ᐅ Integrated unit Stiebel Eltron LWZ 504 with central supply air system
Created on: 19 Oct 2014 20:20
D
DJCOON
Hello dear forum members,
Through a variety of professional magazines I ordered for our new build in spring 2015, I came across the air-to-water heat pump LWZ 504 from Stibel Eltron. According to Stibel, this unit offers the following:
"The compact LWZ 504 provides all the comfort expected from an energy-efficient house. The system draws energy for pleasant indoor temperatures and hot water from the outside air. Modern ventilation management ensures that the heat stays inside the building. It recovers up to 90% of the heat from the exhaust air. This allows a comfortable, healthy atmosphere to be combined with high efficiency. The demand-controlled inverter technology also ensures high efficiency. It produces exactly the amount of heat currently needed. High performance values can be achieved even at low temperatures. Energy-saving operation is supported by the modern high-efficiency heating circulation pump and excellent insulation of the hot water storage tank. For those who want to be even more independent from rising energy costs, the LWZ 504 can be operated with self-generated photovoltaic electricity using the appropriate accessories (ISG + SEE). The large, intuitive matrix display ensures that the modern technology in the award-winning design is easy to operate."
Key Features
I understand that this great system naturally comes at a price, but I would like to ask the experts among you—air-to-water heat pump owners as well as heating engineers—for advice or experience with such units. Ideally, it would be great if someone already has this exact pump installed in their basement :-)
Thank you in advance for your responses.
Best regards,
Martin
Through a variety of professional magazines I ordered for our new build in spring 2015, I came across the air-to-water heat pump LWZ 504 from Stibel Eltron. According to Stibel, this unit offers the following:
"The compact LWZ 504 provides all the comfort expected from an energy-efficient house. The system draws energy for pleasant indoor temperatures and hot water from the outside air. Modern ventilation management ensures that the heat stays inside the building. It recovers up to 90% of the heat from the exhaust air. This allows a comfortable, healthy atmosphere to be combined with high efficiency. The demand-controlled inverter technology also ensures high efficiency. It produces exactly the amount of heat currently needed. High performance values can be achieved even at low temperatures. Energy-saving operation is supported by the modern high-efficiency heating circulation pump and excellent insulation of the hot water storage tank. For those who want to be even more independent from rising energy costs, the LWZ 504 can be operated with self-generated photovoltaic electricity using the appropriate accessories (ISG + SEE). The large, intuitive matrix display ensures that the modern technology in the award-winning design is easy to operate."
Key Features
- Excellent suitability for new buildings
- Energy-saving inverter technology
- Ventilation with up to 90% heat recovery
- High domestic hot water comfort with well-insulated 235-liter (62 gallon) storage tank
- Compatible with solar systems
- Stable, sound-optimized housing construction
- Built-in high-efficiency heating circulation pump
I understand that this great system naturally comes at a price, but I would like to ask the experts among you—air-to-water heat pump owners as well as heating engineers—for advice or experience with such units. Ideally, it would be great if someone already has this exact pump installed in their basement :-)
Thank you in advance for your responses.
Best regards,
Martin
We have the predecessor model:
Positive:
- Very good customer service
- Allows informed laypersons to optimize/adjust the system for their own operation
- Users can perform their own "maintenance" – the device is designed with customer-friendliness in mind
- So far, always enough hot water and more than sufficient heating (it does what it is supposed to do)
Average electricity consumption of about 3500 kWh per year (based on 2 years so far)
Negative:
- In our model, the evaporator is somewhat noisy. The sound can be heard in the bedrooms through the ventilation ducts (if it is completely quiet there).
Positive:
- Very good customer service
- Allows informed laypersons to optimize/adjust the system for their own operation
- Users can perform their own "maintenance" – the device is designed with customer-friendliness in mind
- So far, always enough hot water and more than sufficient heating (it does what it is supposed to do)
Average electricity consumption of about 3500 kWh per year (based on 2 years so far)
Negative:
- In our model, the evaporator is somewhat noisy. The sound can be heard in the bedrooms through the ventilation ducts (if it is completely quiet there).
Hello Wastl,
thank you for your post.
With these units, as the name suggests, everything is integrated, right? That means heating, hot water preparation, and ventilation with heat recovery, correct?
We will use the unit for 180 m² (1,940 sq ft) of living space. May I ask for how much living space you are using the unit?
Best regards and thanks
thank you for your post.
With these units, as the name suggests, everything is integrated, right? That means heating, hot water preparation, and ventilation with heat recovery, correct?
We will use the unit for 180 m² (1,940 sq ft) of living space. May I ask for how much living space you are using the unit?
Best regards and thanks
At the end of October, I had an appointment with a heat pump specialist from Stibel and my heating installer to discuss information about the unit, calculations, and ultimately to receive a complete quote. I’m happy to share the details.
@ nat.k. If we take two, we will probably get a discount.
Best regards
@ nat.k. If we take two, we will probably get a discount.
Best regards
DJCOON schrieb:
These units are designed, as the name suggests, to have everything integrated, right? Heating, hot water generation, and ventilation with heat recovery all in one system?
We plan to use the unit for 180 m² (1937 sq ft) of living space. May I ask how much living space you are using the unit for? We have 140 m² (1507 sq ft) of living space across 3 floors. The unit itself comes with different heating elements / power levels.
Everything is integrated: yes. But thanks to the design, it’s very easy to access the individual modules. For example, to service the heat exchanger, you just need to remove 5 screws and then you can take out the cartridge.
Overall, I can say only positive things about the unit, except for the somewhat loud noises. We should have considered that during the planning of the ventilation ducts.
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