Where the Heat in Hot Water Actually Comes From
The difference between the two water heaters is where the heat comes from. A gas heater burns fuel to create heat; a heat pump moves heat that already exists in the surrounding air into the water. One converts energy, the other relocates it, which is why their running costs behave differently.
Once that is understood, the rest of the comparison stops being a list of claims and becomes a set of conditions. A device that moves heat needs somewhere to move it from, which is why space, air temperature, and noise all enter a decision that looked purely financial. What stays out of the published version is savings figures for a household: they depend on tariff, climate, existing system, and usage, and a number in a video will be held against an installer who never quoted it.
The comparison is laid out over seven scenes: one on burning against moving heat, two on what each needs installed and where, one on how running costs behave under different tariffs, one on recovery time and household demand, one on noise and siting, and one on the check to run before deciding.
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