It's important to figure out what type of headache is causing your pain. If you know your headache type, you can treat it correctly. In one 2004 study, 80% of people who had a recent history of self-described or doctor-diagnosed sinus headache, but no signs of sinus infection, actually met the criteria for migraine.
Different types of boilers and boiler brands. The boiler market in the UK is dominated by one particular type of boiler: the condensing boiler. However, there are different types of condensing boiler, including combi-boilers, heat-only and system boilers. Popular brands producing combi-boilers include Baxi and Glow Worm (both Baxi heating boilers and Glow Worm boilers are British made).
1 Pot boiler or Haycock boiler: a primitive kettle where a fire heats a partially filled water container from below. 18th century Haycock boilers generally produced and stored large volumes of very low-pressure steam, often hardly above that of the atmosphere. 2  These could burn wood or most often, coal.