{"id":5653,"date":"2026-11-12T11:40:09","date_gmt":"2026-11-12T10:40:09","guid":{"rendered":"https:\/\/solquality.es\/how-much-an-aerothermal-heat-pump-uses-in-winter-and-what-it-costs-to-heat-a-home\/"},"modified":"2026-11-12T12:27:40","modified_gmt":"2026-11-12T11:27:40","slug":"air-source-heat-pump-consumption-winter","status":"publish","type":"post","link":"https:\/\/solquality.es\/en\/air-source-heat-pump-consumption-winter\/","title":{"rendered":"How much an air-source heat pump uses in winter and what it costs to heat a home"},"content":{"rendered":"<p>An air-source heat pump (known in Spain as aerotermia) uses between 500 and 2,800 kWh of electricity over a winter to heat a home, depending on its size, its insulation and the local climate. At this autumn&#8217;s electricity prices, that works out at between \u20ac125 and \u20ac700 per heating season. On the Costa del Sol the figure is at the low end of the range; in inland Andalusia, at the high end.<\/p>\n<p>In this guide we explain where those numbers come from, how to work out your own and how much the same heat would cost with gas, heating oil or electric radiators.<\/p>\n<h2>How many kWh an air-source heat pump uses in winter<\/h2>\n<p>The electricity an air-source heat pump uses is the heat your home needs divided by the efficiency of the unit:<\/p>\n<p><strong>Electricity used (kWh) = heat the home needs (kWh) \u00f7 SCOP<\/strong><\/p>\n<p>SCOP is the heat pump&#8217;s average efficiency over the whole heating season. A SCOP of 4 means that for every kWh of electricity you pay for, the unit delivers 4 kWh of heat. The other 3 it takes from the outside air. Current units range between 3.5 and 4.5, and exceed that in mild climates with underfloor heating.<\/p>\n<p>The heat a home needs depends mainly on three things: floor area, insulation and climate. That&#8217;s why two houses with the same unit can have very different bills.<\/p>\n<table>\n<thead>\n<tr>\n<th>Example home<\/th>\n<th>Heat needed over the winter<\/th>\n<th>SCOP<\/th>\n<th>Electricity used<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>90 m\u00b2 flat in M\u00e1laga, average insulation<\/td>\n<td>2,250 kWh<\/td>\n<td>4.5<\/td>\n<td>500 kWh<\/td>\n<\/tr>\n<tr>\n<td>200 m\u00b2 villa in Marbella, average insulation<\/td>\n<td>6,000 kWh<\/td>\n<td>4.5<\/td>\n<td>1,330 kWh<\/td>\n<\/tr>\n<tr>\n<td>150 m\u00b2 house in Granada, average insulation<\/td>\n<td>10,500 kWh<\/td>\n<td>3.8<\/td>\n<td>2,760 kWh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>These are guideline figures for heating only. We have assumed a demand of 25 to 30 kWh per square metre on the coast and 70 kWh per square metre in Granada, where winter is longer and colder.<\/p>\n<h3>How much it uses per day in the coldest month<\/h3>\n<p>January accounts for roughly a quarter of the year&#8217;s heating costs. With the same examples, daily consumption that month is around:<\/p>\n<ul>\n<li><strong>90 m\u00b2 flat in M\u00e1laga:<\/strong> about 4 kWh a day.<\/li>\n<li><strong>200 m\u00b2 villa in Marbella:<\/strong> about 11 kWh a day.<\/li>\n<li><strong>150 m\u00b2 house in Granada:<\/strong> about 22 kWh a day.<\/li>\n<\/ul>\n<h3>And hot water<\/h3>\n<p>Domestic hot water adds up all year round, not just in winter. A family of four needs about 2,100 kWh of heat a year for showers and washing up. With an air-source heat pump, that&#8217;s around 700 kWh of electricity, about \u20ac15 a month.<\/p>\n<h2>How much it costs to heat a home with an air-source heat pump<\/h2>\n<p>To convert kWh into euros, just multiply by the price of electricity. We use \u20ac0.25 per kWh as a reference, which is the average price of the regulated tariff (PVPC) in October 2026, taxes included. It&#8217;s the highest since 2023, so the calculation is conservative.<\/p>\n<table>\n<thead>\n<tr>\n<th>Example home<\/th>\n<th>Winter cost<\/th>\n<th>January cost<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>90 m\u00b2 flat in M\u00e1laga<\/td>\n<td>\u20ac125<\/td>\n<td>\u20ac31 (\u20ac1 a day)<\/td>\n<\/tr>\n<tr>\n<td>200 m\u00b2 villa in Marbella<\/td>\n<td>\u20ac333<\/td>\n<td>\u20ac83 (\u20ac2.70 a day)<\/td>\n<\/tr>\n<tr>\n<td>150 m\u00b2 house in Granada<\/td>\n<td>\u20ac691<\/td>\n<td>\u20ac173 (\u20ac5.60 a day)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>If you have a cheaper fixed-price tariff, or if part of that consumption is covered by your solar panels, the cost falls in the same proportion. You can compare options on our page about <a href=\"https:\/\/solquality.es\/en\/light-and-energy-rates-for-homes-and-self-consumption\/\">electricity rates<\/a>.<\/p>\n<h2>Heat pump, gas, heating oil or radiators: what the same heat costs<\/h2>\n<p>The fair way to compare systems is to look at how much each kWh of heat delivered to the home costs, not each kWh you buy. At autumn 2026 prices, taxes included:<\/p>\n<table>\n<thead>\n<tr>\n<th>System<\/th>\n<th>Cost per kWh of heat<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Heat pump with SCOP 4.5<\/td>\n<td>5.6 cents<\/td>\n<\/tr>\n<tr>\n<td>Heat pump with SCOP 4<\/td>\n<td>6.3 cents<\/td>\n<\/tr>\n<tr>\n<td>Natural gas boiler, regulated tariff<\/td>\n<td>7.4 cents<\/td>\n<\/tr>\n<tr>\n<td>Heat pump with SCOP 3<\/td>\n<td>8.3 cents<\/td>\n<\/tr>\n<tr>\n<td>Heating oil boiler<\/td>\n<td>16.7 cents<\/td>\n<\/tr>\n<tr>\n<td>Electric radiators<\/td>\n<td>25 cents<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Applied to the three example homes, the winter would cost:<\/p>\n<table>\n<thead>\n<tr>\n<th>Example home<\/th>\n<th>Heat pump<\/th>\n<th>Natural gas<\/th>\n<th>Heating oil<\/th>\n<th>Electric radiators<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>90 m\u00b2 flat in M\u00e1laga<\/td>\n<td>\u20ac125<\/td>\n<td>\u20ac167<\/td>\n<td>\u20ac376<\/td>\n<td>\u20ac563<\/td>\n<\/tr>\n<tr>\n<td>200 m\u00b2 villa in Marbella<\/td>\n<td>\u20ac333<\/td>\n<td>\u20ac444<\/td>\n<td>\u20ac1,002<\/td>\n<td>\u20ac1,500<\/td>\n<\/tr>\n<tr>\n<td>150 m\u00b2 house in Granada<\/td>\n<td>\u20ac691<\/td>\n<td>\u20ac777<\/td>\n<td>\u20ac1,754<\/td>\n<td>\u20ac2,625<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Three takeaways from the table:<\/p>\n<ul>\n<li><strong>Compared with heating oil and electric radiators, a heat pump costs around a third and a quarter as much, respectively.<\/strong> This is where switching makes the biggest difference, and it&#8217;s the case for many villas with an old boiler.<\/li>\n<li><strong>Compared with regulated natural gas the difference is smaller<\/strong>, because that tariff&#8217;s price is currently capped. On the other hand, by getting rid of gas you stop paying its fixed charge, which is over \u20ac8 a month before tax.<\/li>\n<li><strong>A poorly set-up heat pump loses its advantage.<\/strong> With a SCOP of 3, heat costs more than with regulated gas. The installation and the controls matter as much as the unit itself.<\/li>\n<\/ul>\n<h2>Why a heat pump uses more when it&#8217;s colder<\/h2>\n<p>The heat pump draws energy from the outside air. The colder that air is, the harder the compressor works to deliver the same heat. A unit that performs at around 4.5 at 7 \u00b0C outside drops towards 3 when the thermometer falls below zero.<\/p>\n<p>That&#8217;s why climate matters so much. On the Costa del Sol, winter lows rarely drop below 5 \u00b0C, frost is exceptional and the unit almost always works in its best range. It&#8217;s one of the reasons why <a href=\"https:\/\/solquality.es\/en\/installation-of-an-air-source-heat-pump-in-marbella-2\/\">air-source heat pumps in Marbella<\/a> perform better than almost anywhere else in Spain.<\/p>\n<p>In inland areas with frequent frost the unit keeps working without any problem, but it should be sized properly so that it doesn&#8217;t rely on the backup electric heater on the coldest nights.<\/p>\n<h2>What makes a heat pump use more or less<\/h2>\n<ul>\n<li><strong>Water temperature.<\/strong> Underfloor heating works with water at around 35 \u00b0C, while conventional radiators need 55 \u00b0C or more. The hotter the water has to be, the less efficient the heat pump. Low-temperature radiators or fan coils recover a good part of the difference.<\/li>\n<li><strong>Insulation.<\/strong> Windows, roof and fa\u00e7ade determine how much heat escapes. It&#8217;s the factor that makes the biggest difference from one bill to another.<\/li>\n<li><strong>The temperature you set.<\/strong> Each extra degree on the thermostat raises consumption by around 7%. Between 20 and 21 \u00b0C is enough to be comfortable.<\/li>\n<li><strong>Switching on and off.<\/strong> A heat pump uses less keeping a steady temperature than warming up a cold house several times a day.<\/li>\n<li><strong>Unit size.<\/strong> An oversized unit keeps starting and stopping; an undersized one leans on the backup heater. Both use more than they should.<\/li>\n<li><strong>Hot water timing.<\/strong> Heating the tank at midday, when the air is milder and electricity is cheaper, costs less than doing it in the early hours.<\/li>\n<\/ul>\n<h2>How to cut consumption with solar panels<\/h2>\n<p>Every kWh the heat pump takes from your panels instead of the grid is a kWh you don&#8217;t pay for. Because a heat pump runs on electricity, it&#8217;s the heating system that gets the most out of <a href=\"https:\/\/solquality.es\/en\/solar-panels\/\">solar panels<\/a>.<\/p>\n<p>In winter the key is to shift consumption to the sunny hours:<\/p>\n<ol>\n<li>Schedule hot water between 12:00 and 16:00.<\/li>\n<li>Turn the heating up one degree at midday and let the house store that heat for the evening. It works especially well with underfloor heating.<\/li>\n<li>If you&#8217;re on a time-of-use tariff, those same midday hours are also the cheapest from the grid.<\/li>\n<\/ol>\n<p>The same unit gives you cooling in summer, when solar production peaks. We explain it in <a href=\"https:\/\/solquality.es\/en\/can-you-run-air-conditioning-on-solar-panels\/\">can you run air conditioning on solar panels?<\/a>. And if you&#8217;re weighing up the combined investment, here&#8217;s <a href=\"https:\/\/solquality.es\/en\/how-many-years-solar-panels-pay-for-themselves\/\">how many years solar panels take to pay for themselves<\/a>.<\/p>\n<h2>Frequently asked questions about heat pump consumption<\/h2>\n<h3>How many kWh does an air-source heat pump use per day in winter?<\/h3>\n<p>Between 4 and 22 kWh a day in the coldest month, depending on the home and the area. A flat on the Andalusian coast is at the low end and a detached house inland at the high end.<\/p>\n<h3>How much does a heat pump add to the electricity bill?<\/h3>\n<p>Between \u20ac30 and \u20ac175 in the coldest month at autumn 2026 electricity prices. In return, the gas bill or the cost of filling the heating oil tank disappears.<\/p>\n<h3>Is it cheaper to heat a home with a heat pump than with gas?<\/h3>\n<p>Yes, when the unit is properly installed: with a SCOP of 4 or more, a kWh of heat costs less than with a gas boiler on the regulated tariff. The difference is much bigger compared with heating oil and electric radiators.<\/p>\n<h3>Does a heat pump use more with radiators than with underfloor heating?<\/h3>\n<p>Yes. Conventional radiators need hotter water, which lowers the heat pump&#8217;s efficiency. With low-temperature radiators or fan coils the difference shrinks.<\/p>\n<h3>Does an air-source heat pump work in sub-zero temperatures?<\/h3>\n<p>Yes. Current units provide heat with outdoor temperatures well below zero, although less efficiently. On the Andalusian coast that situation hardly ever occurs.<\/p>\n<h2>Work out your home&#8217;s consumption<\/h2>\n<p>The numbers in this guide are examples. Your home&#8217;s real consumption depends on its floor area, its insulation, the heat emitters and your schedule. At SolQuality we do that calculation free of charge before proposing a unit, whether you want <a href=\"https:\/\/solquality.es\/en\/installation-of-an-air-source-heat-pump\/\">an air-source heat pump<\/a> on its own or combined with solar panels.<\/p>\n<p><a href=\"https:\/\/solquality.es\/en\/contact\/\">Request your free assessment<\/a> or first check our <a href=\"https:\/\/solquality.es\/en\/frequently-asked-questions-about-air-source-heat-pumps\/\">air-source heat pump FAQs<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>An air-source heat pump (known in Spain as aerotermia) uses between 500 and 2,800 kWh of electricity over a winter to heat a home, depending on its size, its insulation and the local climate. At this autumn&#8217;s electricity prices, that works out at between \u20ac125 and \u20ac700 per heating season. On the Costa del Sol [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":5654,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[85],"tags":[],"class_list":["post-5653","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-air-source-heat-pumps"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Air-source heat pump consumption in winter: kWh and euros | SolQuality<\/title>\n<meta name=\"description\" content=\"An air-source heat pump uses 500 to 2,800 kWh per winter for heating, depending on the home and climate. 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