GUIDELINE

Community heating systems

Part D Materials and Workmanship

Part F Ventilation

Acceptable Construction Details

Acceptable Construction Details Introduction Thermal Bridging and Airtightness

Insulation in Cavity

• Diagram H ACD - 30 Ope split Lintels Ste... • Diagram H ACD - 12 Concrete Intermediate... • Diagram H ACD - 39 Concrete Forward cill... • Diagram H ACD - 38 Concrete backward cil... • Diagram H ACD - 19 Eaves Unventilated At... • Diagram H ACD - 40 Eaves Wall head close... • Diagram H ACD - 29 Flat roof parapet - I... • Diagram H ACD - 9 Insulation below groun... • Diagram H ACD - 33 Prestressed Concrete ... • Diagram H ACD - 22 Eaves Insulation betw... • Diagram H ACD - 15 Timber separating flo... • Diagram H ACD - 17 Masonry Partition Wal... • Diagram H ACD - 18 Stud partition wall -... • Diagram H ACD - 7 Insulation above groun... • Diagram H ACD - 21 Eaves Insulation betw... • Diagram H ACD - 14 Timber Intermediate f... • Diagram H ACD - 27 Gable Insulation betw... • Diagram H ACD - 26 Gable Insulation betw... • Diagram H ACD - 11 Timber suspended grou... • Diagram H ACD - 23 Eaves Insulation betw... • Diagram H ACD - 32 Ope Perforated Steel ... • Diagram H ACD - 20 Eaves Ventilated Atti... • Diagram H ACD - 34 Ope Jamb with closer ... • Diagram H ACD - 29 Flat roof Eaves - Ins... • Diagram H ACD - 8 Insulation above grou... • Diagram H ACD - 13 Concrete Intermediate... • Diagram H ACD - 28 Gable Insulation betw... • Diagram H ACD - 35 Ope Jamb with proprie... • Diagram H ACD - 36 Corner Inverted Corne... • Diagram H ACD - 16 Masonry solid and cav... • Diagram H ACD - 25 Eaves Insulation betw... • Diagram H ACD - 10 Insulation below grou... • Diagram H ACD - 37 Galvanised Top steel ...

Irish Water Requirements for Dwellings

Typical Inspection Reports

No 2. Inspection Foundations Radon Sump Barrier and Blinding No 26 Inspection of Windows on Rainwater System No 11. Inspection of Block work, Brickwork and feature stone band No 2. Inspection Foundations Radon Sump Barrier and Blinding No 12. Inspection of Block work, gable and party walls. No 28. Inspection of timber stairs installation No 3. Inspection Radon Barrier Blinding and Insulation No 22 Inspection Steel Beams and Intumescent paint No 4. Inspection of Radon Barrier and DPC No 25 Inspection of Windows on Front Elevations, DPM and Control Joint No 5. Inspection Radon Barrier Rising Walls Block and Brickwork No 17. Inspection of Stud wall construction No 8. Inspection of Blockwork and elements No 14 Inspection of Structural Beams No 23 Inspection of windows and doors being installed No 21 Inspection of Electrical first fix No 19. Inspection of Roof Construction and breathable membrane No 27 Inspection of Windows on Velux Rooflights No 10. Inspection of Joisting , bridging, Block work, Brickwork and Lintel supports No 16. Inspection of Stud wall construction. No 7. Inspection of Rising walls, Damp proof Course and Blockwork. No 18. Inspection of Roof Construction. No 7. Inspection of Chasing Block work, Brickwork and feature stone band No 6. Inspection Rising Walls Block and Brickwork No 8. Inspection of Radon Barrier and Damp proof Course. No 30 Inspection of timber stairs handrail installation No 15. Inspection of Stud wall and floor joist construction No 29. Inspection of timber stairs and handrail during construction stages No 3. Inspection Radon Barrier Blinding and Insulation No 31. Inspection of Timber stairs handrail. No 32. Inspection of Roof Access Hatch No 24 Inspection of Windows on Front and Rear Elevations No 20. Inspection of chasing in block party walls for electrical first fix No 13. Inspection Brickwork and Firestopping No 9. Inspection of Brick and Block work from 1st to 2nd floor

Community heating systems

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Section 6 - Community heating systems

This section provides guidance on the specification of Community Heating (CH) systems in dwellings that, if followed, will satisfy the minimum requirements of Part L of the Building Regulations.

The sections in Part L dealing with central heating and hot water systems also apply to Community Heating. Procedures for calculating the energy use and carbon emissions associated with Community Heating are included in the Dwelling Energy Assessment Procedure (DEAP).

6.1 - Scope of guidance

The guidance in this section applies to CH systems. It covers CH using boilers as the heat source as well as those that use renewable heat sources such as biofuels, heat pumps and solar panels or Combined Heat and Power (CHP),

Guidance is provided for two scenarios:

  • Where dwellings will be connected to a new CH scheme; and

  • Where dwellings will be connected to an existing CH scheme.

Guidance given in the warm air heating or underfloor heating sections is also relevant to CH where these types of space heating systems are used with CH. The remainder of this section providing guidance on CH assumes that a radiator system is employed similar to that for gas-fired central heating systems.

6.2 - Definition of Community Heating (CH)

A CH system is one that supplies heat to a number of dwellings from a common heat source. It may comprise, for example, a system heating a block of flats or a larger scale system heating many buildings. Systems that supply fewer than 15 dwellings from a central boiler system are not covered in this section of the guidance, and the guidance given for individual dwelling heating systems should be followed for these applications where appropriate.

The guidance in this document assumes that the CH distribution system uses hot water as the energy carrier. Hot water service systems may be generated centrally within each building or in individual dwellings.

Minimum provisions for connection of dwellings to a new CH scheme

In order to comply with the requirements, new CH systems to supply both new and existing dwellings should meet all of the following conditions:

  1. The minimum provisions for system design to maximise the efficiency of heat generation and minimise energy use by pumps should be met as given in Table 21.

AND

  1. Where the system uses low-carbon heat sources (e.g. CHP, biofuels, or heat pumps), the minimum provisions for the lead heat generator, should be met, as defined in Table 22.

AND

  1. Where heating systems are to be installed for new dwellings, the minimum provisions for control of the system should be met as given in Table 23

AND

  1. The minimum provisions for hot water production, storage and treatment should be met as in Table 24 (row d).

AND

  1. The minimum provisions for the installation of heat meters should be met as given in Table 24 (row e).

AND

  1. The minimum provisions for commissioning of the system should be met as given in Table 24 (row f).

AND

  1. The minimum provisions for insulation of pipework should be met as given in Table 25.

Minimum provisions for connection of dwellings to an existing CH scheme

In order to comply with the requirements of, when new or existing dwellings are connected to an existing CH scheme the following conditions should be met:

  1. Where existing CH systems are in need of replacement or improvement a specific study should be carried out to assess the economic and environmental benefits of a range of options, including the use of CHP and other renewable heat sources or chp, especially where individual heating systems are being considered as an alternative to continuing with the CH system.

AND

  1. If thermal energy is purchased from an existing district or community heating system an assessment of the carbon intensity of the scheme should be carried out. Emission factors should be determined based on the particular details of the scheme, but should take account of the annual average performance of the whole system (i.e. the distribution circuits and all the heat generating plant, including any CHP, and any waste heat recovery or heat dumping). The calculation of the Building Energy Rating should be carried out by a suitably qualified person, detailing how the emission factors were derived.

AND

  1. The minimum provisions for control systems within dwellings should be met as given in Table 23.

AND

  1. The minimum provisions for insulation of pipework should be met as given in Table 25.

Table 21

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Table 21A

Table 22

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Table 22A & 22B

Table 23

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Table 23A

Table 24

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Table 24A

Table 25

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Table 25A

Additional Supplementary Information

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Table 25B

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