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What is fresh Air

What is fresh Air
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What is Fresh Air and is it Really Fresh? Gas Sensing Solutions Ltd. Page | 1 For regular updates, sign up at https://gassensing.co.uk Revision 2.0, 9 October 2020 Copyright © 2021 Gas Sensing Solutions Ltd.

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WHITE PAPER INTRODUCTION Covid-19 is a highly contagious disease and to mitigate the spread of the virus especially indoors, the common refrain is to make sure the space is well ventilated with fresh air. But what exactly is fresh air? Fresh air is typically defined as cool, unpolluted air in natural surroundings. But as there is no agreed parametric definition of what fresh air is, how can you determine if the air indoors is really fresh? Although the World Health Organisation (WHO) has not formally confirmed that COVID-19 is spread by airborne transmission, it is probably only a matter of...

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WHITE PAPER HOW DO CO2 LEVELS EQUATE TO FRESH AIR? The amount of carbon dioxide in a building is usually related to how much fresh air is being brought into the building. In general, the higher the concentration of carbon dioxide in the building in comparison to outdoors, the lower the amount of fresh air exchange. The background level of CO2 outdoors is generally considered to be in the range of 350-450 parts per million (ppm). CO2 is a byproduct of normal human activity and is removed from the body via the lungs in the exhaled air. Unless an indoor space is adequately ventilated, CO2 will...

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WHITE PAPER All GSS sensors use an in-house designed ultra-efficient LED light source. LEDs are much more efficient in converting electrical power into light than conventional light sources and they do not need the long warm up times suffered by incandescent light sources. The length of time the light source is active is a major contributor to how much power is consumed by the sensor. In a power sensitive application, a GSS CO2 sensor is typically pulsed on and off to minimise overall power consumption. Depending on installation requirements, a CO2 monitor can range from a simple display on...

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WHITE PAPER THE ULTRA-LOW-POWER COZIR®-BLINK CO2 SENSOR The latest GSS sensors such as the CozIR®-Blink are designed to operate in battery powered units so they can be easily installed and deployed. They are designed to be power cycled, where the whole device is powered down after a CO2 reading has been made. A typical installation might be preprogrammed to take one reading every few minutes. Depending on the required CO2 measurement accuracy, if the sensor is configured to take a reading every minute, the power consumed by the CozIR®-Blink can be as low as 26uW per reading. Whilst...

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WHITE PAPER IMPORTANT NOTICE Gas Sensing Solutions Ltd. (GSS) products and services are sold subject to GSS’s terms and conditions of sale, delivery and payment supplied at the time of order acknowledgement. GSS warrants performance of its products to the specifications in effect at the date of shipment. GSS reserves the right to make changes to its products and specifications or to discontinue any product or service without notice. Customers should therefore obtain the latest version of relevant information from GSS to verify that the information is current. Testing and other quality...

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