Paragraph 4 Items which may be included in insulation works
In addition to the items referred to in paragraph 3, and subject to the provisions of paragraph 5, the insulation works may include only the following items—
where no inlet fan ventilator system or combined ventilator system is to be provided under paragraph 3, either—
the provision and installation in each room in which there are to be insulation works of one inlet fan ventilator unit of a type conforming to the standards of ventilation and acoustic performance specified in paragraph 8, including the connection of the ventilator unit by wiring of not less than 5 amperes capacity to the nearest convenient point in the existing electric supply circuit or to the electric mains switchboard; and
the provision of an air supply duct with external cowl or grille in accordance with the specifications in paragraph 8, in an external wall of each room in which there are to be insulation works for supplying fresh air to the ventilator unit and the blocking up of any existing air brick, provided that flues and direct inlet ducts to combustion appliances in use shall not be blocked; or
the provision and installation of a combined ventilator system in accordance with the specifications referred to in paragraph 10;
the blocking at fireplace level, by means of a board of a minimum weight of 10 kilogrammes per square metre adequately sealed around the edges, of chimneys into rooms which have been insulated in accordance with paragraph 3: provided that flues to existing combustion appliances shall not be blocked;
the provision of Venetian blinds between the double windows in a room in which there are to be insulation works which has an aspect falling anywhere within a 270 degrees arc between the bearings of 45 degrees and 315 degrees from true north, subject to the blinds complying with the specifications set out in paragraph 7;
the making good of the existing fabric and decoration (not including curtains) after the installation of double windows, ventilation equipment and second doors, including the adaptation of any existing pelmet and curtain track.