BS 3528:1977

Foreword
Cooperating organizations
Specification
Section one. General
1 Scope
2 Definitions
Section two. Verification of thermal balance of water-
               fed or steam-fed primary circuits:
               principles and test requirements
3 General
4 Tests
Section three. Radiators, convectors and similar
               appliances: determination of thermal
               output: test method using air cooled
               closed booth
5 General
6 Radiators and convectors
7 Test facility
8 Procedure
Section four. Radiators, convectors and similar
               appliances: calculation of thermal output
               and presentation and results
9 General
10 Calculation of thermal output
11 Test report
Section five. Materials and construction
12 Test pressures
13 Materials
Section six. Method of determining thermal outputs of
               complete or partially complete families
               of radiators, convectors and similar
               appliances
14 General
15 Tests
16 Selection of samples of heaters for test
17 Additional measurements and accuracy
18 Evaluation of tests
19 Verification of the thermal output of individual
    heaters in a family
Section seven. Marking
20 Marking
Appendices
A Radiators, convectors and similar appliances:
    determination of thermal output: test method using
    liquid-cooled closed booth
B Application of weighting factors to test results
Table
1 Permissible differences from mean values of
    parameters measured in test room and in primary
    fluid circuit
2 Test plan of the short, long and intermediate
    lengths of heaters to be tested in a complete or
    partially complete family
Figures
1 Test arrangement for hot water: weighing method
2 Test arrangement for hot or superheated water:
    electrical method
3 Test arrangement for steam: weighing method
4 Test arrangement for steam: electrical method
5 Typical temperature sensor to measure the
    temperature of the water at the inlet and outlet
    during testing of convection type heat exchangers

Equipment and procedure for determining thermal output of heating appliances, including radiators, operating with steam or water. Brief references to materials and construction.