According the Rules of gas metering (approved by the Order of the Ministry of Energy of Russia of December 30, 2013 № 961):
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«The metering unit is a set of measuring instruments and devices that provides accounting of the amount of gas, as well as monitoring and recording its parameters.»
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«Accounting devices are measuring instruments and other technical means that perform one or more functions: measuring, accumulating, storing, displaying information about the flow (volume), temperature, gas pressure and operating time of devices.»
Set of Rules 62.13330.2011 Gas distribution systems. The updated version of SNiP 42-01-2002 (with Amendment No. 1), in cl. 7.10. stipulates that «... Each facility on which gas-using equipment is installed shall be equipped with a single gas metering unit in accordance with the regulatory legal documents of the Russian Federation.» However, this rule refers to industrial, and not to household gas-using equipment.
According the Rules of gas metering each metering unit with the appropriate measuring instrument has to determine following indications:
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Operating time of the metering unit
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Gas quantity and consumption in working and normal conditions
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Daily and hourly average gas temperature
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Daily and hourly average gas pressure
Thus, the term «gas metering unit» is applicable to industrial gas consumption, but not to household consumption.
According the «Rules of gas consumption in terms of ensuring safety while using and maintaining of gas equipment inside houses and apartments» (approved by the Resolution of the Government of the Russian Federation of May 14, 2013 No. 410) «in-apartment gas equipment» — is gas pipeline of a condominium, laid from a shut-off valve (disconnecting device) to the internal gas equipment, to household gas-using equipment located inside the premises, household gas-using equipment and technical devices on gas pipelines, including regulating and safety fittings, gas contamination control systems, individual or common (flat) gas metering device.
According the «Rules of gas supply for domestic and household needs of people (citizens)» (approved by the Resolution of the Government of the Russian Federation of July 21-2008 № 549) determination of volume of the consumed gas shall be done via the indications of counting device obeying the following rules:
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Only the types of gas meters included in the State Register of measuring devices shall be used
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The seal (seals) installed on the gas meter at the manufacturer or the organization that carried out the last verification, and the seal installed by the gas supplier at the site where the gas meter is connected to the gas pipeline, are not violated;
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The date of the next verification, determined taking into account the frequency of its conduct, established by the Federal Agency for Technical Regulation and Metrology for each type of gas meters allowed for use in the territory of the Russian Federation, did not come;
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The gas meter is found in normal workable condition
Thus, the installation of two gas meters in the household does not contradict the current regulatory and legal framework of the Russian Federation.
