clwestphal Posted January 18, 2019 Share Posted January 18, 2019 Can anyone recommend a tankless hot water heater for preheating my mash water? Looking for something that will heat up to 175 degrees. Thanks for any input. Link to comment Share on other sites More sharing options...
Thatch Posted January 18, 2019 Share Posted January 18, 2019 Happy with our A.O. Smith https://www.build.com/ao-smith-atio-910-an/s1329791?uid=3167497 Heavy Duty, industrial, really does the job. Link to comment Share on other sites More sharing options...
Patio29Dadio Posted January 19, 2019 Share Posted January 19, 2019 I have been using Rinnai for years and with no problems. FOR INDOOR APPLICATIONS ONLY RUC80i .................. REU-KBD2530FFUD-US RUC90i .................. REU-KBD2934FFUD-US RUC98i .................. REU-KBD3237FFUD-US FOR OUTDOOR APPLICATIONS ONLY RU80e ................... REU-KB2530WD-US RU90e ................... REU-KB2934WD-US RU98e ................... REU-KB3237WD-US Link to comment Share on other sites More sharing options...
Skaalvenn Posted January 19, 2019 Share Posted January 19, 2019 Thanks! This is exactly what we are looking for as well. Is anyone here from the north where tap water is 45-50 degrees in winter? Wondering if one unit will be enough at decent flow rate, or if I'll have to run two in series. Link to comment Share on other sites More sharing options...
Thatch Posted January 19, 2019 Share Posted January 19, 2019 7 hours ago, Skaalvenn said: Wondering if one unit will be enough Our water temp is 47 now and will get lower. I guess it all depends on how much you want to mash. Our tun is 550 gallons and we are 100% barley malt. We use a grist hydrator and the flow rate is what we need to match the water flow with the malt flow and prevent clumping. Link to comment Share on other sites More sharing options...
Dehner Distillery Posted January 24, 2019 Share Posted January 24, 2019 Hot water heater??? Why do you want to heat hot water??? LOL, hahahaha Link to comment Share on other sites More sharing options...
Southernhighlander Posted January 25, 2019 Share Posted January 25, 2019 Have you ever thought of using the hot water from your stills condensers? Link to comment Share on other sites More sharing options...
Skaalvenn Posted January 25, 2019 Share Posted January 25, 2019 50 minutes ago, Southernhighlander said: Have you ever thought of using the hot water from your stills condensers? We did this in the past on smaller runs, but we usually have about about 40-60gph of cool water circulating through the still so it would take 8 hours of running (not realistic) to fill a mash tun (and the water would cool substantially in that time). Also, if I can mash 8 hours quicker, I can distill it 8 hours quicker. Those hours add up over the months. Link to comment Share on other sites More sharing options...
Southernhighlander Posted January 25, 2019 Share Posted January 25, 2019 15 minutes ago, Skaalvenn said: We did this in the past on smaller runs, but we usually have about about 40-60gph of cool water circulating through the still so it would take 8 hours of running (not realistic) to fill a mash tun (and the water would cool substantially in that time). Also, if I can mash 8 hours quicker, I can distill it 8 hours quicker. Those hours add up over the months. Several of my customers are running their hot condenser water into hot water holding tanks that are insulated and some of that water is used for mashing in, however it is going into corn mash tuns, that have steam or baine marie jackets, at 130 to 140 f and then everything is heated up to 185 to 190F and cooked at that temp. This saves them a great deal of energy and time verses starting with 60F tap water. It sounds like you are using the strike water method so I can see how reclaiming condenser water would not work for you. Thank you. Link to comment Share on other sites More sharing options...
sandytoes Posted January 25, 2019 Share Posted January 25, 2019 We have a Rennai reu-np3237w-us. Works great and was free after rebate from our local gas company. Link to comment Share on other sites More sharing options...
Buckeye Hydro Posted March 11, 2019 Share Posted March 11, 2019 Just a heads up - look carefully at the water quality requirements on the tankless heaters. Some pretreatment of the water may be needed. russ Link to comment Share on other sites More sharing options...
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