Trade centre

Building description

NameTrade centre
Building OwnerInvestment company
Type of buildingTrade centre
Use typeShopping centre

The Building

The trade centre was built in 2004 and after 9 years of operation in 2013 the trade centre undergone minor reconstruction and reopened on 12th September. The building is used as a shopping centre with one main grocery store chain anchor tenant – RIMI, and several other smaller tenants. In total there are 9 different shops in the trade centre.

The building is located in the centre of Riga with good surrounding infrastructure. The standard heating season in Riga is 203 days long with an average temperature of 0 oC, which equates to about 4060 degree days. There are no specific determination on standard cooling days which could be used to benchmark cooling performance. Trade centre is located in Riga, near the gulf of Riga and the elevation above sea level is about 10 m.

Building is operated as shopping centre, which is its initial operation mode since the building has been built. The calculated building energy consumption for heating is 147,8 kWh/m2

Quality Management

The main aim of the project was to conduct an energy audit to ensure conformity with existing legislation. As a part of building energy audit, TMon was implemented to verify system operation according to desired specifications. Therefor the main activities within TMon in this case were:

  • Evaluation of existing equipment and technical documentation;
  • Additional measurements to acquire necessary data points;
  • Evaluation of AHU technical performance.
Building owner:Investment company
Facility Management:Facility Management company
TMonEkodoma, Ltd


Building had been built in 2004 and reconstructed in 2013, therefore some parts of technical documentation were not available or were incomplete. The first steps regarding TMon was to evaluate available data points regarding to system operation in BMS, define other necessary data points for system evaluation and conducting interviews with building owner and management company to establish the desired functional specification of the AHU system. In order to achieve this, several site visits were organized and additional long term measurements were made to acquire necessary data points for comprehensive evaluation. After establishing necessary inputs, TMon was carried out and recommendations for performance improvement were evaluated and presented. During the project, building owners have changed and no additional follow-up activities have been performed.

Building’s technical equipment

System/typePower, source/fuel type, size, circuits …Selected for QM-process
HeatingHeating boilers
  • Gas boilers
  • Domestic hot water
  • Central AHU heating 
  • Heating circuit of the building
Hot water storageCentral hot water storage and decentral electrical hot water boilers≈1m3 in totalNo
CoolingDecentralised split-type cooling units23 units in totalNo
Ventilation2 central devices4 kW motorsYes
Cold sourceCompression refrigeration machine for food refrigerationElectricityNo
LightingLED, HID, CFLElectricityNo
Electrical SupplyPower gridElectricityNo

Energy Performance (Evaluation of Savings)

Baseline (kWh/a)Savings (kWh/a)%Savings (kg/a)
Heating energy212137,43182015,08400,5
Electricity for AHU178597674,383,6

Operational Performance