Refurbishing VAV boxes reduces energy usage

Trox VAV Boxes

Significant energy savings can be made by refurbishing VAV boxes that have mechanical dampers with a replacement valve/damper from Trox.

Mechanical dampers typically require a pressure of 200 Pa to operate them, compared with a typical 20 Pa for the Trox valve/damper.

Such a 180 Pa reduction in downstream pressure in a building of, say, 40 000 m2 with an airflow of 15 l/s/m2 would use 308 000 kWh less electricity a year, equivalent to over 132 t of carbon dioxide.

Replacing old mechanisms also improves the accuracy of airflow control, with a further benefit to energy consumption.

BSRIA statistics and Trox’s own records indicate that there are over a million VAV boxes installed and operating in the UK, most of them consuming far more energy than necessary. Trox offers a complete upgrading service for old VAV nits, from site survey to on-site refurbishment.

For more information on this story, click here: Apr 09, 167
Related links:
Related articles:



modbs tv logo

CIBSE calls for comment on Guide M

The Chartered Institution of Building Services Engineers (CIBSE) is asking for comment on one of its most widely used guidance documents - Guide M: Maintenance Engineering and Management - ahead of a complete update.

ECA urges careful planning amid ongoing materials shortage

The ECA is urging its members, as well as the wider industry, to continue to exercise caution and plan as far ahead as possible on projects involving cable management systems (CMS).