What do you pay for a room heating load calculation (DIN12831)?

Hello, from April we now have a very good solution in HVAC for the room heating load calculation according to DIN EN 12831 together with a national guideline.
Please do not confuse this with the building heating load from the thermal insulation verification or the energy consultant, as this is not used for heating system design and also provides a completely different value here.

Please specify:
-Costs
-Living area

I am interested in the impact of the new harmonization on future planning costs.

180 EUR flat rate, 131 sqm living space, 2 full floors with gable roof, split air-water heat pump

Hi

The costs usually amount to €1.50 to €2.00/m2 including the design of the underfloor heating



Olli

Nothing, made by myself with the help of a tool and another forum

Me too. The heating engineer then discarded the planning from a specialist company (underfloor heating manufacturer) with a 35°C supply temperature and implemented my calculation. Also, such special things like routing 15 meters of the bathroom return pipe in the hallway. As a result, I only have slight differences in the heating circuit lengths, fairly short circuit lengths, and at the heating circuit distributor, all circuits except for the bedroom are fully open. This saves pump electricity every year, permanently until the wrecking ball comes. Of course, you need a heating engineer who goes along with this...

On the first attempt including underfloor heating design, 175 euros. However, I was less satisfied with the result, as some specifications were not met (according to their own statement, for example, things like 30 °C supply temperature are not feasible under real conditions...). The underfloor heating design was also rather inconsistent, with heating circuit lengths between 30 and 140m.

Our HVAC technician has now commissioned a new HLB including underfloor heating design, and the result is perfect, as the MEP planner sticks to what is repeatedly preached in the H-T-D forum (supply temperature 30 °C, equal-length heating circuits around 80m, ...)! Costs about 150 euros. The heated living area is 165sqm.