Reference and tools...

Free UK degree-day figures

Data for July 2008

Also previous reports: June 2008; May 2008; April 2008; March 2008; February 2008; January 2008; December 2007; November 2007; October 2007; September 2007; August 2007; July 2007

The free figures are monthly, for heating only, to a base temperature of 15.5°C, and only for 18 UK centres. For more places (including outside UK), alternative base temperatures, cooling figures, or weekly data see how to subscribe to Degree Days Direct.

Download Energy management leaflet 7 (PDF format) for basic information about degree-day data and how to use them, or view frequently-asked questions.

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Going equipped

If you are doing your own energy surveys (or doing them for clients) have a look at the list of recommended equipment

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U-values

12 June 2006: added on-line U-value calculator. Define your structure by entering the material and thickness for each layer, inside to out. Includes condensation risk assessment.

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Reference data

Physical constants, calorific values, units of measurement and other authoritative reference data are available free in the on-line version of Kaye & Laby 16th edition. (V.V. 27 Oct 05)

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Conversion factors

Energy content of fuels typical conversions from metered units (eg litres of oil) to kWh. View short table. See also UK government spreadsheet with more extensive range of fuels, including estimated historical averages by industry for those fuels with variable properties.

Transport CO2 emission factors: UK government guidance

General-purpose

I noticed this rather neat units-conversion program on a someone's PC; download free from joshmadison.com (V.V. 14/10/05)

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