Paragraph 1 I1

In this Schedule—

• “bar” means bars (absolute);

• “barg” means bars (gauge);

• “C” means degrees Celsius;

• F1...

• F2...

• F3...

• F4“gross calorific value” means the gross calorific value, expressed in MJ/ m³, of a dry gas determined on the basis that the water produced by combustion is assumed to be condensed;

• “mg/m³” means milligrams per cubic metre F5under the reference conditions;

• F6“MJ/m³” means megajoules per cubic metre under the reference conditions;

• F7...

• F8...

• F9“relative density” (“RD”) means the ratio of VG to VA (expressed in the same units) where—

  • VG is the mass of a volume of the gas when containing no water vapour under the reference conditions; and

  • VA is the mass of the same volume of air containing no water vapour under those conditions;

• F10...

• F11“WN” means the Wobbe Number of the gas, which is calculated in accordance with the following formula—

  $$gross calorific value÷\sqrt{relative density}$$

F12...