ᐅ NIBE Air-to-Water Heat Pump Options for the Indoor Unit

Two-person household (no children)
170 m² (1830 ft²)
~5.5 kW heating demand
No ERV (except guest room)

I received a quote for a Nibe air-to-water heat pump F2050/6.

There are two options for the indoor unit:

Option 1:
1 unit Nibe heat pump system with F2050/6
1 unit NIBE outdoor air heat pump F2050-6
1 unit NIBE control unit SMO S40
1 unit NIBE heat meter set EMK 300 for SMO 40
1 unit NIBE ELK 9 heating cassette 9 kW
1 unit NIBE charging pump CPD 11-25/65
1 m (3.3 ft) NIBE condensate pipe KVR 11-10, power 15W
1 unit NIBE connection set for F2040 ground floor DN25
1 unit NIBE VST 11 domestic hot water control Fighter
1 unit NIBE domestic hot water storage tank DD-WH 30301F, 295 liters (78 gallons)
1 unit NIBE buffer storage tank UKV100 wall-mounted, 4 connections 1" 100 liters (26 gallons)
1 unit NIBE heating circuit group DN 25 HKG25C without mixer

Option 2:
Alternatively
Nibe heat pump system with 2050/6 with VVM S320
1 unit NIBE air-to-water heat pump package 2379 F2050-6 + VVM S320
1 m (3.3 ft) NIBE condensate pipe KVR 11-10, power 15W
1 unit NIBE connection set for F2040 ground floor DN25

Basically, Option 1 is assembled from multiple components, while Option 2 is the complete indoor unit VVM S320.
The price is almost identical (Option 1 is about €500 net more expensive plus possibly more installation hours).
Which option would you choose?
Does having a pre-assembled indoor unit offer advantages because it is precisely matched to the heat pump?

LostWolf schrieb:

Does having a complete indoor unit offer the advantage that it is exactly matched to the heat pump?

No, actually the opposite. You can connect the complete indoor unit to about half a dozen Nibe heat pumps. So it’s a standard solution that works everywhere.

For me, the question is whether you are planning to have children or what your domestic hot water demand is. The custom configuration, for example, offers 65% more hot water volume, which is a big advantage if you have high hot water needs (a large bathtub or a family with children).
You could also remove the unnecessary buffer tank in the custom setup.

I would personally prefer the individual components. It’s often easier to repair in case of a defect.

I meant that this indoor unit is matched to the Nibe heat pump.

No children planned/possible
Showers mostly every two days
Bathtub used very rarely (if so, planned bathing, meaning a manual increase in temperature beforehand is possible)
A boiler in the kitchen (due to pipe length)
No circulation system

LostWolf schrieb:

I meant that this indoor unit is matched to the Nibe heat pump.

That’s true, but in the end it doesn’t really matter technically, since a heat pump is just a heat pump – it’s not rocket science. It doesn’t require extensive matching; the outdoor unit (regardless of manufacturer) is designed so simply that there are no significant differences. With a car, you might say the turbocharger is like the outdoor unit, and the rest of the car is like the indoor unit.

LostWolf schrieb:

No children planned/possible
Showers mostly every two days
Very rare bathtub use (if used, planned for bathing, meaning manually setting a higher temperature beforehand)
In the kitchen, a boiler (due to pipe length)
No circulation

In that case, a smaller storage tank (as in offer 1) is sufficient. However, if things change later, offer 2 will leave you completely inflexible.