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NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

The Workplace (Health, Safety and Welfare) Regulations (Northern Ireland) 1993 (the Workplace Regulations) contain some requirements which affect building design. The main requirements are now covered

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Envelope area – the total area of all wall, floor and ceiling elements that enclose the internal volume subject to an air permeability test. This includes walls and floors below external ground level.

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

The common areas of buildings containing multiple dwellings are not classified as dwellings. These common areas should – (a) where they are not heated, comply with the fabric standard provisions of pa

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Where a building contains more than one dwelling (such as in a terrace of houses or in a block of flats), an average TER may be calculated for all the dwellings in the building. In such cases, the ave

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Where a building contains more than one dwelling (such as in a terrace of houses or in a block of flats), either each individual dwelling should have a DER that is less than its TER by at least the ma

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

the DER for flats should better the TER by a minimum of 25%. DER(nzeb flat) ≤ 0.75 x TER This means that if, for example, the TER provided by SAP is 20 kgCO2e/m2/yr, then a new flat would require a D

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Cavity walls separating dwellings (hereafter referred to as party walls) may not have zero heat loss because a thermal bypass is created where there is air movement in the cavity. Fully filling the ca

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Where edge sealing is adopted to address the party wall bypass it is essential that the edge sealing is effective in restricting air flow into the cavity and that it is aligned with the thermal envelo

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

In considering heat losses via party walls it is important to be aware that wherever the wall penetrates an insulation layer, such as when the blockwork of a masonry party wall penetrates insulation a

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

It is important also to be satisfied that any solution to the party wall bypass does not contravene other parts of the regulations, in particular Part G Resistance to the passage of sound and Part E F

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Type of party wall(1) | U-value Solid | 0.00 Unfilled cavity with effective edge sealing around all exposed edges and in line with insulation layers in abutting elements | 0.20 Fully filled cavity wit

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Each block of flats should be treated as a separate development irrespective of the number of blocks of flats on the site.

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

New guidance is provided to further support regulation 43B (Nearly zero-energy requirements for new buildings) ('NZEB'), requiring NZEB buildings to better the previous Target carbon dioxide Emissions