ᐅ Single-family house – 18,000 kWh in two years – what could be the issue?
Created on: 17 Aug 2020 16:38
T
titoz
Hello everyone,
I need to reach out to the forum because I would like to get your opinions and advice.
We (2 adults with 2 small children) have been living for two years in a single-family house with a self-contained apartment (Einliegerwohnung). This apartment has been rented out for one year (2 adults with a baby).
Our house is equipped with a ground source heat pump (Nibe 1245 PC). It provides hot water, heating, and passive cooling through the underfloor system.
The main electricity meter shows 18,000 kWh.
This seems extremely high to me, and I cannot figure out where such consumption could come from.
Could the meter from the energy supplier be faulty?
Could a device, for example the heat pump, refrigerator, stove, etc., be malfunctioning and therefore drawing more electricity?
I am still quite puzzled.
Best regards
I need to reach out to the forum because I would like to get your opinions and advice.
We (2 adults with 2 small children) have been living for two years in a single-family house with a self-contained apartment (Einliegerwohnung). This apartment has been rented out for one year (2 adults with a baby).
Our house is equipped with a ground source heat pump (Nibe 1245 PC). It provides hot water, heating, and passive cooling through the underfloor system.
The main electricity meter shows 18,000 kWh.
This seems extremely high to me, and I cannot figure out where such consumption could come from.
Could the meter from the energy supplier be faulty?
Could a device, for example the heat pump, refrigerator, stove, etc., be malfunctioning and therefore drawing more electricity?
I am still quite puzzled.
Best regards
K
knalltüte17 Aug 2020 17:11So, the Nibe PC can do passive cooling, which gives you 2-3 degrees Celsius (4-5 degrees Fahrenheit).
Which model is it, the 6, 8, 10, or 12?
Is cooling via electricity disabled? If I’m not mistaken, that’s also possible. Heating element definitely deactivated?
I find those numbers quite shocking! That would be about €250 (approximately $270) per month per household for electricity, heating, and hot water. Electricity around €70 (approximately $75), heating €30-40 (approximately $32-43). €140 (approximately $150) just for hot water?? Constant showers, daily bathtub use, condenser or exhaust dryer running in addition to the washing machine every day? (Baby)
For me, that would be too much in a modern house (2 years old or bought used?).
Which model is it, the 6, 8, 10, or 12?
Is cooling via electricity disabled? If I’m not mistaken, that’s also possible. Heating element definitely deactivated?
I find those numbers quite shocking! That would be about €250 (approximately $270) per month per household for electricity, heating, and hot water. Electricity around €70 (approximately $75), heating €30-40 (approximately $32-43). €140 (approximately $150) just for hot water?? Constant showers, daily bathtub use, condenser or exhaust dryer running in addition to the washing machine every day? (Baby)
For me, that would be too much in a modern house (2 years old or bought used?).
tomtom79 schrieb:
What does it mean for a device to be defective? Is everything connected to one meter?
So 9000 kWh per year for 2 families with heating? That sounds normal.
We use 4500 kWh household electricity for 5 people, one of whom lives in the granny flat.
But that means 2 refrigerators, or rather 2 kitchens, and with babies and children more laundry, plus a heating lamp over the changing table.
How many square meters are heated including the basement and ancillary rooms? Yes, I actually need to consider the meter issue separately, because a lot was planned incorrectly.
You can get an initial idea in the post just above this one.
Of course, we have 3 refrigerators with freezers in the entire building, one chest freezer, 4 PCs, but only LEDs that use very little power.
We have about 210 m² (2260 sq ft) of living space including the granny flat. No basement or garage.
@superzapp erzapp How do you come up with those numbers?
19,000 in 2 years, 9,500 kWh per 2 residential units, that’s 4,500 kWh including heating per household. Without knowing the exact square meters, that seems reasonable.
@titoz
Regarding your issue, you first need to separate the two apartments, which an electrician will do. They will then apply for the second meter.
For the heat pump, you need a heat meter at the transfer point to the secondary apartment to measure the heat energy for billing heating and hot water.
19,000 in 2 years, 9,500 kWh per 2 residential units, that’s 4,500 kWh including heating per household. Without knowing the exact square meters, that seems reasonable.
@titoz
Regarding your issue, you first need to separate the two apartments, which an electrician will do. They will then apply for the second meter.
For the heat pump, you need a heat meter at the transfer point to the secondary apartment to measure the heat energy for billing heating and hot water.
K
knalltüte17 Aug 2020 17:59tomtom79 schrieb:
@superzapp erzapp How do you arrive at those numbers?
19000 in 2 years 9500 kWh / 2 residential units, that’s 4500 kWh including heating per household. Without knowing the exact square meters, that seems reasonable.
@titoz
Regarding your problem, you first need to separate the two apartments; an electrician will do this and apply for the second meter.
For the heat pump, you’ll need a heat meter at the connection point to the granny flat to bill for heating and hot water.Clear calculation error on my part – sorry.
So, after about 2500 kWh (consumer electricity), there are only around 2000 kWh left for the heat pump for heating and hot water per apartment per year. That should be okay, right?
With heat pumps, people often forget that there’s no longer a bill for oil or gas afterwards.
superzapp schrieb:
So, the Nibe PC can do passive cooling, which brings about a 2-3 Kelvin (3.6-5.4°F) difference.
Which model is it exactly, the 6, 8, 10, or 12?
Is active cooling via electricity disabled? If I’m not mistaken, that should be possible. Is the electric heating element definitely turned off?
I find those numbers quite high! That would mean around €250 per month per household for electricity, heating, and hot water. Electricity €70, heating €30-40. €140 for hot water?? Continuous showers, a bathtub every day, a condenser or vented dryer running daily in addition to the washing machine? (Baby)
For me, that would be too much in a modern house (2 years old or bought used?). It’s an F1245-10 PC.
So far, I haven’t found any setting that allows active cooling via electricity.
The electric heating element is disabled.
I’ll write down the basic settings and data shortly.
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