{"id":259449,"date":"2026-08-07T22:25:00","date_gmt":"2026-08-08T01:25:00","guid":{"rendered":"https:\/\/www.em.com.br\/emfoco\/?p=259449"},"modified":"2026-08-06T13:46:42","modified_gmt":"2026-08-06T16:46:42","slug":"uma-torneira-eletrica-ligada-1-hora-por-dia-pode-custar-r-656-na-conta-de-luz-ao-longo-de-1-ano","status":"publish","type":"post","link":"https:\/\/www.em.com.br\/emfoco\/2026\/08\/07\/uma-torneira-eletrica-ligada-1-hora-por-dia-pode-custar-r-656-na-conta-de-luz-ao-longo-de-1-ano\/","title":{"rendered":"Uma torneira el\u00e9trica ligada 1 hora por dia pode custar R$ 656 na conta de luz ao longo de 1 ano"},"content":{"rendered":"\n<div class=\"emf-summary google-auto-ads-ignore\">\n  <style>\n    .emf-summary {\n      --emf-navy:#00245a;\n      --emf-navy-soft:#0b3b70;\n      --emf-ink:#1d2731;\n      --emf-muted:#66727e;\n      --emf-line:#d7dde5;\n      --emf-paper:#ffffff;\n      --emf-wash:#f4f6f8;\n      box-sizing:border-box!important;\n      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20px;\n      overflow:hidden!important;\n      background:#fff;\n      border-inline-end:1px solid var(--emf-line);\n    }\n\n    .emf-summary-card:last-child {\n      border-inline-end:0;\n    }\n\n    .emf-summary-number {\n      position:absolute;\n      inset-block-start:13px;\n      inset-inline-end:15px;\n      color:rgba(0,36,90,.10);\n      font-family:Georgia,\"Times New Roman\",serif;\n      font-size:46px;\n      font-weight:700;\n      line-height:1;\n      pointer-events:none;\n    }\n\n    .emf-summary-card-title {\n      position:relative;\n      z-index:1;\n      margin:0 0 11px;\n      padding-block-end:10px;\n      color:var(--emf-navy);\n      border-block-end:2px solid var(--emf-navy);\n      font-family:Georgia,\"Times New Roman\",serif;\n      font-size:18px;\n      font-weight:700;\n      line-height:1.3;\n      overflow-wrap:anywhere;\n    }\n\n    .emf-summary-card-text {\n      position:relative;\n      z-index:1;\n      color:#485560;\n      font-size:13px;\n 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block-size:52px;\n        flex-basis:52px;\n      }\n\n      .emf-summary-logo img {\n        inline-size:41px;\n        block-size:41px;\n        max-inline-size:41px;\n        max-block-size:41px;\n      }\n\n      .emf-summary-title {\n        font-size:22px;\n      }\n\n      .emf-summary-card {\n        padding:21px 16px 18px;\n      }\n    }\n  <\/style>\n\n  <div class=\"emf-summary-brand\">\n    <div class=\"emf-summary-logo\">\n      <img\n        alt=\"Logo EM Foco\"\n        decoding=\"async\"\n        fetchpriority=\"high\"\n        height=\"46\"\n        loading=\"eager\"\n        referrerpolicy=\"no-referrer\"\n        src=\"https:\/\/www.em.com.br\/emfoco\/wp-content\/uploads\/2026\/08\/em_transparente_3000px-scaled.png\"\n        width=\"46\"\n      >\n    <\/div>\n\n    <div>\n      <div class=\"emf-summary-eyebrow\">EM FOCO<\/div>\n      <div class=\"emf-summary-title\">Resumo da mat\u00e9ria<\/div>\n    <\/div>\n  <\/div>\n\n  <div class=\"emf-summary-grid\">\n    <div class=\"emf-summary-card\">\n      <span aria-hidden=\"true\" class=\"emf-summary-number\">01<\/span>\n      <div aria-level=\"3\" class=\"emf-summary-card-title\" role=\"heading\">\n        Minutos se acumulam\n      <\/div>\n      <div class=\"emf-summary-card-text\">\n        Pequenos per\u00edodos na pia podem somar uma hora di\u00e1ria quando a \u00e1gua quente \u00e9 usada v\u00e1rias vezes para lou\u00e7a, limpeza e higiene.\n      <\/div>\n      <div class=\"emf-summary-card-meta\">\n        Uso fracionado\n      <\/div>\n    <\/div>\n    <div class=\"emf-summary-card\">\n      <span aria-hidden=\"true\" class=\"emf-summary-number\">02<\/span>\n      <div aria-level=\"3\" class=\"emf-summary-card-title\" role=\"heading\">\n        Pot\u00eancia de refer\u00eancia\n      <\/div>\n      <div class=\"emf-summary-card-text\">\n        A simula\u00e7\u00e3o considera uma torneira de 2.000 watts, equivalente a 2 kWh quando permanece aquecendo \u00e1gua por uma hora.\n      <\/div>\n      <div class=\"emf-summary-card-meta\">\n        2 kWh\/h\n      <\/div>\n    <\/div>\n    <div class=\"emf-summary-card\">\n      <span aria-hidden=\"true\" class=\"emf-summary-number\">03<\/span>\n      <div aria-level=\"3\" class=\"emf-summary-card-title\" role=\"heading\">\n        Custo depende da tarifa\n      <\/div>\n      <div class=\"emf-summary-card-text\">\n        Com R$ 0,899 por kWh, o consumo anual de 730 kWh chega perto de R$ 656. A conta local pode ser diferente.\n      <\/div>\n      <div class=\"emf-summary-card-meta\">\n        Estimativa anual\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>torneira el\u00e9trica<\/strong> de 2.000 watts consome 730 kWh somando uma hora diariamente por um ano. Com tarifa simulada de R$ 0,899 por kWh, o custo alcan\u00e7a <strong>R$ 656<\/strong>. Per\u00edodos na pia formam surpreendentemente esse total, embora cada lavagem pare\u00e7a r\u00e1pida, isolada e financeiramente pequena no or\u00e7amento dom\u00e9stico.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Por que a torneira el\u00e9trica soma tanto consumo?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <a href=\"https:\/\/pt.wikipedia.org\/wiki\/Torneira#Torneiras_el%C3%A9tricas\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>torneira el\u00e9trica<\/strong><\/a> aquece a \u00e1gua com uma resist\u00eancia ligada \u00e0 rede. Esse aquecimento exige pot\u00eancia maior que a de muitos aparelhos usados por longos per\u00edodos, embora a torneira normalmente funcione em intervalos curtos durante o dia.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A tabela t\u00e9cnica da <a href=\"https:\/\/www.cemig.com.br\/wp-content\/uploads\/2025\/10\/nd5_1_000001p.docx.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Cemig<\/strong><\/a> usa <strong>2.000 watts<\/strong> como refer\u00eancia para a torneira el\u00e9trica. Isso equivale a 2 kWh em uma hora cont\u00ednua ou a 0,5 kWh durante quinze minutos de funcionamento efetivo.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.em.com.br\/emfoco\/wp-content\/uploads\/2026\/08\/torneia123-1024x576.jpg\" alt=\"\" class=\"wp-image-259493\" srcset=\"https:\/\/www.em.com.br\/emfoco\/wp-content\/uploads\/2026\/08\/torneia123-1024x576.jpg 1024w, https:\/\/www.em.com.br\/emfoco\/wp-content\/uploads\/2026\/08\/torneia123-300x169.jpg 300w, https:\/\/www.em.com.br\/emfoco\/wp-content\/uploads\/2026\/08\/torneia123-768x432.jpg 768w, https:\/\/www.em.com.br\/emfoco\/wp-content\/uploads\/2026\/08\/torneia123-750x422.jpg 750w, https:\/\/www.em.com.br\/emfoco\/wp-content\/uploads\/2026\/08\/torneia123-1140x641.jpg 1140w, https:\/\/www.em.com.br\/emfoco\/wp-content\/uploads\/2026\/08\/torneia123.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Somar alguns minutos de uso ao longo do dia faz diferen\u00e7a na conta<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Como uma hora di\u00e1ria chega a R$ 656?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Primeiro, os <strong>2.000 watts<\/strong> viram 2 kW. Multiplicando por uma hora e por 365 dias, o consumo anual chega a <strong>730 kWh<\/strong>. Essa conta considera que os per\u00edodos separados ao longo do dia totalizam sessenta minutos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Depois, 730 kWh s\u00e3o multiplicados por <strong>R$ 0,899 por kWh<\/strong>. O resultado \u00e9 R$ 656,27, arredondado para R$ 656. O valor pode mudar conforme a tarifa local, os impostos, a bandeira e a pot\u00eancia real indicada no aparelho.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Como pequenos usos viram sessenta minutos?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dez minutos pela manh\u00e3, quinze no almo\u00e7o, vinte no jantar e quinze na limpeza final j\u00e1 somam <strong>uma hora di\u00e1ria<\/strong>. Como cada abertura parece curta, o total costuma ficar escondido at\u00e9 que todos os per\u00edodos sejam anotados e reunidos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O tempo conta apenas enquanto a torneira aquece e libera \u00e1gua. Abrir e fechar repetidas vezes durante a lavagem tamb\u00e9m entra na soma. Um cron\u00f4metro usado por dois ou tr\u00eas dias mostra o <strong>tempo efetivo<\/strong> com mais precis\u00e3o do que uma lembran\u00e7a aproximada.<\/p>\n\n\n\n<p class=\"myth-list-bridge wp-block-paragraph\">A seguir listamos <strong>quatro usos curtos<\/strong> que podem completar uma hora no mesmo dia:<\/p>\n\n\n\n<ul class=\"wp-block-list myth-bullet-list\">\n<li><strong>Caf\u00e9 da manh\u00e3:<\/strong> dez minutos para copos, pratos e utens\u00edlios.<\/li>\n\n\n\n<li><strong>Depois do almo\u00e7o:<\/strong> quinze minutos com panelas e talheres.<\/li>\n\n\n\n<li><strong>Ap\u00f3s o jantar:<\/strong> vinte minutos para a maior carga de lou\u00e7a.<\/li>\n\n\n\n<li><strong>Limpeza final:<\/strong> quinze minutos divididos entre pia e m\u00e3os.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Leia tamb\u00e9m: <a href=\"https:\/\/www.em.com.br\/emfoco\/2026\/08\/04\/o-eletrodomestico-que-muita-gente-usa-com-o-filtro-cheio-e-deve-ser-limpo-apos-cada-ciclo-para-evitar-incendios\/\" target=\"_blank\" rel=\"noreferrer noopener\">O eletrodom\u00e9stico que muita gente usa com o filtro cheio e deve ser limpo ap\u00f3s cada ciclo para evitar inc\u00eandios<\/a><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quanto diferentes rotinas podem custar?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Quinze minutos di\u00e1rios consomem <strong>182,5 kWh por ano<\/strong>, estimados em R$ 164. Meia hora dobra os n\u00fameros para 365 kWh e R$ 328. Quando o total chega a sessenta minutos, consumo e custo dobram novamente, alcan\u00e7ando 730 kWh e R$ 656.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A progress\u00e3o \u00e9 direta porque a pot\u00eancia permanece igual. Assim, reduzir apenas cinco minutos por dia evita cerca de <strong>60,8 horas anuais<\/strong> de funcionamento. Em uma torneira de 2.000 watts, isso representa aproximadamente 121,7 kWh que deixam de entrar na simula\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"myth-html-bridge wp-block-paragraph\">A seguir listamos <strong>tr\u00eas tempos di\u00e1rios<\/strong> que mostram como poucos minutos alteram o gasto anual:<\/p>\n\n\n\n<div class=\"emf-data-table google-auto-ads-ignore\">\n  <style>\n    .emf-data-table {\n      --emf-navy:#00245a;\n      --emf-navy-soft:#0b3b70;\n      --emf-ink:#1d2731;\n      --emf-muted:#66727e;\n      --emf-line:#d7dde5;\n      --emf-wash:#f4f6f8;\n      box-sizing:border-box!important;\n      inline-size:min(1100px,100%)!important;\n      max-inline-size:100%!important;\n      margin-inline:auto!important;\n      overflow:hidden!important;\n      color:var(--emf-ink);\n      background:#fff;\n      border:1px solid var(--emf-line);\n      border-radius:6px!important;\n      box-shadow:0 8px 24px rgba(0,36,90,.08);\n      font-family:Arial,Helvetica,sans-serif;\n    }\n\n 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referrerpolicy=\"no-referrer\"\n        src=\"https:\/\/www.em.com.br\/emfoco\/wp-content\/uploads\/2026\/08\/em_transparente_3000px-scaled.png\"\n        width=\"41\"\n      >\n    <\/div>\n\n    <div>\n      <div class=\"emf-data-table-kicker\">DADOS EM FOCO<\/div>\n      <div class=\"emf-data-table-title\">Custo pelo tempo de torneira ligada<\/div>\n    <\/div>\n  <\/div>\n\n  <div aria-label=\"Cen\u00e1rios de consumo e custo de uma torneira el\u00e9trica\" class=\"emf-data-table-scroll\" role=\"region\" tabindex=\"0\">\n    <table>\n      <caption>Tabela com tempo di\u00e1rio, consumo anual e custo estimado de uma torneira el\u00e9trica de 2.000 watts<\/caption>\n      <thead>\n        <tr>\n          <th scope=\"col\">Tempo di\u00e1rio<\/th>\n          <th scope=\"col\">Consumo anual<\/th>\n          <th scope=\"col\">Custo estimado<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr>\n          <td data-label=\"Tempo di\u00e1rio\">15 minutos<\/td>\n          <td data-label=\"Consumo anual\">182,5 kWh<\/td>\n          <td data-label=\"Custo estimado\">R$ 164<\/td>\n        <\/tr>\n        <tr>\n          <td data-label=\"Tempo di\u00e1rio\">30 minutos<\/td>\n          <td data-label=\"Consumo anual\">365 kWh<\/td>\n          <td data-label=\"Custo estimado\">R$ 328<\/td>\n        <\/tr>\n        <tr>\n          <td data-label=\"Tempo di\u00e1rio\">60 minutos<\/td>\n          <td data-label=\"Consumo anual\">730 kWh<\/td>\n          <td data-label=\"Custo estimado\">R$ 656<\/td>\n        <\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Como reduzir o tempo sem abrir m\u00e3o da \u00e1gua quente?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Separar a lou\u00e7a antes de abrir a \u00e1gua evita pausas com a torneira ligada. Ensaboar v\u00e1rios itens de uma vez e usar \u00e1gua quente apenas quando necess\u00e1ria diminui o <strong>tempo de resist\u00eancia ativa<\/strong>, sem exigir que toda a tarefa seja feita com \u00e1gua fria.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Desse modo, os <strong>R$ 656 ao longo do ano<\/strong> resultam da soma de minutos, pot\u00eancia e tarifa. Medir o uso por alguns dias, organizar a lavagem e consultar a pot\u00eancia do modelo s\u00e3o passos simples para impedir que per\u00edodos curtos virem uma hora di\u00e1ria.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>EM FOCO Resumo da mat\u00e9ria 01 Minutos se acumulam Pequenos per\u00edodos na pia podem somar uma hora di\u00e1ria quando a \u00e1gua quente \u00e9 usada v\u00e1rias vezes para lou\u00e7a, limpeza e higiene. Uso fracionado 02 Pot\u00eancia de refer\u00eancia A simula\u00e7\u00e3o considera uma torneira de 2.000 watts, equivalente a 2 kWh quando permanece aquecendo \u00e1gua por uma [&hellip;]<\/p>\n","protected":false},"author":30,"featured_media":259486,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jnews-multi-image_gallery":[],"jnews_single_post":{"format":"standard"},"jnews_primary_category":[],"jnews_social_meta":[],"jnews_override_counter":[],"footnotes":""},"categories":[28],"tags":[160,868,161,380],"class_list":["post-259449","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-economia","tag-economia","tag-energia","tag-tecnologia","tag-tv"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Uma torneira el\u00e9trica ligada 1 hora por dia pode custar R$ 656 na conta de luz ao longo de 1 ano - Estado de Minas - Em foco<\/title>\n<meta name=\"description\" content=\"Uma torneira el\u00e9trica usada em per\u00edodos curtos pode somar uma hora por dia. 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