ᐅ Heat Pump Energy Consumption in 2019 on a Monthly Basis

tomtom79 schrieb:

You don’t mention where you live, so could you say roughly where, if you don’t mind?

What does the cubic meter cost for you? You should factor in these costs since with 20 fills per year, that probably adds up to 200-300€.

Oh, Leipzig.
The fireplace doesn’t seem to have such a big impact after all.
Roughly, it’s on for about 3 hours, producing around 15-20 kWh of heat energy. However, this can’t be fully deducted from the heat pump’s output since it raises the indoor temperature to about 25°C (77°F). Very optimistically, I think you save supply temperature energy of 5-10 kWh, which corresponds to about 1-2 kWh of electricity. With 20 times 1.5 kWh at 26 cents, that amounts to €7.80 savings per year.

Tego12 schrieb:

Just checked: Exactly 2 years in the house, the heat pump used 3250 kWh for both hot water and heating, which means 1625 kWh per year. At our electricity price of $0.27 per kWh, that comes to about €36.5 per month. No special heat pump tariff, because even with a cheaper electricity rate, it would be more expensive due to the additional meter.

These consumption figures also show that it depends on user behavior. Many probably use that much energy just for hot water over the year. So, direct comparisons are difficult, but it does show what is possible.

@tego no kids who bathe every 2-3 days?

With the ever-decreasing energy consumption, even small changes in the surroundings or user behavior naturally have a significant impact on the balance.
180 vs 200 m² (1937 vs 2153 sq ft) is a considerable difference, as are the year of construction, number of occupants, and their hot water demand (bathing, rain shower heads), and so on.
Region, type of heat source, mechanical ventilation with heat recovery, ...

It is really difficult to make meaningful comparisons.

Tego didn’t say anything about the insulation standard, house type, location, etc. Our children bathe almost daily, and my wife showers until the tank is empty... yet it only requires around 600 kWh of electricity for hot water. With 1000 kWh of electricity, you can keep a well-insulated timber frame house warm.

First year with an air-to-water heat pump in northern Germany.
1400 kWh electricity
7100 kWh heat (about 15-20% of that for domestic hot water for 2.5 people, rain shower)

The house has approximately 150 m² (1600 sq ft) without a basement, insulation between KfW 55 and 40 standards, and a central controlled residential ventilation system. 10 m² (110 sq ft) south-facing windows, 18 m² (195 sq ft) west-facing windows, 2 m² (22 sq ft) north-facing windows. No thermostats, no buffer tank. Room temperatures up to 21°C (70°F), including in the bathroom. There, we occasionally use electric heating to warm up.

In the second year, consumption is likely to be slightly higher because I heat more during the day to compensate for longer heating breaks at night due to photovoltaic power.

More important than insulation are heating behavior, settings, and the design of the heating surfaces.