An oversized heat generator costs more to run, wears faster and heats less comfortably. Correct sizing comes from a heat-loss calculation, not from a rule of thumb per square metre.
We calculate the property's heat loss, derive the required output, then check that generator, emitters and flow temperature work together.
A heat pump performs at low flow temperatures. If the emitters are undersized, it runs hot and never reaches the efficiency quoted in the brochure. We check this room by room before installation.
Many installers work carefully, but an independent calculation gives you a figure to compare against and avoids commercial oversizing.
Usually yes: insulation lowers demand, which lowers the required output and the cost of the equipment. The study lets you decide with numbers.
