Building Regulations: Technical Standards

Provisions deemed to satisfy the standards

APPLICATION OF PART J

(J1.3) The requirements of J1.3b. will be met where the junctions between elements around openings in the fabric are in accordance with -

a. Appendix B to this Part; or

b. the diagram to this specification.

Diagram to (J1.3): insulation at lintel, jamb and cill

ENERGY USE STANDARDS

(J3.4) The requirements of J3.4 will be met by compliance with -

a. an energy use method approved by BRE; or

b. where the building is naturally ventilated, the CIBSE "Building Energy Code 1981", Part 2a (worksheets 1a to 1e).

LIMITING INFILTRATION

(J4.1) The requirements of J4.1 will be met where the building is constructed in accordance with the provisions of BRE Report BR 265: 1994.

Note: Although titled "Minimising air infiltration in office buildings" the general principles in this document are applicable to all buildings.

CENTRAL HEATING CONTROLS

(J5.1) The requirements of J5.1 will be met where the controls provide for zoning, timing and anti-cycling and are in accordance with -

a. paragraph 5 and sub-paragraphs 22.1, 22.2 and 22.3 of BS 5449: 1990; or

b. paragraphs 8.2(e) and 16 of BS 5864: 1989, together with paragraph 3.8 of BS6880: Part 1: 1998; or

c. the relevant parts of paragraph 3.8 of BS 6880: Part 1: 1988; or

d. The relevant recommendations of CIBSE Applications Manual AM1: 1985 "Automatic controls and their implications for systems design".

CONTROLS FOR HOT WATER STORAGE VESSELS

(J5.2) The requirements of J5.2 for heat exchangers will be met where the vessel complies with -

a. paragraph 4 and sub-paragraph 8.4 of BS 1566: Part 1: 1984 (1990); or

b. paragraph 4 and sub-paragraph 8.4 of BS 1566: Part 2: 1984 (1990); or

c. paragraph 6 of BS 3198: 1981.

INSULATION OF HOT WATER STORAGE VESSELS

(J5.3) The requirement of J5.3 will be met -

a. for a 120 litre vessel (450 mm diameter by 900 mm high), by a factory applied insulation that restricts standing heat losses to 1 W/litre or less in tests in accordance with the method in
Appendix B.4 of BS 1566: Part 1: 1984 (1990); or

b. for a vessel of any capacity, by a 35 mm, factory-applied PU-foam coating having zero ozone depletion potential and a minimum density of 30 kg/m³; or

c. for a vessel complying with BS 853: Part 1: 1996 by its having 50 mm of insulation with a thermal conductivity of 0.045 W/mK or other material of a thickness necessary to give the same performance.

INSULATION OF PIPES AND DUCTS

(J5.4) The requirements of J5.4 will be met where -

a. a pipe is insulated with material having a thermal conductivity of not greater than 0.045 W/mK and a thickness equal to the outside diameter of the pipe up to a maximum of 40 mm; or

b. a pipe or duct is insulated in accordance with the relevant recommendations of BS 5422: 1990; or

c. in the case of hot pipes connected to a hot water storage vessel complying with BS 1566: 1984 (1990) or BS 3198: 1981, the pipes, including the vent pipe, and the primary flow and return to a heat exchanger where fitted, are insulated for at least 1 m from their points of connection, or up to the point where they become concealed, with material having a thermal conductivity not exceeding 0.045 W/mK and a thickness not less than 15 mm.

ARTIFICIAL LIGHTING

(J6.1) The requirements of J6.1 will be met where the artificial lighting complies with a., b., or c. -

a. 95% of the artificial lighting capacity in circuit watts (i.e. the power consumed by lamps, their associated control gear and power factor correction equipment) is provided by lighting fittings using lamps with luminous efficacies not less than those of the types listed in the table to this specification.

Table to deemed-to-satisfy specification to J6.1a.

b. the installed lighting capacity comprises lighting fittings with lamps having an average initial (100 hour) efficacy of not less than 50 lumens per circuit-watt.

c. the lighting is in accordance with CIBSE publication "Code for Interior Lighting", 1994.

Note: For example calculations for artificial lighting see Appendix J.

SWITCHING FOR ARTIFICIAL LIGHTING

(J6.2) The requirements of J6.2 will be met by an artificial lighting system having local switches
comprising -

a. manually operated switches where the distance measured directly on plan from a switch to the furthest light fitting it controls is not more than 8 m or 3 times the height of the light fitting above the finished floor level whichever is the greater; or

b. switches operated by ultrasonic, infra-red or other remote control handsets; or

c. automatic switching which turns the lighting off when it senses the absence of occupants; or

d. in buildings of purpose groups 4 to 6, in areas where continuous lighting is required during hours of operation, time switching or daylight-linked photo-electric switching; or

e. switching in accordance with CIBSE publication "Code for Interior Lighting", 1994.