Insulation in the 70s compared to today, modern insulation, heating costs

Less heat is needed due to the insulation. This means that the existing heating system may be oversized and runs inefficiently. The savings effect from the insulation is thus at least partially negated.

Completely correct! Are you a professional - a colleague?

Best regards

Makes sense to me, thanks for the info!

Absolutely correct! Are you a professional - a colleague?

Best regards.

Nope. Absolute layman, but I have read many of your posts
Reading educates.

Nope. Complete novice..

You are ahead of many so-called professionals in many ways! Respect!

best regards

We have such an underpowered oil heating system. (approx. 80-100kw) Designed in the early 90s for 2 large buildings with an estimated 1,000m² of residential and commercial space. The heating system was only allowed to heat 2 apartments (a total of 200m²) for 3 people in between and to provide hot water preparation for 1 person. Therefore, the problem of inefficiency is practically well known to me. Burning banknotes would probably have been more effective. Now it is allowed to operate at least 60-70% capacity again and the hot water is outsourced.

.... Therefore, I am practically familiar with the problem of inefficiency. Burning banknotes would probably have been more effective

Here you have hit a significant sore spot. Oversizing the heat generator is one of the biggest loss potentials. Anyone who thinks it is a relic of the past is gravely mistaken. Even today, heat generators are significantly oversized, mostly due to the uncertainty of the HB, who does not trust his own balance sheet, if he even has one. Free according to the motto: more helps more! Here, however, it turns into: significantly too much harms considerably! Even today, regional, location-specific climate data are not taken into account. For the heat generator, a flat rate, usually completely unjustified, is added on top of the standard heating load! How strange, now the heat generator is also becoming more expensive A knave who thinks evil in this matter.

v.g.