A pipe or duct that safely removes combustion gases from a boiler, stove or fire.
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Insulation added to a flat roof. It may be installed above, below or within the roof structure depending on the roof type.
Fluorinated greenhouse gas used in some refrigeration, air conditioning and heat pump systems. Some F-gases have high global warming potential.
A heat emitter that uses a fan to move air across a heating or cooling coil.
A retrofit approach that improves the building fabric first, such as insulation, airtightness and ventilation, before changing the heating system.
A fan that removes moist or stale air from rooms such as bathrooms, kitchens and utility rooms.
Insulation fixed to the outside of external walls and finished with render, cladding or another weatherproof layer.
In a heat pump or refrigeration cycle, the expansion valve reduces the refrigerant pressure and temperature before it enters the evaporator.
A vessel in a sealed heating system that absorbs expansion as water heats up.
A retrofit improvement designed to reduce energy use, such as insulation, heating controls, glazing or low-carbon heating.