Getting a tunnel chimney - is the offer good?

Hello dear forum community,

We received the offer for our tunnel fireplace today, can you tell me if it is good, or if I need to pay attention to anything else?

Glass heating door B67 x H56cm with external fresh air ventilation, self-closing, infrared coated
1299,- net

Heating insert incl. 1 self-closing glass heating door B67 x H56cm, infrared coated glass, fresh air supply with 1 heat exchanger (water output depending on wood throughput 14 - 22kW)
4260,- net

Heating effect 80% water, 20% into the room

Of course, we still have a consultation appointment, but what do you think, what additional costs might come up?? Installation? Approval?? What costs should we expect additionally???

Thank you very much

Somehow the good piece still has to be set – I think built with fireclay.
Something else will come… at the moment it’s just a materials list…
In other finishing trades, the formula material costs = installation costs has often proven true for me…
You shouldn’t also let the connection to the heating system and possibly system-related additional services on the heating technician’s side be overlooked. The thermal drain safety device also still costs something. All in all, I’m calculating a price (just the stove builder) just under 10,000 euros.
But you have also picked out a Mercedes model.

By the way, I find the proportions of the door unfavorable. It looks too square.
Today, people are only used to 16:9.

I also consider the 20% room-side heat output to be somewhat optimistic.

I will bring up the size issue again, I would prefer it elongated as you already mentioned... Can you recommend manufacturers that are not so Mercedes-heavy? This was the first offer, we still have some time, but you have to start somewhere... Of course, we will get more offers... But basically, everything that is needed is included, right????

Do you receive a cookie and/or a range hood? Then a reed contact or a USA at the window is still due.

Are you getting a controlled residential ventilation system and/or a range hood? Then a reed contact or a USA will be required on the window

sorry stupid word recognition on the phone lol.

We will have a decentralized ventilation system and an exhaust hood in the kitchen... Or do you mean something else now????