Hot water coil immersed in mash tun?

[Denny's Evil Concoctions]

I have a direct fired recirculating mash system.

I'm not a strong believer in continously recirculating the mash as with high gravity beers or wheat beers, this can compact the grain bed excessively.

Wondering if anyone has tried circulating hot water through an immersion coil that is in the mash tun. Would have to be along the walls i suppose or doughing in would be a nightmare.

Not sure if the center of the mash would heat the same as the outside with some recirculating of the mash either.

If this isnt practical i might look into steam but i'd prefer not to gobthat route at this time.

 

[bja]

I've never tried this, but it seems that without some kind of stirring or recirculation, the heating with a coil is going to be very uneven.