BWK Green Architecture Firm is an international Sustainability Architecture design team, whose partners are from Asia, Europe and India. We hope to make original high energy consumption of buildings to achieve nearly zero energy planning through many sustainable concepts and expertise. So, this makes building design more refined, perfect, and achieve a high degree of energy saving and user comfort.

BWK Green Architecture Co. Ltd. is the first company in Taiwan to provide the full service of Passive House design. We are authorized by the Passive House Institute (PHI) to held the Passive House Designer Training Course, exam and PHPP agent contract in Asia.


Passive House 5 design Principles    

  • Thermal Insulation
  • Certified Passive House Windows
  • MVHR
  • High Airtightness Achieved
  • Thermal Bridge Free

BWK Green Architecture Firm provides clients comfortable, healthy and energy saving living environment with several mixed architecture energy saving skills.  For users who live at subtropical climate, they won't no longer endure the poor internal living climate where often encounters temperature fluctuation in Summer and Winter. Moreover, long term stable relative humidity and fresh air also provide high quality living and working space.



Glazing facade building


建築能耗分析               太陽輻射熱模擬           熱橋計算

Old building retrofit

老舊的門窗不具氣密性、室內長期潮濕與結露所產生的黑黴菌滋生及老舊建築的自然採光問題 (可取得德國認證)


Care centre

提供家中長者室內溫度恆溫的健康舒適的居住環境。     (可取得德國認證)

室內懸浮粒子監測         體感舒適度分析

Single House

提供經濟、省能及健康的單元型住宅空間。        (可取得德國認證)

國際被動房設計           室內空氣品質監測       室內溫溼度監測           氣密測試

Farm House

提供客製化快速組裝,可移動節能舒適的農舍。  (可取得德國認證)        


Multi-residential Building



Payback Period

There are hundred thousand buildings adopting Passive House design in Europe. And hundred of them are monitored for long time to make sure their expected perfrmance. In terms of econmical affordability, although 10~20% incremental cost needs to be considered, 70~90% HVAC energy saving at post occupancy period can lead to 5 to 8 year cost pay back period. Compared to other building energy saving standards, passive house is proven as the most practical technology to achieve benefits.

BWK Green Architecture Company uses the world's leading simulation technology, which includes IES-VE, DAYSIM, WUFI, PHPP, designPH and other thermal bridge software, to accurately calculate building’s air conditioning energy consumption and primary energy at post occupancy stage. It assists to improve planning of building’s energy efficiency at the design phase. Besides, BWK also offers a wide range of architectural physical modeling. 

  • Natural light and artificial light simulation   
  • Building ventilation analysis
  • User thermal comfort analysis
  • Building energy simulation
  • CFD analysis
  • Building thermal bridge analysis


Natural lighting and artificial lighting simulation

BWK provide a series simulation of natural lighting and shading. According to site's location and its surrounding buildings, we provide the field's lighting research so as to fit what planers need. In addition, based on architect's consideration toward lighting performance, visual comfort or lighting energy saving, BWK also provides professional lighting simulation, feedback and potential solutions. The final results can be applied for BREEAM, LEED and any other Green Building standards which have specific visual comfort requirement.  Those analised data are not only precise but also easily to be read.





Building ventilation analysis

"Natural ventilation introduction" should be considered as a highly potential solution for replacement of HVAC. When it is properly applied for architecture design, it can afford good quality air in various building types and in different climate conditions. Generally, in subtropical climate like Taiwan, the introduction of NV could replace air conditioning at some period of time. So, BWK strongly recommand that NV planning should be started at earlier design stage rather than at the late planning period. Based on many case studies, the increase of building HVAC energy use is mainly due to that buildings are wrongly planned such as glazing facade oriented, poor shading strategies......and so on. BWK provides a series of NV simulation for designers to optimise architecture design. 


User thermal comfort analysis

In terms of thermal comfort, the state of mind has a strong relationship with the temperature of the surrounding environment. PPD(Predicted Percentage Dissatisfied) is a criteria that quantifies the user's dissatisfaction with the temperature of the space. It can be related with PMV(Predicted mean vote). BWK uses PMV and PPD to express how users feel about the indooe space, too cold or overheating? Besides, to achieve thermal comfort there are more indicators need to be considered such as how to avoid drought, vertical temp. difference,......and so on.  



Building energy simulation

BWK uses internationally acclaimed computer simulation software, IES-VE and PHPP to calculate building energy use. Before simulation, the building's initial information input should be input such as architecture component, thermal envelope, surround environment and internal settingcondition. Through dynamic simulation, the HVAC energy, primary energy and CO2 emission could be calculated so the future clients, architects, and designer can know the energy use at post occupancy. And those data can be used to apply for BREEAM and LEED as well.



CFD analysis

Computational Fluid Dynamics (CFD) 涉及流體流動和傳熱過程的數值模擬,CFD套用於建築的目標是為了提供一個工具給設計者,使他們能夠獲得內部和周圍那些給指定的邊界條件的建築空間中的資訊,了解可能發生的空氣流動和傳熱過程,其中可能包括氣候變化的影響、建築內部的熱平衡、以及和HVAC系統的關係。沃科團隊使用建築流體力學軟體除提供設計者建築外部風的變化的分析,來取代傳統高成本的風動實驗,也提供建築內部不論是風速溫度或是二氧化碳的變化。



Building thermal bridge analysis

Thermal Bridge-Free Construction is crucial especially when we talk about low energy use building and nearly zero carbon building. When we said a building is a passive house, it is expected to achieve thermal bridge free architecture details. BWK use Flixo to simulate linear thermal bridge then the data would be exported to PHPP to calculate all building's energy use.




Living in the subtropical climate, in addition to avoid the cold air in winter and over heating in summer, how can you recommend the best of the economic solution for internal stable relative humidity is a major focus. No matter where you are in the office or at home, you can feel that the stable RH indeed bring the comfort to you. In addition, it also avoid that the damp brings the threat of black mold and then causes respiratory diseases.





No matter for a new built building or refurbishment of exsiting one, there should be a basic requirement of air exchange rate. This principle is to make sure the interior CO2 below 1000ppm. The air quality is supposed to be related with the users' comfort and their working productivity. BWK uses mixed-mode ventilation strategy to support clients' projects. In some situation like summer night, NV could be introduced to flush up still air. In other situation, mechanical ventilation with heat recovery would be activated to replace window ventilation.  



When MVHR system is mainly installed for whole building ventilation, fresh air is supposed to deliever to living area like living room and bedroom. That is for hygiene issue air will be extracted from kitchen, toilet or even storage room whose air is with wet and unpleasant smell. The air automatically and gentlely flow through supply and extraction area with positive pressure and negative pressure. By this way, it is confirmed that the air of the whole building is continuely replaced by fresh and filtered air.


MVHR is crucial for Passive house design. And it makes sure the internal space air always fresh. In terms of its structure, the different streams of air are separated by profiled metal or PVC plates. With the use of ducts (fin-counter-flow heat exchanger) it is possible to further increase the relevant heat exchanging area.


Global PH TRAINING & Promotion !!

Planners and designers can acquire the necessary substantiated expertise in further training courses and seminars. A large range of courses are available now. Another form of advanced education is through practical implementation. An architect who has already planned and built a certified Passive House indisputably possesses the necessary know-how. The certificate shows the building owner that the designer or consultant has acquired the knowledge and experience relevant for planning or consultancy services for Passive House projects.

PHPP & DesignPH Software

The PHPP is an easy to use planning tool for energy efficiency for the use of architects and planning experts. The reliability of the calculation results and ease of use of this planning tool has already been experienced by several thousand users. In addition, project data of a building model created in designPH can be exported to IP-PHPP, just as in the metric versions of PHPP. Users of the IP-version of PHPP can also enter their projects in 3D with the SketchUP-plugin designPH, before refining the data in the Passive House Planning Package.

Passive House Component

The Passive House requires high quality components: super-insulating window frames, highly efficient ventilation units, airtightness materials, thermal insulation...and so on. Certified Passive House suitable products allow users to verify and compare the relevant parameters of the respective products.


Good Insulation keeps heat outside in summer and traps heat in winter

Certified Window

Low U-value window frame reduce energy balance


MVHR can avoid outdoor air pollution and supply clean air

Airtight Materials

High building airtightness can reduce air leakage and infiltration


Want to know more about our company?
You are welcome to contact us We will provide you with more complete information to answer and serve you.