that regulates the heat level of a building's attic by exhausting hot air. A thermostat
Attic_fan
Type of heating system
constantly improved, reaching maturity with the work of de Chabannes on the ventilation of the House of Commons in the 1810s. This system remained the standard
Central_heating
Refrigeration method
Coolant Cross ventilation Dedicated outdoor air system (DOAS) Deep water source cooling Demand controlled ventilation (DCV) Displacement ventilation District
Adsorption_refrigeration
Machine to increase pressure of gas by reducing its volume
turbocharger). Compressors that are driven by an electric motor can be controlled using a VFD or power inverter, however many hermetic and semi-hermetic
Compressor
Electrical device to ionise air molecules
"Occupational Health Guideline for Ozone" (PDF). Centers for Disease Control and Prevention. Alexander, D. D.; Bailey, W. H.; Perez, V.; Mitchell, M
Air_ioniser
Device used for heating buildings
usually controlled by a thermostat inside the home, while most wood and coal-fired furnaces had no electrical connection and were controlled by the amount
Furnace_(central_heating)
Home automation software
be used and controlled via automation or script using scheduling or subroutines (including preconfigured "blueprint"), e.g. for controlling lighting, climate
Home_Assistant
Typically a portable, unvented, kerosene-fueled, space-heating device
to properly oxygenate and distribute the flames. The flame height is controlled by raising or lowering the exposed wick height inside the burner unit
Kerosene_heater
Thermometer which infers temperature by measuring infrared energy emission
induction heating; where the object is contained in a vacuum or another controlled atmosphere; or in applications where a fast response is required, the
Infrared_thermometer
Liquid additive
that these chemicals will be replenished (manually or under automatic control) to keep expensive piping and equipment from corroding. Antifreeze proteins
Antifreeze
Intermittent Mandatory Ventilation (IMV) is any mode of mechanical ventilation where a regular series of breaths is scheduled, but the ventilator senses
Intermittent mandatory ventilation
Intermittent_mandatory_ventilation
Release of a gas that was inside of some material
Coolant Cross ventilation Dedicated outdoor air system (DOAS) Deep water source cooling Demand controlled ventilation (DCV) Displacement ventilation District
Outgassing
Removal of grease from kitchen exhaust systems
National Fire Protection Association Standard 96, Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, provides cleaning
Kitchen_exhaust_cleaning
Measurement scale for the effectiveness of air filters
particulate air (HEPA) filter is impractical in residential central heating, ventilation, and air conditioning (HVAC) systems due to the large pressure drop the
Minimum efficiency reporting value
Minimum_efficiency_reporting_value
Registered trade name for halocarbon products
HFCs instead have replaced many uses, but they, too, are under strict control under the Kyoto Protocol, as they are deemed "super-greenhouse effect"
Freon
Annual international event on June 26
2024 - Temperature Matters; highlighting the significance of temperature control in daily life. "About | World Refrigeration Day". "Refrigeration now has
World_Refrigeration_Day
Heat transfer due to the movement of fluid
Coolant Cross ventilation Dedicated outdoor air system (DOAS) Deep water source cooling Demand controlled ventilation (DCV) Displacement ventilation District
Convection_(heat_transfer)
Flow-control device
A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. This enables the
Control_valve
Window protection with horizontal angled slats
louvers are very common. They are utilized for natural ventilation and temperature control. Louvers are frequently found in bell towers, where they
Louver
Branch of automation
efficiency while maintaining healthy indoor air quality (IAQ), demand control (or controlled) ventilation (DCV) adjusts the amount of outside air based on measured
Building_automation
Type of convection heater
Coolant Cross ventilation Dedicated outdoor air system (DOAS) Deep water source cooling Demand controlled ventilation (DCV) Displacement ventilation District
Oil_heater
Building automation network
control systems Energy management systems Heating/ventilation/air-conditioning systems Security systems Home automation Consumer appliance controls Public
LonWorks
Wall-mounted air conditioning system
coil The PTAC itself Room enclosure Some models have the ability, if the control board is so equipped, to add a remote thermostat. This functionality relies
Packaged terminal air conditioner
Packaged_terminal_air_conditioner
High-performance energy-efficiency building standard
mechanical ventilation with heat recovery (typically ≥75% efficiency) for IAQ and energy recovery; earth-tubes may be used with careful moisture control where
Passive_house
Concept in physics
be controlled to prevent the spread of smoke and fire, and to maintain tenable conditions for occupants and firefighters. While natural ventilation methods
Stack_effect
American HVAC professional association
is an American professional association seeking to advance heating, ventilation, air conditioning and refrigeration (HVAC&R) systems design and construction
ASHRAE
Heating of air in buildings or vehicles
by adding thermal energy. It is a fundamental component of heating, ventilation, and air conditioning (HVAC) systems, providing warmth to residential
Heating_system
Device that changes direct current (DC) to alternating current (AC)
possible to use AC-to-DC controlled rectifier circuits operating in the inversion mode. In the inversion mode, a controlled rectifier circuit operates
Power_inverter
Study of gas-vapor mixtures
mixture of water vapor and air, because of its application in heating, ventilation, and air-conditioning and meteorology. In human terms, our thermal comfort
Psychrometrics
Building design approach
cross ventilation. Stack ventilation - Cross ventilation is an effective cooling strategy, however, wind is an unreliable resource. Stack ventilation is
Passive_cooling
Air compressor
sufficiently advanced to construct a working prototype, since a scroll compressor demands very tight tolerances to function effectively. In the 1905 patent, Creux
Scroll_compressor
Damp proofing material in sheet form
designed to dry: either to the inside, the outside, or both, so the ventilation of water vapor should be taken into consideration. A vapor barrier on
Vapor_barrier
Concentration of water vapour in the air
over the equilibrium vapor pressure of pure water. Climate control refers to the control of temperature and relative humidity in buildings, vehicles
Humidity
Equipment used to transfer heat between fluids
Cooling tower Copper in heat exchangers Heat pipe Heat pump Heat recovery ventilation Jacketed vessel Log mean temperature difference (LMTD) Marine heat exchangers
Heat_exchanger
Architectural ventilation using natural and mechanical systems
Mixed-mode ventilation is a hybrid approach to space conditioning that uses a combination of natural ventilation from operable windows (either manually
Mixed-mode_ventilation
Working fluid in a refrigeration cycle
hydrofluoroolefin (HFO) R-1234yf is also called HFO-1234yf. Heating, ventilation, and air conditioning International Institute of Refrigeration Low-temperature
Refrigerant
Concept in architectural and engineering practice
practice focuses, in order of importance, on rain control, air control, heat control, and vapor control. Control of rain is most fundamental, and there are numerous
Building_envelope
Portable heater
comes from the mythical salamander, a beast that lived in fire and could control fire. Examples from kitchen use include high temperature ovens and, from
Salamander_heater
Engineering discipline of engineering systems of buildings
Australia. Mechanical engineers often design and oversee the heating, ventilation and air conditioning (HVAC), plumbing, and rainwater systems. Plumbing
Architectural_engineering
Process for digital management of built assets
and FinSESCo projects worked on the digital representation of the energy demand of the building. The nucleus is the XML from issuing Energy Performance
Building_information_modeling
Minimization of heat transfer
protection. Thermal insulation is integral to greenhouse design, enabling controlled environments for plant growth and energy efficiency. Common insulation
Thermal_insulation
Grid of slits in a barrier that allows passage of fluids but not objects
term for an enclosure in either iron or bronze." In heating, cooling, ventilation, or a combination thereof, a grille is a perforated cover for an air
Grille_(architecture)
Conduit used in heating, ventilation, and air conditioning
Ducts are conduits or passages used in heating, ventilation, and air conditioning (HVAC) to deliver and remove air. The needed airflows include, for example
Duct_(flow)
System to cool the air in a vehicle
September 2023. "VDI 6032 - Part 1 Ventilation and indoor-air quality in vehicles - Hygiene requirements for ventilation and air-conditioning systems". Beuth
Automotive_air_conditioning
Device which reduces humidity
condensed water from air. However, "passive" humidity control, such as increased natural ventilation, has been used since ancient times. These methods rely
Dehumidifier
Exhaust for a fireplace, furnace etc
3". ICC Digital Codes. Retrieved 2025-09-14. "IFGC §304 Combustion, ventilation and dilution air (2021)". ICC Digital Codes. Retrieved 2025-09-14. "IFGC
Flue
Absorption refrigerator invented in 1930
Coolant Cross ventilation Dedicated outdoor air system (DOAS) Deep water source cooling Demand controlled ventilation (DCV) Displacement ventilation District
Einstein_refrigerator
Substance used to reduce or regulate the temperature of a system
is used as a coolant replacement for cutting fluids. CO2 can provide controlled cooling at the cutting interface such that the cutting tool and the workpiece
Coolant
Aspects of fluid mechanics involving fluid flow
conservation laws may be applied to a region of the flow called a control volume. A control volume is a discrete volume in space through which fluid is assumed
Fluid_dynamics
Consumer space heater
Coolant Cross ventilation Dedicated outdoor air system (DOAS) Deep water source cooling Demand controlled ventilation (DCV) Displacement ventilation District
Ceramic_heater
Reducing radon gas levels in buildings
barometric pressure can affect short-term concentrations as well as ventilation, such as open windows and the operation of exhaust fans. Testing for
Radon_mitigation
Device which removes solid particulates from the air
in applications where air quality is important, notably in building ventilation systems engine, compressor, gas turbine compressor intakes equipment(autos
Air_filter
Air conditioning system that allows for individual control of spaces
more than 7. While it is unlikely that this balance of cooling and heating demand will happen often throughout the year, energy efficiency can be greatly
Variable_refrigerant_flow
Type of energy recovery heat exchanger
determine the suitability of rotary thermal wheels in natural ventilation, ventilation supply rates can be met but the thermal capabilities of the rotary
Thermal_wheel
Heat exchanger for space heating
make aluminium radiators very responsive to changes in the temperature demand. A fan-assisted convector contains a heat exchanger fed by hot water from
Radiator_(heating)
Topics referred to by the same term
Caritas Internationalis Demand controlled ventilation, a feedback control method to maintain indoor air quality Directional control valve, a part of hydraulic
DCV
Special purpose heat exchanger
the ventilation distribution system. Assuming the fans are fitted with inverter speed controls, set to maintain a constant pressure in the ventilation system
Recuperator
Organic chemicals having a high vapor pressure at room temperature
and hospitality is by ensuring there is proper air ventilation. Employers can ensure proper ventilation by placing furniture in a way that enhances air circulation
Volatile_organic_compound
Refrigeration process
Einstein refrigerator Air conditioning Flash evaporation Heat pump Heating, ventilation, and air conditioning (HVAC) Magnetic refrigeration Refrigerant Refrigeration
Vapor-compression refrigeration
Vapor-compression_refrigeration
Machine transforming a liquid into a gas
many industries because of their ability to separate phases through a controlled phase change process. Some air conditioners and refrigerators use compressed
Evaporator
Mathematical models of heat pumps and refrigeration
heat demand vary considerably through the seasons, typically use a variable speed inverter compressor and an adjustable expansion valve to control the
Heat pump and refrigeration cycle
Heat_pump_and_refrigeration_cycle
Temperature maintenance device connected to Wi-Fi
be used with home automation and are responsible for controlling a home's heating, ventilation, and air conditioning. They perform similar functions
Smart_thermostat
(operated simultaneously on-line or in standby), control and keying equipment, plus lighting, ventilation, and air- conditioning equipment required to maintain
Demand_load
Leakage of outside air into a building
buildings, 'forced' or 'mechanical' ventilation is not used to introduce ventilation air. Instead, natural ventilation, via openable windows and other openings
Infiltration_(HVAC)
DEMAND CONTROLLED-VENTILATION
DEMAND CONTROLLED-VENTILATION
Male
French
French form of Anglo-Saxon Eadmund, EDMOND means "protector of prosperity."
Girl/Female
British, English
Controller
Male
English
Middle English form of Anglo-Saxon Eadmund, EDMUND means "protector of prosperity."
Surname or Lastname
Possibly an altered spelling of German Dehmann (see Demann).English (Surrey)
Possibly an altered spelling of German Dehmann (see Demann).English (Surrey) : unexplained.
Female
Serbian
(Дејана) Feminine form of Serbian Dejan, DEJANA means "to take action."
Male
English
Anglicized form of Irish Gaelic Deas-Mhumhan, DESMOND means "man from south Munster."Â
Surname or Lastname
French
French : variant of Demain.English : variant of Daymon.German : variant of Damian.German : metonymic occupational name for a diamond cutter or dealer, from Middle Low German dēmant ‘diamond’.Altered spelling of German Dehmann.
Boy/Male
Indian, Sanskrit
Highly Controlled
Female
Hebrew
(×“Ö¼Ö°×’Ö¸× Ö¸×”) Variant spelling of Hebrew Deganya, DEGANA means "grain."
Male
English
 Alternate spelling of the English surname Deeming, DEMING means "act of judging." Compare with another form of Deming.
Male
French
Old French form of German Harmand, ARMAND means "bold/hardy man."
Female
English
English compound name composed of Dee (having various DEEANN meanss), and Ann, "favor; grace."
Surname or Lastname
English
English : variant of Edman.
Boy/Male
Indian, Sanskrit
Subduing; Taming; Over Powering; Self Controlled
Boy/Male
Greek, Indian, Sanskrit
Self Controlled
Boy/Male
Christian & English(British/American/Australian)
Guardian of the Riches
Surname or Lastname
English and Scottish
English and Scottish : variant spelling of Edmond.
Boy/Male
Muslim
Demand
Boy/Male
Irish
Meaning “â€one from Desmond,â€â€ Desmond being an area of South Munster, one of the four provinces of Ireland. Popular diminutives are Des and Dessie.
Boy/Male
German American French Polish
Army man; soldier. Famous Bearer: romantic actor Armand Assante.
DEMAND CONTROLLED-VENTILATION
DEMAND CONTROLLED-VENTILATION
Surname or Lastname
English
English : occupational name for a chantry priest (or the servant of one), a priest endowed to sing mass daily on behalf of the souls of the dead (Late Latin capellanus). Compare Chaplin.Americanized spelling of Swiss German Kaeppelin, a diminutive of Kappel.
Boy/Male
Indian, Sanskrit
Intelligent; Administrator
Girl/Female
Tamil
Ruby, Pearl
Boy/Male
Hebrew
Happy. In the old Testament, Asher was one of Jacob's sons.
Girl/Female
British, English
State of Rajsthan
Girl/Female
Tamil
Lakashokavinashini | லகாஅஷோகவிநாஷிநீ
Remover of universal agonies
Girl/Female
Muslim
Good wish, Spring season (Vasanth Ritu)
Girl/Female
Tamil
Khushali | கà¯à®·à®¾à®²à¯€Â
Spreading happiness
Female
Hebrew
(צוּפִית) Feminine form of Hebrew Tzuf, TZUFIT means "flow, overflow," hence "honey as dropping."
Girl/Female
Hindu, Indian, Marathi, Telugu
Goddess Laxmi's Second Name; Well Wisher
DEMAND CONTROLLED-VENTILATION
DEMAND CONTROLLED-VENTILATION
DEMAND CONTROLLED-VENTILATION
DEMAND CONTROLLED-VENTILATION
DEMAND CONTROLLED-VENTILATION
v. t.
To demand back; to demand again.
n.
One who demands.
imp. & p. p.
of Demean
p. pr. & vb. n.
of Demand
v. t.
To require as necessary or useful; to be in urgent need of; hence, to call for; as, the case demands care.
v. t.
To ask or call for with authority; to claim or seek from, as by authority or right; to claim, as something due; to call for urgently or peremptorily; as, to demand a debt; to demand obedience.
n.
Capability of being controlled; controllableness.
v. t.
That which one demands or has a right to demand; thing claimed as due; claim; as, demands on an estate.
imp. & p. p.
of Control
v. t.
A diligent seeking or search; manifested want; desire to possess; request; as, a demand for certain goods; a person's company is in great demand.
a.
Not governed or controlled.
v. t.
The right or title in virtue of which anything may be claimed; as, to hold a demand against a person.
imp. & p. p.
of Demand
n.
Capability of being controlled.
v. t.
To repel danger or harm from; to protect; to secure against; attack; to maintain against force or argument; to uphold; to guard; as, to defend a town; to defend a cause; to defend character; to defend the absent; -- sometimes followed by from or against; as, to defend one's self from, or against, one's enemies.
n.
A demand.
v. t.
The act of demanding; an asking with authority; a peremptory urging of a claim; a claiming or challenging as due; requisition; as, the demand of a creditor; a note payable on demand.
n.
A human being possessed by a demon or evil spirit; one whose faculties are directly controlled by a demon.
n.
A demanding back; a second or renewed demand.
v. i.
To make a demand; to inquire.