Air turnover (or air change rate /h) shows the part of the total air that is being changed in a room per hour. The value is the fraction between exchanged air and the volume of the room. A typical air turnover ranges between 0.2 and 0.8. The basic air turnover rate in a room is calculated from the time when this net empty – exactly just after the last person has left the room. This method is based on the fact that we, humans, discharge a considerable amount of CO2. This can eventually be tracked by quick rise in CO2 concentrations when persons are present. In nature the CO2 level about 400 ppm, while this level in a room typically reaches 700-800 ppm or more (ppm = parts per million). This means that the 400 ppm = 0,4 per mille. When we leave a room the value drops towards the 400 ppm of nature. The speed of which the CO2 drops can be converted to the air turnover of the room. By the use of algorithms the IC-Meter shows when the room is empty as well as how the CO2 level drops. By comparing a number of these situation, in which persons leave the room, the basic air turnover of the room can be calculated. Normally, the tightness of a building will be controlled at the building using a special gas. IC-Meter makes this process somewhat smarter by replacing this gas with people’s natural CO2 discharge at the same time as these calculations happen automatically and constantly.
IC meter is designed to measure the analyses in a room or a smaller housing. For larger workplaces and homes in several floors, there is need for more IC-Meters. Air moves smoothly around in a building. The problem is the rooms where the doors are often closed. Here, the indoor climate can vary considerably in rooms close to each other. Start by buying one IC-meter, and then you can top up later if you wish to zoom in on specific rooms.
The detailed data is displayed in the IC-Meter VIEW, which is your personal view. Here you can see the indoor climate measurements and forecasts of climate for the day, the local weather forecast, statistics and ratios calculated for ventilation. This is also where you make setup allows viewing rights to others, etc. MASTER VIEW is a summary view, which only shows the monthly statistics. It is aimed specifically at users with many IC-Meters, which it supplies an overview, but one line per meter. For apartments is particularly true that landlords alone must see monthly statistics in Master VIEW while tenants must see the detailed data on their own homes.
The Anybody Home function is designed to distribute the indoor climate statistics between periods when there are persons present and when periods when the room is left empty. E.g. for a daycare institution and a classroom the all day statistics might show a decent indoor climate. However, the periods of interest is when there is people present. This is what the Anybody Home function is designed for. On basis of the changes in CO2 levels – a kind of recognizing pattern – together with data about the volume of the room the IC-Meter delivers an estimate for whether there are persons present or not. The smaller the rooms or the more constant ventilation the room has the more precise is the method. However, there cannot be given a 100 % guaranty for the accuracy of the method. Test the accuracy yourself in your room.
IC-Meter is an open IT concept that makes the integration possible between the data that IC-Meter measures, retrieves and calculates. This data can be combined with other knowledge sources and also with analysis and operation tools of other suppliers. In order to ensure complete compatibility with other meters og operation units at the clients’ – e.g. energy meters, ventilation systems, heat pumps, etc. all integration and communication between are carried out in the “cloud” between the IC-Meter server and the IT system of the supplier. This offers some evident advantages. First of all, the client does not need to be involved in the setup as this taken care of by the suppliers. Each one of them that their data is correct after which the information is exchanged between the systems as web services. Secondly, the “cloud” concept assures the compatibility in relation with existing as well as with future products and knowledge sources. This also goes for brand new products for which the interface is not yet in place. For these situations, IC-Meter clients can export their own IC-Meter data to external systems that are under development. In third quarter of 2013, IC-Meter presents a new energy module which IC-Meter data is combined records of the actual heat consumption of buildings. The last mentioned data is retrieved, amongst others, from remote read energy meters of energy plants or from IC-Meters “digital oil meter”.
There is no payment for the ongoing operation of the IC-Meter. The IC-Meter is sold with a one off sales price. This price includes the ongoing operation of server, retrieving of measured data, calculation of key values, archiving of statistics, storing of the detailed data in a month as well as it includes the standard facility for the data export. IC-Meter would only charge beyond the fix sales price in case you wish that we should save your data over longer periods of time or a special web site or similar.
All data belongs to the client and is only viewable for the client. All application are related to the user and protected by password. The owner has the possibility to present part of the data for selected persons and to publish it. It is not recommended to share the detailed data with other persons than the ones you fully trust – a burglar would have great interest in knowing if anybody’s home. You can share the data the following ways: In the IC-Meter box you will find a sticker with a QR code. The idea is that you stick this on your door or similar. The persons who passes by your door can with their smartphone picture the QR code and get view of the month statistics or the actual values. If you wish to activate this function, go to the Setting and choose “Share Public Statistics” or “Share Public All”. You can also give another person access to view all your data. This you also do from the Settings where you write username on the user you are giving these rights (but do not modify the settings or forward them to third persons). The person to receive rights as reader of your data should be subscribed as IC-Meter user whether they own an IC-Meter or not.
IC-Meter uses the best sensors in the market that repport measurements of indoor climate to a central server every 5 minutes.
The IC-Meter concept has a default classification defined by The Danish Technology University (DTU), Center for Indoor Climate and Energy. These intervals reflect what is good for people, the building and the environment. They are dependent on outdoor weather conditions, and are adjusted every month.
Define your own intervals
You can define your own intervals in the Settings menu. Here you can choose between default settings, other public criteria or defining your own intervals for green, yellow and red.
Typically you would define low and high values for temperature and humidity as yellow, and extreme values as red. If you want to share your criteria with other boxes and users, you just define them as ‘Public’.
Your new criteria will be implemented automatically on the first day of the following month. So if you would like to change the actual traffic light borders, to be effective from April 1st, you should define your criteria in March.