Sealed System Heating Sealed systems usually come in two different forms: Low-pressure-vented systems and high-pressure-unvented systems.

Plastic pipe systems have been widely used in domestic hot and cold water supply and central heating systems for over 50 years, so are not a ‘new’ solution; they have an excellent track record ...

Dear Action Line: I noticedthe Friday World's tips on preventing fires and carbon monoxide poisoning didn't mention the "unvented gas logs"that people are using to takethe chill off. These burn ...