Measuring air pressure - Revision history

Designing Buildings at 05:43, 3 October 2023

2023-10-03T05:43:08Z

← Older revision		Revision as of 05:43, 3 October 2023
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−	[[File:~~SkyWithClouds banner~~.jpg]]	+	[[File:SkyWithClouds_banner.jpg\|link=File:SkyWithClouds_banner.jpg]]

	= Introducing air pressures =		= Introducing air pressures =

−	Air pressure refers to the force of the weight of air molecules~~, atmospheric~~ pressure is the force of these molecules on surfaces that results from the gravitational pull of the earth. Changes in atmospheric pressure or pressure differentials cause air flows and as such can ~~be an indicator of~~ weather patterns.	+	Air pressure refers to the force of the weight of air molecules. Atmospheric pressure is the force of these molecules on surfaces that results from the gravitational pull of the earth. Changes in atmospheric pressure or pressure differentials cause air flows and as such can influence weather patterns.

−	~~In the same way within~~ buildings airflow is caused by pressure differentials between different areas, inside and outside and channels of flow. Air flows originate from areas of high ~~energy, or~~ pressure, and move to an area of lower ~~energy or~~ pressure. Heating molecules increases the spacing between them, thus reducing density causing it to rise~~. The decreasing air density lowers the pressure exerted by the air, so warm air is lighter than cold air and consequently exerts less pressure~~.	+	Within buildings airflow is also caused by pressure differentials between different areas, inside and outside and channels of flow. Air flows originate from areas of high pressure, and move to an area of lower pressure. Heating molecules increases the spacing between them, thus reducing density and causing it to rise.

−	Buildings can be subject to atmospheric pressure, localised wind pressure, pressure differences from height, temperature, mechanical intervention, infiltration, exfiltration, ventilation and so on. There are a number of ~~different~~ devices used to measure pressures ~~relating to air~~ in ~~connection with~~ buildings, some of ~~these~~ are listed ~~here, though the list is not exhaustive~~.	+	Buildings can be subject to atmospheric pressure, localised wind pressure, pressure differences from height, temperature, mechanical intervention, infiltration, exfiltration, ventilation and so on.
		+
		+	There are a number of devices used to measure air pressures in buildings, some of which are listed below.

	[[File:BSRIA_Balometers_3banner.jpg\|link=https://www.bsria.com/uk/instrument/instruments/airflow/balometers/]]		[[File:BSRIA_Balometers_3banner.jpg\|link=https://www.bsria.com/uk/instrument/instruments/airflow/balometers/]]
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	= Manometer =		= Manometer =

−	A manometer is a ~~scientific~~ device ~~that is~~ used to pressure differences, this could be pressure relative to atmospheric pressure (a barometer), within a vessel or chamber, a gas or liquid to calculate flow rates through a device such as a duct or blood pressure in a person.	+	A manometer is a device used to measure pressure differences, this could be pressure relative to atmospheric pressure (a barometer), within a vessel or chamber, a gas or liquid, to calculate flow rates through a device such as a duct or blood pressure in a person.

−	They are commonly used in the construction industry ~~for~~ building services to measure system air pressure in heating, ventilation, and air conditioning systems, airflows, positive and negative pressures in ducts, or pressure differentials across filters and coils. There are effectively four types of manometers, the first two relying on a fluid, in a closed or open tube~~, and~~ the third, aneroid manometer, without a fluid and finally a digital aneroid manometer~~, they all measure pressure through comparison or differentials~~.	+	They are commonly used in the construction industry in building services to measure system air pressure in heating, ventilation, and air conditioning systems, airflows, positive and negative pressures in ducts, or pressure differentials across filters and coils.
		+
		+	There are effectively four types of manometers, the first two relying on a fluid, in a closed or open tube; the third, aneroid manometer, without a fluid; and finally a digital aneroid manometer.

	= Barometer =		= Barometer =

−	A barometer is a type of manometer that ~~specifically~~ measures a pressure relative to a prevailing atmospheric pressure~~(manometers more specifically measure pressure differences)~~. Air in the atmosphere has a weight which presses against all surfaces on the earth as gravity pulls it ~~inward~~, barometers measure this pressure. ~~Different barometer designs exist (similarly with manometer designs), essentially there~~ are ~~those~~ containing a fluid (mostly mercury) in a closed or open tube design, those without a fluid, using mechanical parts ~~called an~~ aneroid ~~barometer~~ and contemporary or digital barometers.	+	A barometer is a type of manometer that measures pressure relative to a prevailing atmospheric pressure. Air in the atmosphere has a weight which presses against all surfaces on the earth as gravity pulls it down, barometers measure this pressure. There are barometers containing a fluid (mostly mercury) in a closed or open tube design, those without a fluid, using mechanical parts (aneroid barometers) and contemporary or digital barometers.

−	Barometers measure atmospheric pressure, the units were originally referred to as atmospheres, ~~relating to~~ a unit of air pressure at sea level at a temperature of 15 degrees C~~, later~~ this was defined as 1.01325 x 105 pascals. Today this is often referred to as bar ~~which is simply a pressure unit, and defined as~~ 100 kilo-pascals. So one atmosphere (atm) is almost the same as one bar, but not quite~~, more specifically 1 atm is equal to 1.01325 bar~~. These devices often found outside windows in homes, used to measure the outside air pressure to assist in weather predictions, as rising air pressure ~~indicates~~ a good weather forecast whilst falling pressure might ~~forecast~~ rain or bad weather.	+	Barometers measure atmospheric pressure, the units were originally referred to as 'atmospheres', describing a unit of air pressure at sea level at a temperature of 15 degrees C. Later this was defined as 1.01325 x 105 pascals. Today this is often referred to as 'bar' (100 kilo-pascals). So one atmosphere (atm) is almost the same as one bar, but not quite. These devices are often found outside windows in homes, used to measure the outside air pressure to assist in weather predictions, as rising air pressure tends to indicate a good weather forecast whilst falling pressure might suggest rain or bad weather.

	= Anemometer =		= Anemometer =

−	An anemometer is an instrument that is used to measure wind speed~~, they can also be used to measure~~ wind pressure, wind flow and wind direction. They are a common ~~component~~ part of weather stations and sometimes seen on rooftops ~~or high buildings~~. The simplest type of anemometer has a spinning wheel, which spins faster as the wind blows ~~stronger the~~ number and speed of rotations, is used to calculate wind speed. There are ~~however~~ many different types of anemometer ~~which include the afore mentioned~~ cup anemometers, vane anemometers, hot-wire anemometers, ping-pong ball anemometers as well as laser doppler, ultrasonic and acoustic resonance anemometers.	+	An anemometer is an instrument that is used to measure wind speed or wind pressure, wind flow and wind direction. They are a common part of weather stations and are sometimes seen on rooftops. The simplest type of anemometer has a spinning wheel, which spins faster as the wind blows more strongly. The number and speed of rotations is used to calculate wind speed.
		+
		+	There are many different types of anemometer, including cup anemometers, vane anemometers, hot-wire anemometers, ping-pong ball anemometers as well as laser doppler, ultrasonic and acoustic resonance anemometers.

	= Balometer =		= Balometer =

−	A ~~Balometer,~~ is a type of airflow meter that resembles an air collection hood~~, also~~ referred to as an air flow hood. It is used to measure the flow rate of air leaving or entering the ventilation outlet of an airflow system. Some, balometers also measure the atmospheric pressure of a space as well as the temperature and relative humidity of the flowing air.	+	A balometer is a type of airflow meter that resembles an air collection hood and is sometimes referred to as an air flow hood. It is used to measure the flow rate of air leaving or entering the ventilation outlet of an airflow system. Some, balometers also measure the atmospheric pressure of a space as well as the temperature and relative humidity of the flowing air.

−	Balometers contain a grid with many holes called a flow grid and a micro-manometer~~, this~~ measures the flow and pressure ~~individually and~~ throughout the grid and compares ~~this~~ to the atmospheric pressure in the space~~. The function in a similar way to air capture hoods that contain an anemometer but tend to be more accurate and are pre-configured to convert a recorded velocity of air into an volumetric measure~~.	+	Balometers contain a grid with many holes called, a flow grid, and a micro-manometer. This measures the flow and pressure throughout the grid and compares it to the atmospheric pressure in the space.

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =

Editor at 05:20, 3 October 2023

2023-10-03T05:20:00Z

← Older revision		Revision as of 05:20, 3 October 2023
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−	[[File:~~BSRIA Balometers 3banner~~.jpg~~\|link=https://www.bsria.com/uk/instrument/instruments/airflow/balometers/~~]]	+	[[File:SkyWithClouds banner.jpg]]
−		+
−	~~[https://www.bsria.com/uk/instrument/instruments/airflow/balometers/ Images from BSRIA instrument sales and hire~~]	+

	= Introducing air pressures =		= Introducing air pressures =
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	Buildings can be subject to atmospheric pressure, localised wind pressure, pressure differences from height, temperature, mechanical intervention, infiltration, exfiltration, ventilation and so on. There are a number of different devices used to measure pressures relating to air in connection with buildings, some of these are listed here, though the list is not exhaustive.		Buildings can be subject to atmospheric pressure, localised wind pressure, pressure differences from height, temperature, mechanical intervention, infiltration, exfiltration, ventilation and so on. There are a number of different devices used to measure pressures relating to air in connection with buildings, some of these are listed here, though the list is not exhaustive.
		+
		+	[[File:BSRIA_Balometers_3banner.jpg\|link=https://www.bsria.com/uk/instrument/instruments/airflow/balometers/]]
		+
		+	[https://www.bsria.com/uk/instrument/instruments/airflow/balometers/ Images from BSRIA instrument sales and hire]

	= Manometer =		= Manometer =

Editor at 05:15, 3 October 2023

2023-10-03T05:15:54Z

← Older revision		Revision as of 05:15, 3 October 2023
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		+	[[File:BSRIA Balometers 3banner.jpg\|link=https://www.bsria.com/uk/instrument/instruments/airflow/balometers/]]
		+
		+	[https://www.bsria.com/uk/instrument/instruments/airflow/balometers/ Images from BSRIA instrument sales and hire]
		+
	= Introducing air pressures =		= Introducing air pressures =

Editor at 05:12, 3 October 2023

2023-10-03T05:12:40Z

← Older revision		Revision as of 05:12, 3 October 2023
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	= Anemometer =		= Anemometer =

−	An anemometer is an instrument that is used to measure wind speed, they can also be used to measure wind pressure, ~~windf low~~ and wind direction. They are a common component part of weather stations and sometimes seen on rooftops or high buildings. The simplest type of anemometer has a spinning wheel, which spins faster as the wind blows stronger the number and speed of rotations, is used to calculate wind speed. There are however many different types of anemometer which include the afore mentioned cup anemometers, vane anemometers, hot-wire anemometers, ping-pong ball anemometers as well as laser doppler, ultrasonic and acoustic resonance anemometers.	+	An anemometer is an instrument that is used to measure wind speed, they can also be used to measure wind pressure, wind flow and wind direction. They are a common component part of weather stations and sometimes seen on rooftops or high buildings. The simplest type of anemometer has a spinning wheel, which spins faster as the wind blows stronger the number and speed of rotations, is used to calculate wind speed. There are however many different types of anemometer which include the afore mentioned cup anemometers, vane anemometers, hot-wire anemometers, ping-pong ball anemometers as well as laser doppler, ultrasonic and acoustic resonance anemometers.

	= Balometer =		= Balometer =

−	A Balometer, is a type of airflow meter that resembles an air collection hood, also referred to as an air flow hood. It is used to measure the flow rate of air leaving or entering the ventilation outlet of an airflow system. Some, balometers also ~~measurethe~~ atmospheric pressure of a space as well as the temperature and relative humidity of the flowing air.	+	A Balometer, is a type of airflow meter that resembles an air collection hood, also referred to as an air flow hood. It is used to measure the flow rate of air leaving or entering the ventilation outlet of an airflow system. Some, balometers also measure the atmospheric pressure of a space as well as the temperature and relative humidity of the flowing air.

−	Balometers contain a grid with many holes called a flow grid and a micro-manometer, this measures the flow and ~~pressureindividually~~ and throughout the grid and compares this to the atmospheric pressure in the space. The function in a similar way to air capture hoods that contain an anemometer but tend to be more accurate and are pre-configured to convert a recorded velocity of air into an volumetric measure.	+	Balometers contain a grid with many holes called a flow grid and a micro-manometer, this measures the flow and pressure individually and throughout the grid and compares this to the atmospheric pressure in the space. The function in a similar way to air capture hoods that contain an anemometer but tend to be more accurate and are pre-configured to convert a recorded velocity of air into an volumetric measure.

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =

Designing Buildings: moved Measuring air presssure to Measuring air pressure

2023-10-01T05:08:21Z

moved Measuring air presssure to Measuring air pressure

← Older revision

Revision as of 05:08, 1 October 2023

Editor at 10:47, 29 September 2023

2023-09-29T10:47:41Z

← Older revision		Revision as of 10:47, 29 September 2023
Line 1:		Line 1:
−	~~Air pressure refers to the force of the~~ air molecules, atmospheric pressure is the force of these molecules on surfaces that results from the gravitational pull of the earth. Changes in atmospheric pressure or pressure differentials cause air flows and as such can be an indicator of weather patterns. In the same way within buildings airflow is caused by pressure differentials between different areas, this flow will originate from an area of high energy, or pressure, and move to an area of lower energy or pressure.	+	= Introducing air pressures =

−	~~Buildings can be subject~~ to atmospheric pressure~~, localised winds,~~ pressure ~~differences from height, infiltration, exfiltration, ventilation etc aswell~~ as ~~mechanical fans, pumps, temperature differences and so on~~	+	Air pressure refers to the force of the weight of air molecules, atmospheric pressure is the force of these molecules on surfaces that results from the gravitational pull of the earth. Changes in atmospheric pressure or pressure differentials cause air flows and as such can be an indicator of weather patterns.

−	[[Category:~~Articles_needing_more_work~~]]	+	In the same way within buildings airflow is caused by pressure differentials between different areas, inside and outside and channels of flow. Air flows originate from areas of high energy, or pressure, and move to an area of lower energy or pressure. Heating molecules increases the spacing between them, thus reducing density causing it to rise. The decreasing air density lowers the pressure exerted by the air, so warm air is lighter than cold air and consequently exerts less pressure.
		+
		+	Buildings can be subject to atmospheric pressure, localised wind pressure, pressure differences from height, temperature, mechanical intervention, infiltration, exfiltration, ventilation and so on. There are a number of different devices used to measure pressures relating to air in connection with buildings, some of these are listed here, though the list is not exhaustive.
		+
		+	= Manometer =
		+
		+	A manometer is a scientific device that is used to pressure differences, this could be pressure relative to atmospheric pressure (a barometer), within a vessel or chamber, a gas or liquid to calculate flow rates through a device such as a duct or blood pressure in a person.
		+
		+	They are commonly used in the construction industry for building services to measure system air pressure in heating, ventilation, and air conditioning systems, airflows, positive and negative pressures in ducts, or pressure differentials across filters and coils. There are effectively four types of manometers, the first two relying on a fluid, in a closed or open tube, and the third, aneroid manometer, without a fluid and finally a digital aneroid manometer, they all measure pressure through comparison or differentials.
		+
		+	= Barometer =
		+
		+	A barometer is a type of manometer that specifically measures a pressure relative to a prevailing atmospheric pressure(manometers more specifically measure pressure differences). Air in the atmosphere has a weight which presses against all surfaces on the earth as gravity pulls it inward, barometers measure this pressure. Different barometer designs exist (similarly with manometer designs), essentially there are those containing a fluid (mostly mercury) in a closed or open tube design, those without a fluid, using mechanical parts called an aneroid barometer and contemporary or digital barometers.
		+
		+	Barometers measure atmospheric pressure, the units were originally referred to as atmospheres, relating to a unit of air pressure at sea level at a temperature of 15 degrees C, later this was defined as 1.01325 x 105 pascals. Today this is often referred to as bar which is simply a pressure unit, and defined as 100 kilo-pascals. So one atmosphere (atm) is almost the same as one bar, but not quite, more specifically 1 atm is equal to 1.01325 bar. These devices often found outside windows in homes, used to measure the outside air pressure to assist in weather predictions, as rising air pressure indicates a good weather forecast whilst falling pressure might forecast rain or bad weather.
		+
		+	= Anemometer =
		+
		+	An anemometer is an instrument that is used to measure wind speed, they can also be used to measure wind pressure, windf low and wind direction. They are a common component part of weather stations and sometimes seen on rooftops or high buildings. The simplest type of anemometer has a spinning wheel, which spins faster as the wind blows stronger the number and speed of rotations, is used to calculate wind speed. There are however many different types of anemometer which include the afore mentioned cup anemometers, vane anemometers, hot-wire anemometers, ping-pong ball anemometers as well as laser doppler, ultrasonic and acoustic resonance anemometers.
		+
		+	= Balometer =
		+
		+	A Balometer, is a type of airflow meter that resembles an air collection hood, also referred to as an air flow hood. It is used to measure the flow rate of air leaving or entering the ventilation outlet of an airflow system. Some, balometers also measurethe atmospheric pressure of a space as well as the temperature and relative humidity of the flowing air.
		+
		+	Balometers contain a grid with many holes called a flow grid and a micro-manometer, this measures the flow and pressureindividually and throughout the grid and compares this to the atmospheric pressure in the space. The function in a similar way to air capture hoods that contain an anemometer but tend to be more accurate and are pre-configured to convert a recorded velocity of air into an volumetric measure.
		+
		+	= Related articles on Designing Buildings =
		+
		+	* Adaptive comfort.
		+	* Adverse weather.
		+	* Air change rates
		+	* Air conditioning.
		+	* Air infiltration.
		+	* Air permeability testing.
		+	* Air quality.
		+	* Air tightness in buildings.
		+	* Balometer.
		+	* Barometer.
		+	* Climate.
		+	* Cold stress.
		+	* Computational fluid dynamics.
		+	* Cross ventilation.
		+	* Cultivating Cleaner Air with BSRIA.
		+	* Displacement ventilation.
		+	* Domestic ventilation systems performance
		+	* Draughts in buildings.
		+	* Effective ventilation in buildings.
		+	* Extreme weather.
		+	* Extreme weather event.
		+	* Heat recovery ventilation.
		+	* Indoor air quality.
		+	* Mechanical ventilation.
		+	* Natural ventilation.
		+	* Passive building design.
		+	* Stale air.
		+	* Thermal comfort.
		+	* UV disinfection of building air to remove harmful bacteria and viruses.
		+	* Ventilation.
		+	* Weather.
		+	* Wind.
		+
		+	[[Category:DCN_Definition]] [[Category:DCN_Education_and_Training]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Research,_Development_and_Innovation]] [[Category:DCN_Specification]] [[Category:Definitions]] [[Category:Research_/_Innovation]] [[Category:Standards_/_measurements]] [[Category:Sustainability]]

Editor: Created page with "Air pressure refers to the force of the air molecules, atmospheric pressure is the force of these molecules on surfaces that results from the gravitational pull of the earth. Cha..."

2023-09-29T10:33:09Z

Created page with "Air pressure refers to the force of the air molecules, atmospheric pressure is the force of these molecules on surfaces that results from the gravitational pull of the earth. Cha..."

New page

Air pressure refers to the force of the air molecules, atmospheric pressure is the force of these molecules on surfaces that results from the gravitational pull of the earth. Changes in atmospheric pressure or pressure differentials cause air flows and as such can be an indicator of weather patterns. In the same way within buildings airflow is caused by pressure differentials between different areas, this flow will originate from an area of high energy, or pressure, and move to an area of lower energy or pressure.

Buildings can be subject to atmospheric pressure, localised winds, pressure differences from height, infiltration, exfiltration, ventilation etc aswell as mechanical fans, pumps, temperature differences and so on

[[Category:Articles_needing_more_work]]