ᐅ Bungalow120 explanations, experiences?

Hi,
I’m new here.
Here is my introduction post in the forum:

https://www.hausbau-forum.de/threads/bungalow120_vorstellung_fragen.10803/

My questions:

HEATING

1. Underfloor Heating: controllable in each room?
Question:
YES / NO (please explain with reasons, advantages, and disadvantages)?

2. Planned Air-to-Water Heat Pump: Dimplex Splydro LAW 9IMR
Question:
Are there any experiences in the forum with this unit? AND/OR which comparable devices would you recommend?

2.1. Maximum Flow Temperature: 55°C (131°F)
Question:
From what I have read so far, 55°C is a relatively high flow temperature, meaning a lot of power is required/consumed.
How should I understand the flow temperature in this context?

2.2. Switchable Pipe Heater (2/4/6 kW) for Heating Support
Question:
I understand a pipe heater for heating support, but what does "switchable" mean here?
Does it mean you manually switch to electric operation “if it doesn’t get warm enough”? Or is this related to domestic hot water?

2.3. Domestic Hot Water Storage Tank 300 L (79 gallons) with 3.2 m² (34.4 sq ft) Coil Heat Exchanger and 1.5 kW Flange Heater for Thermal Disinfection
Question:
Is the domestic hot water storage tank the same as potable water?
If yes, isn’t 300 L quite large?
I know it depends on the number of people, needs, and habits. Therefore:

• 2 adults
• Woman (housewife) average per week: 2 baths, max 3/4 full (bathtub with max 200 liters), 1 shower max 10 minutes
• Me (office job/no dirty work): shower every second day (10-20 minutes each)
• Children: none yet, but planning 1-2

Another question is about the "3.2 m² coil heat exchanger and 1.5 kW flange heater" — what is their purpose?

2.4. Electronically Controlled Pump, 100 L (26 gallons) Buffer Storage Tank, and Bypass Valve to Ensure Required Heating Water Flow Rate
Question:
I assume the 100 L buffer tank is for the heating water.
I read that underfloor heating systems may not need a buffer tank because the screed stores the heat… is that correct?

3. A chimney stove is planned for the living/dining/kitchen area.
Question:
How does the heat pump work with the underfloor heating if I heat for an extended time with the wood stove?
Does the heating turn off for that time because the temperature is reached from the stove?
If yes, is this somehow harmful for the heating system/underfloor heating if it “stands still” for a longer period?

4. Combination unit or separate storage tanks for domestic hot water…
Question:
What are the advantages and disadvantages of having two separate tanks instead of a “combination unit”?
I understand one advantage is saving space in the heating room by using a combination unit. Anything else?

Thanks in advance for your help and answers!
(Sorry for the many questions at once, but these things are unclear to me and probably easy for you to answer.)

Please answer with numbering so that we and other readers can follow easily.

PS: For those who haven’t read my introduction post:
It’s a bungalow without a basement, with a hipped roof at 30°.
Living area is 120 m² (1,292 sq ft) with an external dimension of 12.5 x 11.6 m (41 x 38 ft).
The construction will be solid masonry (36.5 cm/14.4 inches bricks).
If you have further questions, feel free to ask or look up the introduction.

Greetings from Bavaria

Hello,

Bungalow120 schrieb:
It’s best to number your answers so that we and the other readers can follow along 😉

You forgot to add the possible points behind the questions 🙂

...sorry, no offense, but it reads like a school test 😉

Regards

Wastl schrieb:
Regarding point 1: Yes – so you can adjust the temperature individually,... Especially when the children’s room is still empty at first.
Regarding point 2: The heating system needs to match your needs and your house. Giving a general answer here would be like looking into a crystal ball. You have already considered the required demand. Now, if you provide details about your planned house, we could carry out a heating load calculation,... of course free of charge. If you want to make a truly cost-effective decision, go to a professional and have the sizing and type of heating system calculated to fit your needs and your house.
Regarding point 3: Why should it be harmful? You don’t heat during the summer either, right? If your stove heats your home sufficiently (including the bathroom), you can turn off the heating completely. That doesn’t cause any harm.

Greetings from Munich to Bavaria 😉

THANK YOU!
Regarding point 1. OK. I’m just asking because I once read that you don’t need to adjust anything there, only at the heating unit itself. And if the heating is properly set, then the temperature in the house will be fine anyway... (that was just a rough summary in my own words). But I’m also in favor of having controls in the rooms. Thanks again for confirming that.
Regarding point 2. Information about the planned house can be found in the first post (link). Or should I post it again?
Or what other details would be needed?
This heating system (see above) was already offered by a heating company. That’s why I’m asking about experiences.
Regarding point 3. ...embarrassing... sorry... it’s obvious, of course 🙂 THANK YOU!
(Sometimes you just get tunnel vision when you’re dealing with too many things.)

E.Curb schrieb:
Hello,

You forgot to include the possible points after the questions 🙂

........sorry, no offense, but it reads like a test paper 😉

Best regards

Hi,
...by the way, you get 0 points... no suitable answer.
Just kidding...
yes, you’re right.... 🙂
I just tried to simplify it somehow... since sometimes even I can’t match the answers when reading the forum...