There is a LEED system, it is American. There is BREEAM, which is English. Initially, the BREEAM system was invented, somewhere in the 90th year, and then the idea was taken by the Americans and made the LEED system. The first LEED building appeared in 1998 – only 8 years after the creation of the BREEAM system. Technically, these two systems are similar to 70-80%, we made a deep comparison by technical criteria. They are constantly improving and taking the best world practices in the design, construction and operation of buildings. But the approach to certification of buildings is very different.
In the LEED system, the project team (usually with the help of a LEED consultant) is engaged in the design and construction of the building. The team itself can register the project, take into account the requirements of LEED standards, prepare documentation. It forms a package of project documentation and sends it through the Internet to the United States, where the examination is conducted in different sections. This procedure is similar to our Russian: the group of experts on energy efficiency, air, water, infrastructure check this documentation and then give their comments in the form of advice or ask to clarify and supplement the information and award the criterion “is not fulfilled” or “information is required” “. When the object is built, the same examination of the construction documentation takes place, which results in a certificate with a certain level.
The nuance of the LEED system is that there are very strict mandatory requirements that are necessary for execution – otherwise the building will not be considered green. If the building is not energy efficient, or the internal quality of the air does not meet the standard, there is insufficient ventilation, or if the building can be smoked. Also, in the event that mass contamination was allowed during the construction process, the building will not be considered green. All engineering systems of the building should work correctly and correctly, being checked by an independent acceptance expert. The building should also save water.
In addition to mandatory criteria, there are many additional points for which points are given: bicycle parking, green roof, car charging station, natural lighting. Here already the project team has a lot of space for creativity.
BREEAM has a different approach, and if there are similarities with the technical criteria with LEED, the processes vary considerably. In BREEAM there is the concept of an “appraiser”, and when a project is developed (usually by involving a BREEAM consultant), it is checked by an appraiser – one person, not a group of experts. The evaluator acts very formally: he is provided with documents for checking compliance with the established criteria, and if everything is in order, he approves them. Appraiser appears twice – at the design stage and at the stage of putting the object into operation. Based on the results of the compliance check, he prepares a report, which is then sent to the UK for a selective audit. The evaluation results in a certificate. It is important to note that in the BREEAM system the certificate is issued twice (for the project itself and at its completion), the LEED certificate is issued once after the object is completed.
BREEAM as a system is more flexible. There are mandatory requirements, but they are much simpler than LEED. At the same time, the higher the level of certification, the greater the requirements. For example, at a minimum level, one of the mandatory conditions: that fluorescent lamps are high-frequency and do not flicker. This is very simple, because all modern equipment does not flicker. In general, the system is more flexible, it is possible not to make the building highly energy efficient, but it can be made more favorable in terms of air quality, or improvement or green materials. Performing alternative criteria, you can still get a certificate, though with a restriction on the level of certification.