What Are SAP Calculations and Why Do You Need Them?

What Are SAP Calculations and Why Do You Need Them?

SAP Calculations can be used to calculate building energy performance. Calculating DMEV values allows users to specify fan power for specific building conditions. It reduces the chance of over-specifying. It’s also more economical to calculate Psi values instead of defining the power of the fan from the building’s specifications.


SAP can assist you in avoiding problems that could arise during construction. This is best carried out at an early point to identify any design flaws and allow you more time to correct them. If it is done at a later date, it may prove to be more stressful and time-consuming, and in some cases it may not be possible.


Building control typically requires SAP calculations for extensions, especially in cases where the new extensions comprise more than 25% of the current floor area. There are a number of ways to show Part L compliance with these calculations.


SAP provides a variety of options for implementing currency conversions in the business process. It uses an exchange type called M. sap calculation allows different exchange rates to be maintained for every type of document. For each pair of currencies, a translation ratio is mandated. The currency of reference is USD. By default, the currency rate for USD is used for all other pairs.

Renewable technologies

There are many options for incorporating renewable technologies into SAP calculations. One of the most cost-effective methods is to incorporate them into the fabric of a building. This could include full insulation as well as sealing all walls making use of energy-efficient heating controls. It is also possible to use energy-efficient lights and appliances.

Air permeability

Air permeability measurements are an important part of the SAP calculation process. These values will determine the energy performance of the building. If the residence has air leakage or air leakage, the SAP rating will be lower. The majority of SAP assessors set air permeability targets of 5-10 m3/h2/m2. The targets can be reduced if there are high levels of emissions. Airtightness values of 4-5 meters per hour are considered healthy for a natural-ventilated dwelling.

Conformity to Building Regulations

The first step in ensuring compliance with Building Regulations is to understand the requirements. SAP calculations can be used to determine whether an building is compliant with these requirements. This includes analyzing the structure and thermal efficiency of the various rooms. High-performance windows and heating controls are a good option to help ensure compliance with SAP calculations.

Cost of making an SAP calculation

A SAP calculation can help property developers avoid costly conversion projects and ensure that the new buildings are energy-efficient. As per building regulations, the calculation is mandatory. It assists in determining the Energy Performance Certificate for a property. A Energy Performance Certificate is essential for selling real estate, and obtaining it right is essential for the success of a new construction.

Author: Patrick Robinson