Quick design of radiant heating/radiant cooling

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Product InstalSystem 5
Source for translation IS 5.0 Beta 31

Scope of lesson

This article presents the quick way of designing radiant heating/cooling loop circuit systems (wet and dry type). The aim of this simple approach to designing is to obtain approximate heat and flow results and to draw up a rough bill of materials.

Modules and program configuration

InstalSystem 5 with the module:

  • Radiant systems.

Inital state

The building structure (storeys, rooms) is defined, plans of storeys are provided. The values of heat load in rooms are specified for heating and cooling.

Steps to perform

The selected steps to perform are included in the basic course of radiant heating and cooling design with loop circuit systems (wet and dry type) and constitute a simplified form of operations described in:

The steps that are included in the articles mentioned above and are not included in this article are optional in the quick design.

Project files

How to calculate downloaded file?

Initial state
Final state
Designed with InstalSystem 5 Rev. Beta 31
Required modules InstalSystem basis
Heating system 5
Radiant loop systems 5
Project range Radiant heating and cooling
Used catalogues

Basic radiant systems
Brass and steel pipe couplings and fittings
Copper pipes and fittings EN 1057
Standard mixers, pump and bypass units
Standard insulation catalogue
Neutral valves catalogue - typical construction

Type of building single-family
Building structure Base drawing ground floor, dwg
Base drawing first floor, dwg
Drawings range Plan view
Prepared by Logo-instalsoft-new.png
Legal disclaimer Copying of entire project and of its fragments allowed
Calculation results List of radiant heating components, pdf
Drawing results

Specify catalogues

  1. Catalogues and select catalogues of:
    • Radiant systems
    • Pipes and pipe fittings

Specify general data

  1. Project scope and select range:
    • Heating systems
    • Cooling systems
  2. Building and surroundings
    • Climatic data - select Town
  3. Thermal systems - append information for:
    • Distribution system
      • Virtual connections of radiant systems - check that Create virtual connections when there are no graphical connections is enabled
      • Types and default data
    • Radiant systems
      • Floor systems
      • Wall systems
      • Manifolds, fittings and control
      • set Coils and Method of R.H. material listing to Each R.H. material listed separately

Edit installation - radiant system

Heating/Cooling Zone

  1. Insert Heating/Cooling Zones into rooms using the Floor (in each room) function. Repeat the operation for each storey. Insert Wall (manual) in selected rooms.


  1. Place manifolds in approximately defined locations.

Calculations and diagnostics

Verification of results

  1. Verify calculation results, diagnostics and bills of materials paying special attention to:
    • List of radiant heating components for all the key components of the system.