1. BS EN 772-2:1998. Methods of test for masonry units - Part 2: Determination of percentage area of voids in masonry units (by paper indentation)

2. BS EN 772-20:2000. Methods of test for masonry units - Part 20: Determination of flatness of faces of masonry units

3. BS EN 772-21:2011. Methods of test for masonry units - Part 21: Determination of water absorption of clay and calcium silicate masonry units by cold water absorption

4. BS EN 772-3:1998. Methods of test for masonry units - Part 3: Determination of net volume and percentage of voids of clay masonry units by hydrostatic weighing

5. BS EN 772-4:1998. Methods of test for masonry units - Part 4: Determination of real and bulk density and of total and open porosity for natural stone masonry units

6. BS EN 772-5:2016. Methods of test for masonry units - Part 5: Determination of the active soluble salts content of clay masonry units

7. BS EN 772-7:1998. Methods of test for masonry units - Part 7: Determination of water absorption of clay masonry damp proof course units by boiling in water

8. BS EN 772-9:1998. Methods of test for masonry units - Part 9: Determination of volume and percentage of voids and net volume of clay and calcium silicate masonry units by sand filling

9. BS EN 778:2009. Domestic gas-fired forced convection air heaters for space heating not exceeding a net heat input of 70 kW, without a fan to assist transportation of combustion air andor combustion products

10. BS EN 779:2012. Particulate air filters for general ventilation - Determination of the filtration performance