When the ATW Series works harder, it consumes more electricity, which will make it a little more expensive to run than the W Series. That means it needs to work harder to put out the same amount of heat. We know that the ATW Series heat pump is a little less efficient on average than the W Series heat pump. We now know that, on average, an air source heat pump is less costly to install up front, but what about the month to month costs? Again, this is where efficiency comes in. You can calculate heat pump COP by measuring its inputs and outputs in a laboratory setting, and we’ve measured that the average geothermal heat pump has a COP of 4.00, while the average air source heat pump has a COP that goes up and down, but averages around 2.9 for the whole year’s temperature fluctuations.Īs a result, you can safely say that a geothermal heat pump is more efficient than an air source heat pump. A heat pump’s COP is a measure of the heat pump’s output compared to the amount of energy required to produce that output. EfficiencyĪ heat pump’s efficiency is how much heat it can produce compared to the energy required to run it. We measure a heat pump’s efficiency using a formula called coefficient of performance (COP). In terms of what the heat pumps can provide, they are very similar. Both units are fully reversing to provide chilled water for air conditioning via a hydronic air handler, and both units come with a desuperheater as standard equipment for domestic hot water preheating. Abilityīoth the W Series heat pump and the ATW Series heat water up to 120☏ for radiant in-floor heating. The cost for the indoor components including the hydronic piping and the indoor portion of both types of heat pumps is about the same. Since there is no excavation, the initial cost of an air source heat pump is less than a geothermal heat pump. Instead, the part of the heat pump that harvests heat sits outside the home on a concrete slab, as pictured below. There is no geothermal ground loop, which means no excavation or vertical drilling. In contrast, an air source heat pump harvests heat from the outdoor air. This adds to the geothermal heat pump cost. Installing a ground loop requires excavation or vertical borehole drilling, depending on how much space is available to you. In the winter, the liquid in the pipes absorbs the low-grade heat from the ground, and the geothermal heat pump extracts that heat and transfers it into your home. A ground loop is plastic piping buried in the earth with a food-grade antifreeze solution circulating through it. It does this by extracting heat from a geothermal ground loop. The W Series heat pump is a geothermal heat pump which means it harvests its heat from the ground. The major difference between the W Series heat pump and the ATW Series heat pump is how they harvest their heat. Here are the different factors you need to consider when choosing between these two types of heat pumps: Initial Cost These two types of heat pumps each have their pros and cons and are best suited to certain homes. If you choose to use a heat pump, there are two primary types you can use: a water to water heat pump (such as the Nordic W Series), or an air to water heat pump (like the Nordic ATW Series). There are many ways to heat the fluid, from an electric boiler, by using fossil fuels, or by using a heat pump. This method of home heating is efficient, silent, and very comfortable. The heated fluid then radiates heat into the concrete, warming your floors and your home. Hydronic in-floor heating is achieved by casting piping into concrete and circulating a heated fluid through the piping. We’re going to focus on hydronic heating. There are two primary types of modern in-floor heating: electric resistance heating, and hydronic heating. Radiant in-floor heating, also sometimes called underfloor heating, is gaining popularity in Canada and is an efficient, silent, and comfortable way to heat your home. You’ll also need to take into consideration what type of distribution system and energy supply source you have available.Īs part of a new series on choosing a heat pump for your home, today we’re going to focus on choosing the right heat pump for radiant in-floor heating. There are many factors to consider including initial cost, efficiency, monthly cost, and comfort. Choosing the right head pump for your home is not an easy feat.
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