This week

• Passivent’s Enhanced Digital Control system, a method of controlling natural air movement to ventilate buildings, has become recognised under the government’s Enhanced Capital Allowance scheme, managed by the Carbon Trust. This means that investment in the technology can be written off against taxable profits for the first year of investment.

• Zumtobel Lighting has launched a web-based lighting calculation tool, QuickCalc, on its website ( The programme is designed to carry out fast, rough calculations of luminaire numbers in rectangular rooms through a drag-and-drop user interface. The calculation takes into consideration room size, installation height and illumination required.

• The Chartered Institution of Building Services Engineers (CIBSE) has published a Sustainability Toolkit. This includes a searchable online database of good practice guidance and advice on the design, construction, commissioning and operation of sustainable building elements.

It costs £25 for members and £50 for non-members.

• The Institution of Engineering and Technology has published Wind Power and Integration: Connection and System Operational Aspects, a book to explain the implications of wind power systems. Network development, monitoring and connection are addressed, as are the commercial challenges.

• Calmag, one of Europe’s largest independent manufacturers of water conditioning products, has joined the Domestic Water Treatment Association.