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From: john larkin <jl@glen--canyon.com>
Newsgroups: sci.electronics.design
Subject: Re: Product idea
Date: Wed, 12 Feb 2025 10:43:53 -0800
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On Wed, 12 Feb 2025 18:27:09 -0000 (UTC), bp@www.zefox.net wrote:

>Carlos E.R. <robin_listas@es.invalid> wrote:
>>> 
>>> Couldn't you burn gas, boil water, spin a generator to make
>>> electricity, and heat your house with the condensate heat?
>>> 
>>> That would make free electricity.
>> 
>> Certainly, and it has a name. Combined cycle, or something similar. It 
>> is a simple as running a diesel generator and heating the house with it 
>> radiator, and a heat exchanger on the exhaust.
>
>Long ago there was a residential product introduced:
>https://hondanews.com/en-US/releases/honda-and-climate-energy-begin-retail-sales-of-freewatt-micro-chp-home-heating-and-power-system
>
>Far as I know it failed commercially, but it's unclear what went wrong.
>Capital cost might have been the stumbling block, as it surely would
>be with a crypo-mining heater. A few kW of computers costs much more
>than a few kW of nichrome wire resistance elements. 
>
>Thanks for reading,
>
>bob prohaska

It doesn't say what the fuel source is. Does it burn gas, or is it an
electrically powered heat pump?