Raise Mash Temp

[Murph69]

I’m attempting to raise my mash temp from 152 to mash out of 170 using my coil in my HLT - thus, recirculating the wort using my pump thru the coil.

Looking for a formula that will tell me the temperature of the required temp in my HLT to bring my mash temp up to 170

Cheers,
James

 

[day_trippr]

The "formula" for the minimum is to note the temperature of your HLT while maintaining a steady 152°F mash temperature, and add 18°F to that.
If you want to accelerate the mash temperature rise, start out even hotter then back down to that number...

Cheers!

 

[Murph69]

I was thinking about boiling water to top up what’s remaining in my HLT, then start recirculating at 170

is there any risk to using a higher temp to bring mash out temp up quicker ?

 

[day_trippr]

Adding boiling water to the HLT would work I suppose, if it has sufficient room for the necessary addition.
As for any "risk", as long as you don't overshoot the mash out temperature significantly I don't think the ramp steepness matters...

Cheers!