Trusted Architects in Braintree

The form factor is total external area of the thermal envelope divided by the use-able (treated) floor area. The lower the value, the better the performance of the building. Ideally the form factor needs to below 3 to achieve the standard.

Yes, the high quality construction, design, and workmanship as well as the greater amounts of insulation and the better performing components will lead to increased costs. But this will be partly offset by the decreased cost of installing a full heating system. As time passes and more Passivhaus buildings are built, economies of scale and familiarity come into play and then also there is the reduced energy costs, improved quality of the internal environment and energy security.

Yes, many commercial buildings have been built to the Passivhaus standard, especially schools. The better internal atmosphere and air quality leads to a more productive working and learning environment. Also because commercial buildings tend to be larger than houses, the form factor is often lower and therefore easier to achieve the standard.

All buildings, new builds, extensions, and renovations both residential and commercial are required to have a certain level of thermal performance. Glazing is typically the weakest element of any building in terms of thermal performance and therefore to comply with the Building Regulations we will be limited with the amount of glass we can use in a design. However, there are several different things we can do to maximize the amount of glazing in the design, such as upgrading other elements of the building, creating renewable energy or improving the efficiency of existing heating systems.

Once you have the quotations in they should be scrutinized and checked that all you have asked for is included and make sure that each Builder or Contractor is quoting for the same end result. It is also important to make sure you feel comfortable with the builder or contractor and communication goes well between you. Then you decide. We are always available to assist with this if you wish.