homeassistant

You mean like all of the millions of them in every house, building, business around the world?

If it's 240, it's installed. It'll require a proper 240 circuit for its type, not something the average homeowner can do, so an electrician will be necessary.

Technically, pretty much every heater is "remote" (except portables). Or do you crawl into your attic or crawl space whenever you want to adjust the temp?

Do you turn off your heat when you leave the house? Water heater?

Business have used heat and cooling on timer and remote systems for 75+ years, and here you come fear-mongering some nonsense about "remote heaters".

Moreover, an electric hearer is about as safe as you can get - nothing being oxidized, the heater element is well shielded, with a compressor type fan pushing air through it.

If the fan stops, the unit stops. If the heater stops, the fan stops, it's all tied together with controls that have been around since the 50's (and mostly now electronic). Even controls from back then are crazy robust and simple.

A gas heater won't even attempt to fire if it doesn't detective negative pressure in the chamber, which would mean the exhaust blower isn't running. And we're not talking gas here, so the controllers even simpler.