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
Hello everyone,
we are planning to build a house and have already designed it. We want to use renewable energy for heating and are now considering whether to choose a LWZ 304 or a LWZ 504 from Stiebel Eltron. Based on the house size of 160 sqm (1,722 sq ft), KfW standard around 60, and the heating load calculation, we initially thought the LWZ 304 would be sufficient. However, after reading that the inverter technology of the 504 is much better, we are wondering if it is worth investing a bit more to go for that model. We also plan to install photovoltaic panels on the roof and use a Tesla battery storage system.
I would appreciate hearing any experiences regarding operation, noise levels, costs, customer service, and so on. It has been interesting to read about this here, and I would like to get more information.
Best regards,
Daniela
we are planning to build a house and have already designed it. We want to use renewable energy for heating and are now considering whether to choose a LWZ 304 or a LWZ 504 from Stiebel Eltron. Based on the house size of 160 sqm (1,722 sq ft), KfW standard around 60, and the heating load calculation, we initially thought the LWZ 304 would be sufficient. However, after reading that the inverter technology of the 504 is much better, we are wondering if it is worth investing a bit more to go for that model. We also plan to install photovoltaic panels on the roof and use a Tesla battery storage system.
I would appreciate hearing any experiences regarding operation, noise levels, costs, customer service, and so on. It has been interesting to read about this here, and I would like to get more information.
Best regards,
Daniela
Hello Daniela,
we completely moved away from the system. The reasons were that such a system is quite sensitive, and ultimately we did not want ventilation. You keep reading about it, and the trend seems to be declining.
We have now installed Viessmann, a heat pump with the option to add a system on the roof later.
Regards
we completely moved away from the system. The reasons were that such a system is quite sensitive, and ultimately we did not want ventilation. You keep reading about it, and the trend seems to be declining.
We have now installed Viessmann, a heat pump with the option to add a system on the roof later.
Regards
Hello,
our new build is finally finished (160 sqm (1,722 sq ft), KFW 55) and we are very happy with our LWZ 504. There is always hot water, and it is very quiet. The ventilation system will be put into operation soon, but we haven’t done that yet because there has still been dusty work going on inside the house, and we didn’t want dust to get into the ventilation system. I’m curious how loud it will be. I hope it will be very quiet since I am quite sensitive to noise. I will report back later.
However, I cannot recommend living in such a well-insulated house without ventilation. We are currently in this situation, and it is very warm simply because the house is so well insulated. We both work full-time and are rarely home to ventilate properly. We have many floor-to-ceiling windows, so the house warms up quickly when the sun shines. The LWZ 504 is currently only running to provide hot water. Even when it was colder recently (around 8°C (46°F)), it barely ran because the house is so well insulated and warm enough. That is why we’re looking forward to the ventilation system. It is said that the entire air in the house will be exchanged in about an hour. Thanks to the pollen filter, I hope it will relieve my allergy symptoms.
Soon we will also have the photovoltaic system installed on the roof, along with the Tesla battery storage. There is a subsidy available for this, which we plan to take advantage of.
Best regards
Daniela
our new build is finally finished (160 sqm (1,722 sq ft), KFW 55) and we are very happy with our LWZ 504. There is always hot water, and it is very quiet. The ventilation system will be put into operation soon, but we haven’t done that yet because there has still been dusty work going on inside the house, and we didn’t want dust to get into the ventilation system. I’m curious how loud it will be. I hope it will be very quiet since I am quite sensitive to noise. I will report back later.
However, I cannot recommend living in such a well-insulated house without ventilation. We are currently in this situation, and it is very warm simply because the house is so well insulated. We both work full-time and are rarely home to ventilate properly. We have many floor-to-ceiling windows, so the house warms up quickly when the sun shines. The LWZ 504 is currently only running to provide hot water. Even when it was colder recently (around 8°C (46°F)), it barely ran because the house is so well insulated and warm enough. That is why we’re looking forward to the ventilation system. It is said that the entire air in the house will be exchanged in about an hour. Thanks to the pollen filter, I hope it will relieve my allergy symptoms.
Soon we will also have the photovoltaic system installed on the roof, along with the Tesla battery storage. There is a subsidy available for this, which we plan to take advantage of.
Best regards
Daniela
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