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calculations and sources/

ISSO publications and calculation methods for installation companies

Heat loss, emitters, hot water and cooling each call for their own method. Here you find the technical publications per subject, with a link to the publisher.

ISSO is the Dutch knowledge institute for building services, and its publications are written in Dutch. NEN-EN 12831-3 is the Dutch edition of a European standard. The Waterwerkbladen are Dutch technical sheets for drinking water installations.

The right method depends on the building, the installation and the purpose of the calculation. This overview describes the publications and their subject. It is not a list of features that are automatically available or applicable for every building.

See the heat loss calculation in Fikst

Heat loss

The building determines which heat loss method fits. Homes, non-residential buildings and high rooms each have their own scope.

Heat pumps and ground source energy

Output, source, emitters and use belong together. A separate output calculation is not a complete installation design.

Emitters and flow temperature

The available output depends on the emitter system, the water temperatures and the room. The manufacturer's product data is still needed.

Domestic hot water

Hot water demand, storage and heat-up output are separate parts. The difference between a single home and a collective installation counts as well.

Comfort and installation noise

A comfort assessment and a sound calculation each answer a different question. The situation, the use and the right design or measurement method determine the check.

Cooling

Room cooling load, simulation input and hydraulic cooling design are separate subjects. The publication for one subject does not replace the method for another.

Ventilation and heat recovery

The air needed per room, the choice of system and the working of the heat recovery each call for suitable input. Supply and extract are determined separately.

Further technical publications

These publications serve as reference for design, selection, balancing and insulation. A reference to these sources is not in itself a calculation of that subject.