No central heating, can I connect radiator direct to boiler

Hi,
This site has been great for me so far and I hope it helps me here. I’ve no plumbing knowledge so forgive me if the question seems obvious.
I live in the south of Spain, there is no central heating in my house. I have installed a couple of split acs in the bedrooms mainly to cool the house in the summer but I have been using them for the warmth in winter too. Now I need something more substantial.
I wanted to know if a pellet stove could be fitted direct to my boiler? I have an Aparici eco 100l boiler.
I also wanted to know if I could then connect a central heating loop to this boiler to heat 3 or 4 radiators in bedrooms.
Obviously I will need to build a flue.
I am thinking this would be a fairly economical model, all advice/comments/criticisms welcome!

thanks

That's not a boiler, it's a water heater, and no you can't connect radiators or a pellet stove to it. You could fit a pellet stove to power your radiators though

Thanks, so I would need a separate boiler installed where the pellet stove would heat the water? Or maybe easier to change the heater to a boiler?