Good morning,
After a long search, we have found a house. It has a gas heating system installed (1997) that is only used for heating. For hot water, a tankless water heater is installed.
Of course, the energy certificate is not very impressive. The house was fully renovated in 2013 and has about 145m² (1560 sq ft) of living space.
Suggestions on the energy certificate:
I have already consulted two heating companies here. They are not convinced about solar solutions. Their suggestion was just to install a storage tank (60 L (16 gallons)) and that’s it.
Do you have any other suggestions or ideas for hot water preparation?
Thanks in advance
Best regards
Steven
After a long search, we have found a house. It has a gas heating system installed (1997) that is only used for heating. For hot water, a tankless water heater is installed.
Of course, the energy certificate is not very impressive. The house was fully renovated in 2013 and has about 145m² (1560 sq ft) of living space.
Suggestions on the energy certificate:
- new gas heating system with a condensing boiler
- for hot water: solar combined with gas heating system with a condensing boiler
I have already consulted two heating companies here. They are not convinced about solar solutions. Their suggestion was just to install a storage tank (60 L (16 gallons)) and that’s it.
Do you have any other suggestions or ideas for hot water preparation?
Thanks in advance
Best regards
Steven
N
Nissandriver7 Oct 2019 15:50So,
the house dates back to 1937 and was renovated internally in 2013. The roof and ceiling were insulated. According to the current owner, only the load-bearing walls remained. These are 40 or 45 cm (16 or 18 inches) thick.
The heating system works without any problems, has been serviced every year, and received a new burner last year. What concerns me a bit is the tankless water heater in the basement. It is a 24 kW (32 hp) unit.
The gas heating system is used for heating only!
I have already considered the domestic water pump, and it would be more energy-efficient than the water heater! Or am I mistaken?
Where can I find a professional who can run the calculations?
Thanks in advance for your answers!
the house dates back to 1937 and was renovated internally in 2013. The roof and ceiling were insulated. According to the current owner, only the load-bearing walls remained. These are 40 or 45 cm (16 or 18 inches) thick.
The heating system works without any problems, has been serviced every year, and received a new burner last year. What concerns me a bit is the tankless water heater in the basement. It is a 24 kW (32 hp) unit.
The gas heating system is used for heating only!
I have already considered the domestic water pump, and it would be more energy-efficient than the water heater! Or am I mistaken?
Where can I find a professional who can run the calculations?
Thanks in advance for your answers!
N
nordanney7 Oct 2019 16:07Nissandriver schrieb:
What concerns me a bit is the tankless water heater in the basement. It’s a 24kW tankless water heater.Why? Because of the relatively long pipe run to the point of use?N
Nissandriver7 Oct 2019 16:35nordanney schrieb:
Why? Because of the relatively long cable run to the appliance?For example. And that electricity costs will increase. Or am I mistaken?!?Nissandriver schrieb:
For example, and that the electricity costs will increase. Or am I mistaken?!?In our previous rented apartment, we had a new tankless water heater. The electricity costs were quite reasonable. However, it was installed directly in the bathroom, which was adjacent to the kitchen, so the wiring was very short.N
Nissandriver7 Oct 2019 16:50Not sure how old it is, but at least built in 2013. So, from the basement to the bathroom or kitchen, it’s at least 15m (50 feet).
B
boxandroof7 Oct 2019 16:57Nissandriver schrieb:
I have already considered the domestic water pump, and it would be more energy-efficient than the heater! Or am I mistaken?Yes, that's correct. About three times less. And unlike instantaneous water heaters, it is suitable for photovoltaic power due to the low power consumption. On the other hand, installation and purchase costs are higher.Similar topics