He only has to light it once a day. It channels the heat around the house which it uses as a thermal store and it has an oven too. His project is quite fascinating - made more so by his cinematography skills and lack of words. 

Here's the stove company

If you want to recover heat from a flue, any flue, from a stove, a fired combustion boiler, a gas turbine, you do it with an air to fluid heat recovery exchanger not air to air. The fluid will provide 4x the heat thermal energy per unit of mass flow than air. Eg: a log burner with a built in back boiler, but the regulations on connecting these into CH systems are quite strict.

I'm with the Major on this one, the stove is secondary evening heating as a feature on winter evenings, and usually lit for the benefit of my wife and/or the cat.

Our stove is less than 5kW so doesn’t need a dedicated air vent which for occasional use isn’t efficient. But if we had had a fan distribution system put in from the chimney into the bedroom above (seemed sensible to us, using waste heat) then a dedicated extra vent would have to be fitted in the bedroom which for most of the time would just be a heat loss.

There are a lot of sites which give more information on ventilation requirements this is just one example https://www.homebuilding.co.uk/advice/log-burner-ventilation.

A carbon monoxide detector is always a good idea if you have a stove since heat makes you sleepy anyway. It’s useful to check it’s not dangerous air quality.

Without one it probably needs adding during installation?

I can imagine it works as intended.

The noise from fan might need mitigation?

This season, one load of seasoned logs from my supplier is £190 and that sees me through the whole year including barbecues. If the Recoheat gadget recovers 1kW from my 7kW stove's flue and costs £300 or more before fitting, that's quite a few years before I see the payback. I love the idea of redistributing the heat - indeed I have a stove-top fan for doing exactly that - but it's something of a luxury gadget given my woodburner is only ever for occasional feel-good evenings and the very rare emergency.

looks interesting! anyone tried it?

Claims: pumped-air heat recovery system for domestic stoves distributes the heat from a stove across far greater areas, effectively creating a mini central heating system

https://www.recoheat.co.uk/