Which heating system to choose when replacing the heater after 36 years?

  • Erstellt am 2016-07-14 20:26:29

kiswiss

2016-07-18 12:26:55
  • #1
You were right, I checked, 55,000 kWh for 3 years. According to the energy certificate
 

86bibo

2016-07-18 12:42:18
  • #2
then 1000l per year should be sufficient and I would simply have the heating system replaced first and then see over the next 1-2 years. As mentioned, solar thermal energy is more a matter of belief. Currently, you can rarely really save with it, unless you have a very high hot water demand. Heating support usually does not bring a huge benefit (although I would take it), because most of the energy is generated in summer when very little heating power is needed. Hot water in summer is usually free (+water costs).

Would photovoltaic possibly be an alternative to solar thermal? It doesn't help save on heating costs, but it helps save on electricity costs and is generally more financially worthwhile. Ecologically, that is another matter.
 

ErikErdgas

2016-07-19 09:35:10
  • #3
Hello kiswiss,

since the energy certificate is consumption-based, caution is naturally advised when interpreting it, to avoid incorrect conclusions due to the potentially large influence of user behavior.

A gas heating system with a liquefied gas tank can be an attractive alternative. The specific price varies significantly regionally. However, the advantage is the use of conventional system technology, as is well established in gas condensing technology.

Replacing the radiators does not necessarily make sense upfront. It would be more reasonable to have a heating load calculation done, which will determine the heating load your building and the individual rooms require and also how large the heating surfaces need to be at certain system temperatures. After that, one could see where further adjustments are necessary.

Best regards, Erik from moderne.heizung
 

Bari

2016-08-13 00:01:55
  • #4
I'll join in here.

We have been living since March '16 in our own semi-detached house from 1972.
Heated area (ground floor/upper floor/attic) approx. 135 sqm.
Fully basemented (not heated).
Triple-glazed windows with 0.8* insulation value have recently been installed.
Roof was insulated and re-roofed in '09.
An 8KW wood stove is located in the living area (ground floor) - living room/dining room/kitchen are one room!
Front door with at least the same insulation value as the windows will be replaced soon.

Heating/hot water, apart from the wood stove (heating only) on the ground floor, is provided by the oil boiler located in the basement with the 6000-liter tanks.
The oil boiler is still the original, so over 40 years old... But it still works, just anything but efficient.
So something else has to come, I think it will stay oil since the semi-detached house is not insulated from the outside.

In mid-January this year I had 2000 liters of standard heating oil delivered as the tank indicator showed almost empty or close to empty.
As of 12.08.16, according to the tank indicator, there are still 40 cm left in the 6000-liter tank (4 x 1500 L tanks, welded and visually intact).
I don’t know our consumption yet, but I think the 2000 liters will be almost used up in the first year. (2 adults and 2 children (3 years, 3 weeks)).

What would you advise me regarding heating?

For your information, we live in BW!

Best regards
 

Bari

2016-08-13 00:40:36
  • #5
...Edit: Fuel gauge display goes up to max. 200cm.
Calculation correct?
40cm / 200cm x 6000 liters tank volume = 1200 liters remaining heating oil amount in the tank!
So approx. +- 800 liters consumed from date of refueling until now!
 

kiswiss

2016-10-20 20:02:45
  • #6
Good evening everyone,

I would now like to report what has been done and ask you another question regarding the heating.

An oil boiler has been installed because a sibling heating oil tank of 6300 liters was available and a gas connection was not present anyway.

The house does have full thermal insulation.

What I would like to know now is, what do you think about fully desalinated water in the circuit? My heating engineer says it is better for the boiler and the radiators. What bothers me a little is that every time water needs to be refilled, I have to get it.

Does it really make that much difference, fully desalinated or normal water?

And he recommended a water softening system.

What would you say to that?

Thanks in advance
 

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