ᐅ New Heat Pump for an Older Home Without Renovation

For those considering installing a heat pump in an older building.

In spring 2023, Panasonic will launch a high-temperature heat pump that can still deliver a flow temperature of 75°C (167°F) at an outdoor temperature of -10°C (14°F). A maximum SCOP of 5.2 is stated. This presents an alternative to oil and gas heating systems without the need to switch immediately to underfloor heating and/or additional insulation.

More detailed information about the Aquarea L is not yet available and will be provided later.

SaniererNRW123 schrieb:

There is a high-temperature heat pump on the market that can still provide a flow temperature of 75°C (167°F) even at an outside temperature of -10°C (14°F). A maximum SCOP of 5.2 is claimed.

That’s certainly not stated all in one sentence. A SCOP of 5.2 with a flow temperature of 75°C (167°F) is not possible. You can ask Carnot, who says that with a source temperature of 0°C (32°F) and a sink temperature of 75°C (167°F), the maximum achievable COP is 4.64.
High-temperature heat pumps are not new, but that doesn’t change the fact that with a realistic SCOP of 2.0 at a peak flow temperature of 75°C (167°F), there’s no prize to win or money to be made.

dertill schrieb:

It definitely won’t be stated in one sentence. A SCOP of 5.2 with a flow temperature of 75°C (167°F) is not feasible.

No, it won’t. I’m not claiming that either.

But let’s consider a high flow temperature (it doesn’t have to be as high as 75°C (167°F)) and an average winter SCOP of around 3.0. That would already be something. I’m really curious to see the actual data.
The Panasonic Aquarea units have always been very efficient.

SaniererNRW123 schrieb:

No, it won’t. I’m not doing that either.

But let’s keep it at a high flow temperature (it doesn’t have to be as high as 75°C (167°F)) and maybe an average of around 3.0 during a normal winter. That would already be something. I’m really curious about the actual data.
The Panasonic Aquarea units have always been very efficient.

At 3, I would install one without any hesitation and no questions asked...
According to the phrase "Shut up and take my Money!"

The new generation of heat pumps using the R290 refrigerant is already well suited for older buildings. However, it is important to check in advance whether the heating element assists the system or not. This information varies from manufacturer to manufacturer. In principle, I recommend trying out which supply temperatures are actually necessary. Experience shows that these can mostly be lowered by around 10°C (18°F).

Is it possible to lower the temperatures on oil heating systems that much (to test during one winter how feasible a switch to a heat pump would be), or would that cause any damage?