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Variable speed significantly reduces pump consumption.</p><div class="cta-row"><a class="pill" href="/glaesern/piscine/">← Pool</a></div></div></section><section class="section reveal"><div class="s-inner"><div class="s-eyebrow">Calculateur</div><h2>Energy costs of a swimming pool: filtration and heating</h2><p class="lead">Default values for example — replace them with your own, nothing is saved.</p><div style="display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin:1rem 0"><label style="display:flex;flex-direction:column;gap:.3rem;font-size:.9rem;font-weight:600">Pump power<span style="font-weight:400;color:#888;font-size:.8rem">kW</span><input type="number" id="ppompe" value="8" oninput="calc()" style="border:1px solid #ddd;border-radius:10px;padding:.55rem .7rem;font-family:monospace;font-size:1rem;text-align:right"></label><label style="display:flex;flex-direction:column;gap:.3rem;font-size:.9rem;font-weight:600">Hours of operation / day<span style="font-weight:400;color:#888;font-size:.8rem">h/j</span><input type="number" id="hfiltr" value="12" oninput="calc()" style="border:1px solid #ddd;border-radius:10px;padding:.55rem .7rem;font-family:monospace;font-size:1rem;text-align:right"></label><label style="display:flex;flex-direction:column;gap:.3rem;font-size:.9rem;font-weight:600">Days of season<span style="font-weight:400;color:#888;font-size:.8rem">j/an</span><input type="number" id="jours" value="300" oninput="calc()" style="border:1px solid #ddd;border-radius:10px;padding:.55rem .7rem;font-family:monospace;font-size:1rem;text-align:right"></label><label style="display:flex;flex-direction:column;gap:.3rem;font-size:.9rem;font-weight:600">Electricity price<span style="font-weight:400;color:#888;font-size:.8rem">c Rs/kWh</span><input type="number" id="elec" value="22" oninput="calc()" style="border:1px solid #ddd;border-radius:10px;padding:.55rem .7rem;font-family:monospace;font-size:1rem;text-align:right"></label><label style="display:flex;flex-direction:column;gap:.3rem;font-size:.9rem;font-weight:600">Savings from variable speed<span style="font-weight:400;color:#888;font-size:.8rem">%</span><input type="number" id="vfd" value="35" oninput="calc()" style="border:1px solid #ddd;border-radius:10px;padding:.55rem .7rem;font-family:monospace;font-size:1rem;text-align:right"></label><label style="display:flex;flex-direction:column;gap:.3rem;font-size:.9rem;font-weight:600">Heating consumption<span style="font-weight:400;color:#888;font-size:.8rem">kW</span><input type="number" id="pchauf" value="30" oninput="calc()" style="border:1px solid #ddd;border-radius:10px;padding:.55rem .7rem;font-family:monospace;font-size:1rem;text-align:right"></label><label style="display:flex;flex-direction:column;gap:.3rem;font-size:.9rem;font-weight:600">Total consumption<span style="font-weight:400;color:#888;font-size:.8rem">h/j</span><input type="number" id="hchauf" value="6" oninput="calc()" style="border:1px solid #ddd;border-radius:10px;padding:.55rem .7rem;font-family:monospace;font-size:1rem;text-align:right"></label></div><div id="cres" style="display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin-top:1rem"></div><div id="cnote" style="margin-top:1rem;font-size:.82rem;color:#888"></div></div></section><section class="section reveal" id="contact"><div class="s-inner"><div class="s-eyebrow">Contact</div><h2>* The variation in speed (VFD) reduces pump consumption more than proportionally. 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