Slanted wooden louvres offer natural light and cross-ventilation in the prefabricated house in Costa Rica, which architecture studio A-01 created as a prototype for a series of future zero-carbon homes.
No Footprint House was prefabricated in the Central Valley of Costa Rica before being transported to its site in Ojochal, a small village located in the Puntarenas province.
With the climate of its tropical setting and the aim to emit as little carbon as possible both in mind, the house is designed to have its climate passively controlled, meaning it does not rely heavily on artificial heating or cooling.
Slanted walls provide solar shading and are covered in slender slats that act like large blinds, opening or closing to allow cross ventilation. The outer screens are motorised so that they can fold up completely.
“The slanted skin decreases the direct impact of sunlight and precipitation, which protects the elevated floorplan from overheating and splashing water,” A-01 said.
“Facade panels can be opened or closed individually in order to regulate views and exposure, augment or reduce air flows, create privacy and security.”
No Footprint House is linked to the local electricity and water networks, which A-01 said are almost completely powered by renewable energy, while solar panels are used to heat the water on-site in order to save energy.
A-01 placed all the services, like machinery, bathrooms, kitchen and laundry area, in a volume in the centre of the floor plan to create a single link point.
“This keeps the service lines short and contributes to our overall savings in terms of embedded energy and material usage,” it added.
The house was also transported to site on a single truck, saving construction workers from travelling from Central Valley to the building site regularly.
“Our prefabrication logistics in that central valley requires only a short time of the workers on-site and thus implies maximized efficiency with the material and worker transportation,” A-01 said.
The house’s prefab structure is composed of an elevated steel grid measuring 12 by nine metres raised on concrete foundations, and columns that form a second layer inside the inclined exterior walls.
Inside, an open-plan living area including a living and dining area, two bathrooms, two bedrooms and a terrace is arranged around the central service core.
Additional features, like storage, and the bed frames are designed to slot in between structural columns.
Also known as NFH-108, the house forms part of A-01’s mission to develop carbon-neutral construction in Costa Rica. It previously worked with Dutch architecture firm OMA to create a carbon-neutral roadmap in 2010, that was later modified and then ratified by the national government in 2018.
NFH-108 is the first iteration of No Footprint House, a project that it intends to create a prefab house with a zero-carbon footprint. According to the A-01, this version has 40 per cent less carbon emissions than a typical Costa Rican house of the same size.
NFH-108是No Footprint House的第一版，該項目旨在創建一個零碳足蹟的預製房屋。 根據A-01的說法，此版本的碳排放量比典型的相同大小的哥斯達黎加房屋減少40％。
The second iteration is already underway and A-01 said it will achieve a 60 per cent reduction, with changes such as swapping the steel for a locally sourced laminated teak wood that the studio’s engineers developed with a Swiss-Costa Rican company.
According to A-01, additional reductions will be made through changes to the prefabrication chain and certain material selections that will save another 20 per cent of emissions.
This is in line with the Life Cycle Assessment (LCA), which assesses the environmental impacts of a project throughout its life cycle, that it A-01 presented at the international climate conferences by the United Nations (the Pre-COP25 in Costa Rica and the COP25 in Madrid) last year.
In the final No Footprint House, the remaining 20 per cent of emissions will be offset by the production of local energy.
The intention is that once finalised this design will be used for three different pre-designed housing structures – including a “tiny” 36-square-metre version, a mid-size 81-square-metre version, and family home measuring 108 square metres.
Other versions can also be customised in since based on the established grid size and materials from a catalogue – a feature A-01 said is the first of its kind in Central America.
目的是最終確定該設計將用於三種不同的預先設計的房屋結構–包括“微型” 36平方米版本，中型81平方米版本和108平方米的家庭住宅 。
No Footprint House is longlisted in the rural house category of Dezeen Awards 2020.
The project is among a number aiming to reduce the carbon footprint of houses, as architects address the climate crisis and environmental impact of the building industry by designing carbon-neutral buildings and carbon-negative buildings.
Examples include Parc Hadau, a net-zero-carbon housing scheme that Loyn & Co has proposed for Wales; and a home in Victoria, Australia that absorbs more carbon than it emits, designed by Clare Cousins Architects.
Photography is by Fernando Alda.
例如，Parc Hadau，Loyn＆Co為威爾士提出的零碳淨住房計劃； 由克萊爾·考辛斯建築師事務所（Clare Cousins Architects）設計的澳大利亞維多利亞州的房屋吸收的碳比排放的碳更多。