As early as 2005 - while still in the planning stage - a central problem got prime time in our minds: how to operate a building of 2000 m² built in the 1930s in the long run effectively and efficiently. Normally a building that size would cause a heating bill of approx. 20.000,- € per year. And usually everybody would recommend to insulate the exterior - but the historical look would be lost. SAKKARA GmbH decided on another conept - it planned the cogeneration of heat and power - so-called block heating stations.
A block heating station (CHP) is a motor, which drives the power generator - thus creating electricity that can be used immediately, on the other side there is sufficient waste heat created by the motor, that this heat can be used as heating for the entire building.
Modern units are small and compact, they are purring softly when in operation - so they don't disturb our everyday life.
Should no power be needed for the moment, the excess power is being fed to the regional power line - should no heat be needed for the time being, this is being stored in so-called heat buffers. Thus SAKKARA GmbH was able to safe from day one more than 30% of primary energy used and to reduce the electricity bill to a few Euro only - and that in spite of 6 server units, 20 desktop work stations plus printers, lighting and coffee machines have to be on stand-by at least for 24/7. This not only conserves the purse, but also the environment. Thus SAKKARA GmbH is able to save more than 77 tons of CO2 emissions per year!
In order to meet its own philosophy about sustainability - and also to save even more CO² emissions, SAKKARA GmbH has concentrated during the past months on renovating the roof of the company's building. 220 mm der eigenen Philosophie der Nachhaltigkeit gerecht zu werden - und noch mehr CO² einzusparen, hat die SAKKARA GmbH in den zurückliegenden Monaten die Dachsanierung des Gebäudes vorangetrieben. 220 mm mineral rock wool insulation and special thermal glazing windows resulted in a low-energy standard. The old roof practically showed no insulation at all - and thus the roofage of 1000 m² just let the warmth out without any obstruction.
The calculation for this expensive rehabilitation will show profitable results in future, as Andreas Strauß, CEO of SAKKARA GmbH calculates with added savings on energy costs of almost 30%. So the environment would be saved another 20 ton load of CO², without the dancers in the bellydance boutique or the staff will have to freeze. SAKKARA was able to proof that sustainability in using ressources might be expensive first, but will be worthwile in the long run.