Energy calculation/
U-value calculation
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We help you with the energy calculation
When applying for a building permit and technical consultation with the municipality, it is usually necessary to have an energy calculation for your future house. This should be in accordance with the current building regulations from Boverket , also known as BBR. The energy calculation can be somewhat complicated to perform on your own. That is why we at Konstruktionshjälpen are at your service. Read on for all the information you might need about energy calculations and contact us to get started with your building permit application today.
What is an energy calculation?
If you plan to build a new building, or build an extension, in most cases you need to supplement your building permit application with an energy calculation. The energy calculation is also called an energy balance calculation. This is a theoretical simulation of the expected energy consumption of the completed building over an average year. No later than two years after the building is put into use, the energy consumption must be confirmed via an energy declaration. An energy calculation may be needed for an ordinary villa as well as a holiday home or extension.
Read also: When is a building permit needed?
What is the difference between an energy calculation and an energy declaration?
The energy calculation is carried out when planning a new building in order to prove through calculations that it is expected to meet the current requirements for new construction. In addition, a calculation is performed for the finished building if the energy requirements are to be verified through this method.
The calculation needs to follow the Housing Authority's regulations and general advice to determine the building's energy use during normal use in a normal year, BEN. This step is not required if the calculation is only used to show that the building is expected to meet the energy requirements and verification is by measurement.
An energy declaration, on the other hand, is based on actual meter readings collected over a 12-month period (in any of the last three years). If there are no measurement values available during this period, an energy declaration can be drawn up with calculated values.
What is U-value and how is it calculated?
The U-value measures the heat losses through a building part. Striving for low U-values is important to ensure an energy-efficient and sustainable house for the future.
A U-value calculation ensures that the thermal insulation is sufficient, which contributes to high resident comfort and minimal energy consumption during the building's use. It is not as complex as a full energy balance calculation but requires information about the insulation in the climate shell and the windows.
Information needed to perform the U-value calculation includes:
Building permit drawings
The thickness of the insulation in the floor, walls and ceiling
Location and geographical position of the house
Uw values for windows and doors, including frame and sash, representing the entire structure
What is the difference between U-value calculation and energy calculation?
The U-value calculation is usually carried out during the planning and construction process to ensure that the building meets the national energy requirements and energy efficiency standards.
On the other hand, a complete energy calculation is required when you want to assess the total energy use of a building. This includes not only the insulation but also other factors such as heating, cooling, ventilation and lighting. Energy calculations are used to evaluate the overall energy performance of the building and to ensure that it meets national and international energy requirements and sustainability standards. Some projects only require U-value calculation and not energy calculation.
Read also: What is U-value and how is it calculated?
When is an energy balance calculation required?
I bygglovsprocessen behöver flera steg och regler tas i beräkning. En av de viktigaste stegen är att följa Boverkets Byggregler (BBR), som är bindande för alla typer av byggnationer i Sverige. Ett av Boverkets byggregler är att en energibalansberäkning måste genomföras. En verifierad energiberäkning visar att byggnaden klarar energikraven. Kravet om energiberäkning gäller såväl nybyggnation som ombyggnation samt tillbyggnad.
You may need to perform an energy calculation if:
You plan to apply for a building permit.
You are considering additional insulation.
You are considering carrying out a conversion or extension.
You need to dimension your heating system.
You want to get an idea of your house's consumption.
What should an energy calculation contain?
Kommunen förväntar sig vanligtvis att huset uppfyller Boverkets Byggregler (BBR) gällande:
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Specifik energianvändning
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Effektbehov inklusive värmepump
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U-medelvärde
How does an energy calculation work?
An energy calculation for houses takes into account all the factors that affect the total energy consumption. These factors include various aspects such as insulation, the thermal inertia of the building, ventilation as well as energy consumption from lighting, household appliances and personal heating. The energy calculation is based on a method based on SS-EN ISO 13790.
Who does energy calculations?
If you need to carry out an energy calculation for a villa or any other type of building before a building permit, you should seek help from a qualified expert. We at Konstruktionshjälpen can assist you with this. The calculation is always performed by a certified energy expert.
Vad kostar en energiberäkning & U-värdesberäkning?
Depending on the information and documents provided, the price for energy calculation varies from SEK 500 and up.
We usually include U-value calculation in the planning, should this be needed we usually offer this.
Read also: How much does a building permit cost?
We need that to be able to perform energy calculations
In order to carry out energy calculations, certain information about the property is required. We would need the following information from you:
Heating - which system is used for heating the property? For example, exhaust air heat pump, air-water heat pump, geothermal heat pump, wood burning or oil boiler.
Ventilation – type of ventilation system, for example self-draft or mechanical fan system.
Description of walls, floor and ceiling – material (wood, concrete, brick) and construction.
U-values for windows and doors – u-value is a measure of energy performance where lower values indicate better insulation properties.
This information helps us to perform an accurate and correct energy calculation for your property.
Vi hjälper dig med energiberäkningen – och bygglovet
Konstruktionhjälpen are experts in everything to do with building permits. We help you with your application and ensure that all important documents are submitted - including energy calculation or U-value calculation. In this way, we can guarantee you a problem-free and smooth building permit process . We deliver your energy calculation within four working days.
For us, it is important that you share as much information as possible about your project. Help us help you with your building permit! Contact Konstruktionhjälpen for more information about your energy calculation - and the building permit in its entirety.
