Hello everyone,
I have been living in our newly built single-family house since mid-2021 and installed a Roth ThermoAura 5kW heat pump with an 850-liter (225-gallon) thermal storage tank.
Lately, I have been focusing more on the settings and have made occasional adjustments. However, I suspect there is still room for further optimization. I have already heard that many people consider the thermal storage tank to be less practical since it handles both domestic hot water and heating. By now, I at least agree that the tank is much too large.
I am satisfied with the current indoor temperatures.
What are your thoughts on the thermal storage tank? So far, I have mainly heard negative opinions about it.
Currently, the heat pump cycles about 11 times a day for heating and 1–2 times for hot water.
Here are my current data from this morning (hot water preparation was just running):
I look forward to your feedback.
I have been living in our newly built single-family house since mid-2021 and installed a Roth ThermoAura 5kW heat pump with an 850-liter (225-gallon) thermal storage tank.
Lately, I have been focusing more on the settings and have made occasional adjustments. However, I suspect there is still room for further optimization. I have already heard that many people consider the thermal storage tank to be less practical since it handles both domestic hot water and heating. By now, I at least agree that the tank is much too large.
I am satisfied with the current indoor temperatures.
What are your thoughts on the thermal storage tank? So far, I have mainly heard negative opinions about it.
Currently, the heat pump cycles about 11 times a day for heating and 1–2 times for hot water.
Here are my current data from this morning (hot water preparation was just running):
I look forward to your feedback.
B
Benutzer20011 Nov 2021 10:31Hockey6 schrieb:
I currently have about 12 heating starts per day...
How often does your heat pump cycle at these temperatures? 2 to 3 times maximum. During the day, when the sun comes out, the heating turns off. At night around 0°C (32°F), during the day around 7-9°C (45-48°F).
D
Daniel-Sp12 Nov 2021 00:07Currently at 3-8°C (37-46°F) outside temperature, there are usually 1, rarely 2, heating cycles over 3 hours per day plus one hot water generation cycle.
The Roth Thermo - so-called tank is considered non-optimizable in terms of efficiency in another forum that focuses exclusively on building services. Before attempting any optimization, a modification of the hydraulic system is recommended, aiming to decouple the heating circuit from the thermal tank and have it operated directly by the heat pump, while using the thermal tank only for hot water production.
The Roth Thermo - so-called tank is considered non-optimizable in terms of efficiency in another forum that focuses exclusively on building services. Before attempting any optimization, a modification of the hydraulic system is recommended, aiming to decouple the heating circuit from the thermal tank and have it operated directly by the heat pump, while using the thermal tank only for hot water production.
O
Oetzberger14 Nov 2021 09:04Daniel-Sp schrieb:
It is considered non-optimizable in terms of efficiency in another forum that deals exclusively with building services engineering. Oh my God, you just mentioned the dreaded forum in pig tones with the competent building services specialists here. 😱
The inexperienced admin of this house building forum is known for putting commercial interests above genuinely helping users, so they will probably have your account burning in hell soon. And mine along with it 😉
O
Oetzberger14 Nov 2021 09:08And on the topic: Just search for forum posts about your heat pump type and, unfortunately, you will see that many other builders experience the same issues. Real solutions, as DanielSP has already mentioned, only come from a renovation.
A
Alessandro15 Nov 2021 09:17What are your current electricity consumption levels?
driver55 schrieb:
Flow/return temperatures at design temperature (e.g., -12°C (10°F)), how many heating circuits the building has, the individual rooms, pipe spacing, calculation according to DIN standards, defined room temperatures, flow rates, etc…
Not much can be interpreted from your data extract…Sorry for the delay, but should this be it?
Ground floor:
HC1 Pantry: Pipe spacing 15cm (6 inches), 34.3 m (112.6 ft); 3.3 m² (35.5 ft²), 0.5 l/min, 20°C (68°F)
HC2 Kitchen: Pipe spacing 15cm (6 inches), 85.2 m (279.5 ft); 11 m² (118.4 ft²), 1.1 l/min, 20°C (68°F)
HC3 Dining Room: Pipe spacing 15cm (6 inches), 125.2 m (410.9 ft); 17 m² (183 ft²), 1.6 l/min, 20°C (68°F)
HC4 Living Room: Pipe spacing 15cm (6 inches), 124.1 m (407.1 ft); 18 m² (194 ft²), 1.6 l/min, 20°C (68°F)
HC5 Bathroom: Pipe spacing 10cm (4 inches), 66.9 m (219.5 ft); 6.5 m² (70 ft²), 2.1 l/min, 24°C (75°F)
HC6 Entrance: Pipe spacing 20cm (8 inches), 80.9 m (265.3 ft); 13.8 m² (148.5 ft²), 1.3 l/min, 20°C (68°F)
HC7 Utility Room: Pipe spacing 20cm (8 inches), 59.0 m (193.6 ft); 9.4 m² (101.2 ft²), 1.4 l/min, 20°C (68°F)
First floor:
HC1 Office: Pipe spacing 15cm (6 inches), 110 m (360.9 ft); 14.7 m² (158 ft²), 1.4 l/min, 20°C (68°F)
HC2 Bathroom: Pipe spacing 10cm (4 inches), 102.6 m (336.6 ft); 13 m² (140 ft²), 1.7 l/min, 24°C (75°F)
HC3 Child 1: Pipe spacing 15cm (6 inches), 94.5 m (310.1 ft); 12.4 m² (133.5 ft²), 1.2 l/min, 20°C (68°F)
HC4 Child 2: Pipe spacing 15cm (6 inches), 97.2 m (318.9 ft); 12.8 m² (138 ft²), 1.2 l/min, 20°C (68°F)
HC5 Hallway: Pipe spacing 20 cm (8 inches), 53.4 m (175.2 ft); 8.3 m² (89.3 ft²), 0.8 l/min, 20°C (68°F)
HC6 Master Bedroom: Pipe spacing 15 cm (6 inches), 110.1 m (361.3 ft); 14.7 m² (158 ft²), 1.4 l/min, 20°C (68°F)
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