Extremely high pellet consumption (200kg in 3 days) in a Kfw70 multi-family house!

The equation cannot add up because, on the one hand, the primary energy demand was used as a consumption value, and on the other hand, the living area is applied, which is not correct. The area specifications in the energy certificate refer to the total area within the heated envelope (calculated by volume multiplied by a fixed factor). Ergo usable area. Of course, this is again wonderfully imprecise because the fixed conversion factor does not consider unusual/different ceiling heights.

Thanks for your great help! Now I have received the correct flow temperatures! Underfloor heating flow in the boiler room 48 degrees! Underfloor heating return in the boiler room 32 degrees! In the apartments, the underfloor heating flow currently arrives at about 38 degrees! All this at an outside temperature of +2 degrees!

Again my question: Are these high flow temperatures correct for a KfW70 multi-family house with a living area of about 550m² and a building area of about 950m² with a pellet heating system? Or rather too high, which would justify the currently increased pellet consumption! (Example with 500kg pellets in summer was suspected! Pellet consumption of 2 tons mid-October to mid-November correct!)

I want to address this with the heating engineer to find out whether the heating curve/adjustment is correct or if he set it initially as "mainly quickly and properly warm"...

Many thanks!

Maybe not with the exact wording... rather say that the consumption seems very high to you and your floor is very warm, and ask if he, as a professional, could perhaps take another look at the settings.