Choosing an investment? You've seen on our website that a heat pump is a sensible choice for a new home. We've also mentioned that, in the long run, a heat pump using geothermal energy is better than an air-to-water heat pump . Making the right choice is usually a rewarding experience, but sometimes it can be challenging.
Aside: There are people behind the former "Iron Curtain" who can now choose from 25 kinds of butter, who long for that one pack in the store. But that's not what we're talking about here.
Choosing can also be less enjoyable and sometimes difficult. Moreover, it's (unfortunately) true that those who can invest the most (have the money) at the start of a new construction project ultimately end up being the cheapest.
*Tip: → Buying a heat pump? Always compare before you buy. Fill out the form and receive quotes from specialists. Compare and save up to 30%! Request quotes! Example! 6 kW home.
Let's consider a simple house that requires a 6 kW heat pump. (120 m² floor area / no heat recovery calculated by creating a transmission) We can opt for a brine/heat pump:
Purchase of 6 kW combination heat pump (with built-in cooling and tap water) €8,000. Purchase of vertical source (incl. drilling) €3,500. Together €11,500.
With correct transmission, the heat pump will run for approximately 2000 hours per year for heating. Domestic hot water consumption: 400 hours per year. Cooling: 400 hours per year.
Energy costs per year: 6 kW: 4.5 (annual COP / SPF) = 1.33 kW from the grid 1.33 kW x 2000 hours = 2666 kWh per year heating 6 kW: 3.1 (tap water COP) = 1.93 kW 1.93 kW x 400 hours = 772 kWh per year tap water Cooling: (2 pumps of 70 Watt each) 140 Watt x 400 hours = 56 kWh per year cooling Total 2666 kWh + 772 kWh + 56 kWh = 3494 kWh per year x € 0.20 = € 699,-
These costs + purchase over 15 years: € 11,500 (purchase) + (15 years x € 699 energy costs) = € 21,985.
If we choose an air/water heat pump:
Purchase of an air/water heat pump (split unit) of 6 kW: (outdoor unit €2823,- + indoor unit €3524,-) = €6347,-
6 kW : 3.2 (COP year / SPF) = 1.87 kWh from the grid 1.87 kW x 2000 hours = 3740 kWh for heating 6 kW : 2.7 = 2.22 kW x 400 hours = 888 kWh for tap water (With the ground/water heat pump we cooled passively with the source 400 hours x 5.13 kW source power, delivered cooling capacity is then 2052 kWh) With an air-water heat pump we have to do this actively (after all, the outside air is warmer when we want to cool) 2052 kWh : 3 (COP) from the grid: 684 kWh cooling per year Total kWh = 3740 + 888 + 684 = 5312 kWh x € 0.20 = € 1062.40 per year energy costs
These costs over 15 years: €6,347 (purchase) + (15 years x €1,062.40) = 22,283 euros
New choice air/water + PV panels:
We'll use the same purchase price for the brine/water heat pump, but we'll choose the air-to-water heat pump. Available for equipment purchase: €11,500. The air-to-water heat pump costs €6,347, leaving us with €5,153. We'll also add a PV array of 16 panels, totaling 3,840 watts peak, for €4,695. The expected yield from these PV panels (facing south in the Netherlands is certain): Factor 0.85 x 3,840 (installed HP capacity) = 3,264 kWh per year. The air-to-water heat pump consumption remains unchanged at 5,312 kWh per year. We generate 3,264 kWh of this ourselves per year, so our annual consumption becomes: (5,312 - 3,264) = 2,048 kWh per year. 2,048 kW x €0.20 = 409.60 per year.
Total costs over 15 years €6,347 (wp) + €4,695 (PV) + (15 years x 409.60) = €17,186.
Brine/water heat pump + PV We needed 3494 kWh per year for the heat pump We therefore generate 3264 kWh per year, so we only consume 230 kWh per year. (x 0.20 = € 46) Purchase: € 11,500 (wp) + € 4695 (PV) + (15 years x € 46) = 16,885 euros.
Summary: In this comparison, we've examined which device or combination sometimes works out better. How do you best invest your available funds in new construction? Note: This comparison is purely an example; the labor costs and installation costs are not included. For convenience, we assume these are not significantly different. All the mentioned systems require a virtually identical low-temperature distribution system. The result in this example: Investment €11,500, brine/water heat pump yields
