The off-putting smells of metal or rotten eggs may indicate a possible gas leak. If this smell is ... such as leaks or ...

Unlike gas boilers, heat pumps do not rely on dirty ... heat pumps work like an air conditioner or refrigerator but with a reversing valve that allows them to heat and cool, per National Grid.

The off-putting smells of metal or rotten eggs may indicate a possible gas leak ... pressure relief valves. "This may result in inefficient heating and potential boiler component damage.