attemperator
(əˈtɛmpəreɪtə(r))
[n. of agent (after L. analogies) f. L. attemperāre: see above and -or.]
That which attempers; spec. in Brewing, an arrangement for regulating the temperature of the fermenting wort, and of the malting-rooms.
| 1854–7 Muspratt Chem. I. 253/2 The mashing attemperator..can be so managed to preserve the heat at any temperature. 1876 Encycl. Brit. (ed. 9) IV. 275 The attemperator consists of a series of pipes fixed within the tun..It should be possible to run hot or cold water through these pipes. |