While we have never had an open fire place before, we have had a wood burning stove/heater and are planning to put one in the house we are building this year. They are just beautiful and give that gentle, bone-warming heat throughout the house. They are possibly easier to clean than an open,with the fire and ash being behind the glass door, though I guess I can't really comment. I would strongly recommend you buy one with the fan attachment as this greatly improves the throw out of the warmed air and certainly, the difference can be felt. They are beautiful visually too and nothing is nicer on a cold Winter day, than to have the fire going and be warm and snug inside. Good luck; I hope that helps.

Great looking fireplace you have there! I agree it looks Art Deco and placed in the corner of the room, it makes me think your house is older than 50yrs. I'd guess it was built more like in the 1930 -40's. The gas heater and tiles looks like they were installed around the 60's. And the original tiles were ripped up and replaced with the ones you see. The rubble-y area on the side was I believe the original hearth. The new tiles didn't quite line up with the old. And no doubt, modern new wall to wall carpet was installed over it the same time so they didn't worry about it. If it was mine, I'd get a plumber in to disconnect the gas and pull out the heater. I'd then see if the chimney was in working order. Do you have chimneys on the roof you can see? Then replace the tiles and paint the surround. There's a good chance there is a void behind the gas heater. I'd look into making it back to a working fireplace. If not, I'd pop some nicely cut decorative looking logs into the space. You could remove it but it's lovely and the room looks large enough to put a wardrobe over the opposite wall to the bed. Lastly could be a bit of work to remove the wall as I'd expect it is masonry and need to check that it can be taken out without structural damage to the rest of the building. Often these fireplaces were paired up with one in the room behind. Do you have a corner fireplace in the next room?

@wayne For hydronics talk to Gary Flood at the Enter Shop. They are in Melbourne but he has installers everywhere. http://www.enter-shop.com.au/ Alternatively Alex at AJs Plumbing http://www.ajsplumbing.com.au/ We generally do in-slab hydronics but have also done it inside a rammed earth wall (at our office so feel free to come and look) and underneath a timber floor (several times including in our office). Insulation is critical. In a slab make sure you insulate the slab edge as well as the underside. When we talk of hydronics we generally use heat pumps to create the hot water (it's free to run if powered by PV). You mentioned wetback stoves (wood powered heating). In my view timber is only a viable option in rural settings. In (sub)urban settings the particulate pollution is a serious health issue and there is a fair chance that at some stage woodstoves will not be permitted by urban Councils. You finished by talking of ducted air conditioning. Regardless of the technology used to generate the heat/coolth, ducted systems are inherently inefficient and, in my view, should be avoided at all costs. The heat pumps can be great but the principle of pushing heated air around requires pump energy (you have to move large volumes of air). Almost all residential installations have flexiduct (not rigid as in commercial offices), the ductwork (aside from a study showing 80% of them did not meet the Australian Standard insulation code) due to its flexi-nature has lots and lots of curves and bends all of which increase the need for pump energy. This is why is it not possible to get a rated systems as you can with a split system; it is totally dependant on installation quality. You also need to be mindful of condensation issues in ductwork as heated air passes through relatively cold roof spaces, again quality of ductwork can be a big factor here.

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