ᐅ Heat Pump Capacity and Buffer Tank Size(s) for New Single-Family Home
Created on: 25 Sep 2023 20:45
D
Dachshund90
Hello everyone,
We would like to order the components for our heating system soon.
The following information is the basis:
- New detached house built according to legal standards
- Heated living area: 193 m² (2077 sq ft) (floor plans attached)
- Planned heat pump: ground source heat pump Bosch CS 7800iLW 8 F 8 kW
- Planned buffer tank: Stora WH 370 LP1B
- Drilling depth to be determined according to the system
- Designed for a household of 4 people
Questions: Do you consider the 8 kW ground source heat pump sufficient? Is the 350 L (92 gallons) buffer tank adequate? Is a second buffer tank for the heating water necessary?
Thank you very much and best regards
We would like to order the components for our heating system soon.
The following information is the basis:
- New detached house built according to legal standards
- Heated living area: 193 m² (2077 sq ft) (floor plans attached)
- Planned heat pump: ground source heat pump Bosch CS 7800iLW 8 F 8 kW
- Planned buffer tank: Stora WH 370 LP1B
- Drilling depth to be determined according to the system
- Designed for a household of 4 people
Questions: Do you consider the 8 kW ground source heat pump sufficient? Is the 350 L (92 gallons) buffer tank adequate? Is a second buffer tank for the heating water necessary?
Thank you very much and best regards
D
Dachshund9026 Sep 2023 11:03guckuck2 schrieb:
You won’t really achieve huge temperature differences in a new build anyway. A hydraulic balancing is done, meaning through the flow rate and controls on the heat pump, the rooms are set once to the desired temperature level and then maintained at that setting. MH okay, I do imagine having different temperatures. Especially in a children’s room not yet in use or basement rooms that are heated but not used all the time.
RotorMotor schrieb:
What is your approach?
All I see are floor plans, not room-by-room heating load calculations. ;-) I’m not a heating engineer. I just wanted to show with the floor plans what I want to heat. These were given to the heating engineer, who then selected the storage tank mentioned above and the heat pump referenced earlier.
K
KarstenausNRW26 Sep 2023 11:52Dachshund90 schrieb:
MH ok, so I do imagine different temperatures. Especially in a kids' room that’s not yet in use or basement rooms that are heated but not always occupied.What are you imagining exactly? 2-3 degrees Celsius (4-5°F) difference (realistic) or maybe 7-8 degrees Celsius (13-14°F) (never ever)?In a thermos flask, you don’t have cold beer at the bottom and hot tea on top. The whole interior is equally warm because it’s very well insulated from the outside. The temperatures have to even out. Physically, it can’t be any other way. It would be different in an older building without or with poor insulation.
D
Dachshund9026 Sep 2023 12:52KarstenausNRW schrieb:
What do you have in mind? 2–3 degrees Celsius (4–5 °F) (realistic) or maybe 7–8 degrees Celsius (45–46 °F) (never ever)?
In a vacuum flask, you don’t have cold beer at the bottom and hot tea above it. Everything is equally warm because it is very well insulated from the outside. The temperatures simply have to equalize. It’s physically impossible otherwise. In an older building that is uninsulated or poorly insulated, of course, it would be different.I would have said 3–5 degrees Celsius (37–41 °F). If more than 3 degrees Celsius (37 °F) is not practical or reasonable, then 3 degrees Celsius (37 °F) it is.A slight difference is of course possible, but not directly next to each other with a 5K difference. Also, every (closely) laid heating circuit is invaluable for delivering heat to the rooms with the lowest possible supply temperature (cost-efficient). Ultimately, the heated rooms warm up the unheated ones nearby.
Basement is "cold" only in existing buildings, not in new construction. Moisture needs to be removed, especially in the first few years. Please keep heating continuously!
Basement is "cold" only in existing buildings, not in new construction. Moisture needs to be removed, especially in the first few years. Please keep heating continuously!
D
Dachshund9026 Sep 2023 13:04guckuck2 schrieb:
A small difference is of course possible, but not a 5K (9°F) difference right next to each other. Also, every (closely) laid heating circuit is worth its weight in gold to bring heat into the rooms with the lowest possible supply temperature (= cost-efficient). Ultimately, the heated rooms warm up the unheated ones anyway.
Basements are “cold,” not in new builds. Moisture must be removed, especially during the first few years. Please keep heating on continuously! Hello guckuck,
the heating installer is planning for heating circuits to be laid as close as possible, so we have that covered. A truly cold basement is not planned. This only concerns rooms that can be a few degrees cooler.
Best regards
W
WilderSueden26 Sep 2023 13:07So our bedroom is definitely about 3 degrees Celsius (5°F) cooler than the rest, which works fine. What doesn’t work is the outdated approach of not heating unused rooms.
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