Some completed projects in Swedish buildings.

Hotell Skyline, Malmö

Taken steps: Adjustment of heating systems, change circulation pumps and control panel, overhaul ventilation system.
Energy consumption prior:
(district heating)
1958 MWh
Energy consumption after:
(district heating)
1435 MWh
Savings
(district heating)
523 MWh
Savings
(electricity)
174 MWh
Annual saving about 700 MWh.
 

Ramstycket, 1 Bandhagen Stockholm

Apartments, premises and offices. Totally 8200 m².
Taken steps: Adjust heating system, exchange circulation pump and three 1 MW oil boilers to one 500 kW oil boiler.
Energy consumption prior:
(oil)
234 m³
Energy consumption after:
(oil)
169 m³
Annual saving about 65 m oil (28%)
 

Roddaren, 38 "Sportpalatset" Stockholm

Apartments 4000 m², offices 11200 m², garage 4400 m².
Taken steps: Adjust heating system, exchange circulation pumps and control panel, partly rebuild heat exchanger, pressure balancing of ventilation system.
Energy consumption prior:
(district heating)
3500 MWh
Energy consumption after:
(district heating)
2500 MWh
Yearly saving about 1000 MWh (29%)
The building had circulation pumps of several kW installed - one main pump and a several auxiliary pumps. The result was there had not been any water in the radiators at the three highest floors since the house was built in 1932. Instead we installed two 100 W circulation pumps, one for the apartments and one for the offices, and succeeded in getting water to all floors. Pay back was one year.
 

Embla, 11 Skellefteå

Small dwelling-house with 5 apartments, 366 m² in all.
Taken steps: Installation of correct effect dimensioned heat pump that provides the entire annual energy requirement.
Energy consumption prior:
(oil)
11 m³
Energy consumption after:
(electricity)
30 MWh
Annual saving about 80 MWh.
 

Apeln, 11-12, Lund

Block of flats in three floors + basement + attic consisting of two identical buildings raised 1951, total living area of 3108 m².
Taken steps: Adjustment of heating system, exchange circulation pumps and control panel.
Energy consumption prior:
(district heating)
680 MWh
Energy consumption after:
(district heating)
540 MWh
Annual saving about 140 MWh (21%)
 
All above accomplished projects have a pay back less than 2 years.