The aim of the study was to evaluate the influence of different temperature control systems on the voluntary feed intake (VFI), percentage of weight loss (PWL) and performance of lactating sows as well as on the weight of their piglets. Two systems were used: traditional temperature control system (TTCS) with curtain management and an evaporative snout cooling system (ESCS RESUMO O objetivo do estudo foi avaliar a influência de diferentes sistemas de controle de temperatura sobre o consumo voluntário de ração (VFI), porcentagem de peso perdido (PWL) e desempenho de fêmeas lactantes e de suas leitegadas. Dois sistemas foram utilizados no estudo: o sistema tradicional de controle de temperatura (TTCS), com manejo de cortina e o sistema de resfriamento adiabático evaporativo (ESCS). O estudo foi realizado no verão de 2011. Após o parto e ao desmame, 241 fêmeas foram pesadas e foi avaliado o PWL durante a lactação. Fêmeas TTCS perderam mais peso (5,3±0,9%; P<0,05) do que as fêmeas ESCS (2,2±0,9%). VFI foi medido em intervalos de quatro dias em 32 fêmeas primíparas e 39 multíparas. Fêmeas ESCS tiveram maior VFI (5,8±0,2kg -1 dia; P<0,05) do que fêmeas TTCS (4,8±0,2 kg dia -1 ). Primíparas (4,4±0,2kg dia -1 ) tiveram menor VFI
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