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lockwitzer10 Mar 2011 08:38Hello,
we had a Weishaupt condensing boiler installed, which is operated with liquefied petroleum gas (LPG). After 4 months of use, the technician noticed that the switch (using an adjustment screw that only limits the flow?) from natural gas to LPG was not done.
Question: Could this cause damage to the system?
How does this situation affect gas consumption?
In the 4 months, we used about 2300 liters (610 gallons) of gas! For a 150 m² (1615 ft²) house built according to the 2009 energy saving regulations, with underfloor heating, this seemed quite excessive to me...
I appreciate any answers.
we had a Weishaupt condensing boiler installed, which is operated with liquefied petroleum gas (LPG). After 4 months of use, the technician noticed that the switch (using an adjustment screw that only limits the flow?) from natural gas to LPG was not done.
Question: Could this cause damage to the system?
How does this situation affect gas consumption?
In the 4 months, we used about 2300 liters (610 gallons) of gas! For a 150 m² (1615 ft²) house built according to the 2009 energy saving regulations, with underfloor heating, this seemed quite excessive to me...
I appreciate any answers.
Hmm, natural gas is also a type of liquefied gas, isn’t it?!?
And if you have a liquefied gas system, you generally also have a liquefied gas tank, but in that case, you shouldn’t have a connection to the local gas network.
Am I misunderstanding something here?
2300L (610 gallons) is quite a lot, but consumption shortly after moving in and again during winter is always higher.
And if you have a liquefied gas system, you generally also have a liquefied gas tank, but in that case, you shouldn’t have a connection to the local gas network.
Am I misunderstanding something here?
2300L (610 gallons) is quite a lot, but consumption shortly after moving in and again during winter is always higher.
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lockwitzer10 Mar 2011 09:46Sorry—so, we don’t have natural gas connected... and we installed a propane tank underground... The conversion is done at the boiler—if it is done at all. Certainly, with new builds, etc., higher consumption can be expected... but we used timber frame construction on the upper floor, so there was little moisture introduced into the process...
I don’t have much expertise in this area, but what exactly is being modified in the system? Natural gas is also a type of liquefied gas, so what significant changes are expected? And if there is a faulty (combustion) adjustment, you should consider holding the heating engineer accountable.
But why are such tanks still being installed nowadays? Are there actually still many suppliers for them? Isn’t the entire system likely much more expensive over time compared to installing a heat pump?
But why are such tanks still being installed nowadays? Are there actually still many suppliers for them? Isn’t the entire system likely much more expensive over time compared to installing a heat pump?
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lockwitzer10 Mar 2011 10:48Well, we also considered the heat pump option, but ultimately decided on the above-mentioned boiler combined with a 12.5 m² (135 ft²) solar panel system due to the lower initial costs. I hope this won’t turn out to be a complete mistake.
The boiler is supposed to be converted from natural gas to liquid propane gas, since propane operates at a significantly higher pressure and also has a better energy content, right? I’m thinking that the higher pressure and better energy content might actually lead to increased consumption if the conversion isn’t done.
Maybe an expert in this field will still provide an explanation that clarifies this topic better.
The boiler is supposed to be converted from natural gas to liquid propane gas, since propane operates at a significantly higher pressure and also has a better energy content, right? I’m thinking that the higher pressure and better energy content might actually lead to increased consumption if the conversion isn’t done.
Maybe an expert in this field will still provide an explanation that clarifies this topic better.
What you said about the pressure and the injection makes sense and could actually be the reason.
I did some research for myself and was surprised—if the figures are correct, even an oil heating system would be cheaper with the current high oil prices, not to mention that liquid gas tanks are usually expensive to rent and tied to a specific supplier.
But you should definitely talk to your heating engineer, because 2,300 liters (610 gallons) of propane correspond to about 1,500 liters (400 gallons) of heating oil, which should roughly be your annual consumption without solar support.
Did you have a heat load calculation done before construction? There must have been data provided beforehand, right?
I also find a 25 kW system to be oversized for 150 m² (1,615 sq ft). Maybe the system is operating inefficiently?
We are currently planning a single-family home with 130 m² (1,399 sq ft) and underfloor heating, and the maximum heating demand is estimated at 8–9 kW when built to simple standards.
I did some research for myself and was surprised—if the figures are correct, even an oil heating system would be cheaper with the current high oil prices, not to mention that liquid gas tanks are usually expensive to rent and tied to a specific supplier.
But you should definitely talk to your heating engineer, because 2,300 liters (610 gallons) of propane correspond to about 1,500 liters (400 gallons) of heating oil, which should roughly be your annual consumption without solar support.
Did you have a heat load calculation done before construction? There must have been data provided beforehand, right?
I also find a 25 kW system to be oversized for 150 m² (1,615 sq ft). Maybe the system is operating inefficiently?
We are currently planning a single-family home with 130 m² (1,399 sq ft) and underfloor heating, and the maximum heating demand is estimated at 8–9 kW when built to simple standards.
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