ᐅ Sizing of Residential Utility Connections for Electricity, Gas, and Water
Created on: 28 Dec 2018 12:34
M
M4rvin
Hi everyone!
I wanted to apply for the house utility connection from the provider, but I ran into some challenges.
How many kW of electricity do I need (34/43/55)? And for the construction power supply (34/43/5569)?
How many kW of gas do I need (40/80/120), or rather the “total simultaneous power/process power required for the final setup”?
And what are the values for water regarding the total flow rate VR / peak flow rate VS?
The property is just under 600 m² (6,458 sq ft), with a living area of about 120 m² (1,292 sq ft) without a basement, and a gas boiler with hot water.
I wanted to apply for the house utility connection from the provider, but I ran into some challenges.
How many kW of electricity do I need (34/43/55)? And for the construction power supply (34/43/5569)?
How many kW of gas do I need (40/80/120), or rather the “total simultaneous power/process power required for the final setup”?
And what are the values for water regarding the total flow rate VR / peak flow rate VS?
The property is just under 600 m² (6,458 sq ft), with a living area of about 120 m² (1,292 sq ft) without a basement, and a gas boiler with hot water.
The electrical connection is regulated by the technical connection conditions (TAB) of the utility provider and your application to the grid operator. Depending on the devices and demand, you will be protected with the appropriate maximum fuse. For example, there are increased requirements with heat pumps, and an electric vehicle charging station must also be applied for. A Powerwall like that can cause a whole street to lose power.
The water supply will have a Qn=2.5 rating, which is a standard water connection with the regular basic fee. Unless you have a 20m (65.6 ft) pool and filters that need to be flushed three times a week with several cubic meters of water...
Gas?! No idea.
The water supply will have a Qn=2.5 rating, which is a standard water connection with the regular basic fee. Unless you have a 20m (65.6 ft) pool and filters that need to be flushed three times a week with several cubic meters of water...
Gas?! No idea.
For water and gas, I would stick to the minimum standard (you only have 120 m² (1,292 sq ft) of living space).
For electricity, consider upgrading to a 63A main fuse (80A) if the additional cost is minimal. This is especially relevant if you plan to use an electric vehicle. Wallboxes can work with a standard 50A connection, but if you have two, your supply won’t get overloaded. However, this depends on the extra cost charged by the utility provider. Usually, there is also a construction cost surcharge included, which can quickly amount to four digits. Just ask for clarification.
For electricity, consider upgrading to a 63A main fuse (80A) if the additional cost is minimal. This is especially relevant if you plan to use an electric vehicle. Wallboxes can work with a standard 50A connection, but if you have two, your supply won’t get overloaded. However, this depends on the extra cost charged by the utility provider. Usually, there is also a construction cost surcharge included, which can quickly amount to four digits. Just ask for clarification.
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benediktr16 Feb 2019 23:49And what about the total flow rate VR / peak flow rate VS of the water?
The peak flow rate VS is calculated from the total flow rate VR. According to DIN 1988, VR is divided into so-called usage units (NE). A usage unit can be, for example, a kitchen, bathroom, or utility room. Using these units in a formula, VS is determined.
This is important in residential construction or larger building projects. For a building project the size of a single-family house, a PE-X pipe with an outer diameter of 32 mm (1.25 inches) is sufficient.
The peak flow rate VS is calculated from the total flow rate VR. According to DIN 1988, VR is divided into so-called usage units (NE). A usage unit can be, for example, a kitchen, bathroom, or utility room. Using these units in a formula, VS is determined.
This is important in residential construction or larger building projects. For a building project the size of a single-family house, a PE-X pipe with an outer diameter of 32 mm (1.25 inches) is sufficient.
M4rvin schrieb:
How many kW of gas do I need (40/80/120)?
Or rather "total power/process power required simultaneously at full expansion"You need to first consider which appliances you plan to supply through your gas connection and whether they might operate at the same time.
For example, a modern condensing boiler typically requires about 15 kW of input power.
If you want additional appliances, you need to check their consumption.
- Gas fireplace: 4–10 kW
- Gas stove: approximately 15 kW
- Grill with natural gas connection: 10–40 kW (depending on size and number of burners)
- Gas patio heater: 7–15 kW
Assuming that you don’t grill in the coldest winter (although there might be some unusual people who do), but both the stove and fireplace are gas-powered, you would need a 40 kW connection (15 + 10 + 15).
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