Gas Boiler, Electric Boiler

[rautesamtr]

Before submitting a new icon request, please confirm the following:

• [X] I have searched all issues to make sure there isn't a request for this icon.
• [X] I have searched the current library to make sure the icon doesn't already exist.
• [X] I understand that brand icons are no longer being added and I can use SimpleIcons for my brand icon needs.
• [X] I only intend to request a single icon (or a few near-identical ones) in this issue.

What would you use this icon for?

Home Assistant icon for my gas boiler switch. The current water-boiler/water-heater icon is a bit to generic and hard to read. Appended are two suggestions or possible submissions for more specific cases e.g. a boiler that heats by burning fossil fuel and a electric boiler. Both are based on the water boiler icon by Green Turtwig. The gas boiler uses the google fire icon and the electric boiler uses the lightning-bold icon by Brooke Clifton.

Give us an example of what this icon might look like.

[rautesamtr]

Only saw after i opened this issue that there is no interest in getting different powered boilers into the icon set. https://github.com/Templarian/MaterialDesign/issues/4414#issuecomment-530151815

To bad since the water-boiler icon is really hard to interpret.