Integral device Stibel Eltron LWZ 504 with central supply air

  • Erstellt am 2014-10-19 20:20:41

DJCOON

2014-10-19 20:20:41
  • #1
Hello dear forum,
through a variety of ordered trade magazines for our new building in spring 2015, I have now come across the air-to-water heat pump LWZ 504 from Stibel Eltron. This unit offers the following according to Stibel:

" The compact LWZ 504 provides all the living comfort worthy of an energy-saving house. The energy for pleasant room temperatures and warm water is drawn from the outside air. Modern ventilation management ensures that the heat stays inside the house. It recovers up to 90% of the heat from the exhaust air. This way, a pleasant, healthy atmosphere and high efficiency can be excellently combined. The power-regulating inverter technology also ensures high efficiency. It produces exactly the amount of heat currently needed. Even at low temperatures, high performance values can be achieved. The modern high-efficiency heating circulation pump and excellent insulation of the hot water storage tank ensure economical energy use. Those who want to free themselves even more from rising energy prices can operate the LWZ 504 with self-generated photovoltaic power using the right accessories (ISG + SEE). The large, intuitively operated matrix display ensures that the modern technology in the award-winning design is easy to use."

The most important features

    [*]Excellent suitability for new buildings
    [*]Energy-saving inverter technology
    [*]Ventilation with up to 90% heat recovery
    [*]High hot water comfort through well-insulated 235-liter storage tank
    [*]Can be combined with solar system
    [*]Stable, sound-optimized housing construction
    [*]Built-in high-efficiency heating circulation pump

I am aware that this good piece naturally also has its price, but I ask the experts among you, air-to-water heat pump owners as well as heating installers, for help or experience with such units. Ideally, of course, if someone already has exactly this pump installed in their basement :-)

Thank you in advance for your answers.

Regards Martin
 

Wastl

2014-10-20 07:50:58
  • #2
We have the predecessor: Positive: - Very good customer service - Possibility for targeted laypersons to optimize / adapt the system for their own operation - You can perform "maintenance" yourself -> the device is built to be user-friendly - So far, always sufficient hot water and more than enough heat (it does what it is supposed to do) average about 3500 kWh of electricity per year (based on only 2 years so far,...) Negative: - In our model, the evaporator is somewhat noisy. The noise can be heard in the bedrooms through the ventilation ducts (when it is absolutely quiet there).
 

DJCOON

2014-10-20 10:13:09
  • #3
Hello Wastl,

thank you very much for your contribution.

With these devices, as the name suggests, everything is integrated?! That is, heating, hot water preparation, and ventilation with heat recovery?!

We will use the unit for 180 m² of living space. May I ask for how much living space you use the device?!

Regards and thanks
 

DJCOON

2014-10-20 10:59:34
  • #4
At the end of October, I had an appointment with a "heat pump specialist" from Stibel and my heating engineer regarding information about the device, calculation, and finally the full submission of an offer. I am happy to provide information about it. @ nat.k. If we take two, we will definitely get a discount

Regards
 

Wastl

2014-10-20 11:25:37
  • #5

We have 140 sqm of living space on 3 floors. The device itself is available with different heating rods / performance levels.
Everything integrated: yes. But thanks to the design, you can easily access the different modules. That means, for example, to service the heat exchanger, you have to loosen 5 screws and you can already pull out the cassette.
Actually, I can only report positive things about the device, except for the somewhat loud noises. We should have taken that into account when planning the ventilation shafts.
 

DJCOON

2014-10-20 11:45:09
  • #6
@ Wastl, is it allowed to ask approximately how much the complete installation back then cost?!
 

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