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[Marleywood]

Quick question - What's heating your domestic hot water (DHW)?  If you have on-demand from the oil burner, then it will fire occasionally to keep the water hot enough for bathing, washing, etc...  Roger

Ahhhh, that might be the ticket!  Yes, I imagine the hot water is still calling on the oil burner ....

[Roger2561]

If I was a betting man, I'd put my money on it.  Roger

[hondaracer2oo4]

I guess things are good or we would have heard back.

[Marleywood]

I guess things are good or we would have heard back.

Ha, sorry, I got distracted with issues with my snow plow truck & a couple of storms.  It's pretty wintery up here in the NH mountains at the moment.

Furnace seems to doing well.   

[Roger2561]

I guess things are good or we would have heard back.

Ha, sorry, I got distracted with issues with my snow plow truck & a couple of storms.  It's pretty wintery up here in the NH mountains at the moment.

Furnace seems to doing well.   

    

[Marleywood]

So, rolling along nicely.

I was watching a TV show the other day where they were doing a pit pig roast, and they had these big, almost bowling ball size pieces of lava rock that they put in the pit with the coals to help retain heat (like on a propane BBQ grill, but bigger scale).  Has anyone done this with a wood furnace?  It it crazy?  Would it work?   

[mlappin]

So, rolling along nicely.

I was watching a TV show the other day where they were doing a pit pig roast, and they had these big, almost bowling ball size pieces of lava rock that they put in the pit with the coals to help retain heat (like on a propane BBQ grill, but bigger scale).  Has anyone done this with a wood furnace?  It it crazy?  Would it work?   

Don’t see the point myself, thats what your coal bed and the ashes it holds is for.


If you’re stove already uses firebrick then thats what the firebrick is for.


On the other hand, I can’t see the harm in trying.

[E Yoder]

 

[Marleywood]

Don’t see the point myself, thats what your coal bed and the ashes it holds is for.

If you’re stove already uses firebrick then thats what the firebrick is for.

On the other hand, I can’t see the harm in trying.

I just thought the rocks might help the coal bed retain heat and possibly require less fuel.   I'm not sure what "firebrick" is, or whether I have it, if so, it's not in the firebox itself.  As I've said, I'm a N00b.

[E Yoder]

The Classic wouldn't have firebrick, I think.

The lava rock would retain some heat, but I'd think it would just be a nuisance in the firebox for wood loading and raking ash. BBQ 's are a bit different in that they're trying really hard to avoid temp fluctuations . In your furnace it doesn't matter. The ash around the coals does retain heat very well.
To really change your firebox temperatures you would have to fire brick it all the way up the sides and across the top to keep the heat from being absorbed into the water jacket. But then your exhaust temps would go a lot higher and you would need a better heat exchanger on the exhaust which the classic doesn't have.
One thing affects the next. Never as simple as it looks on the surface but lots of fun.

[Marleywood]

Thanks for the input.  We have been enjoying heating with the wood furnace this winter.