Golden Bay Hideaway

Posts Tagged ‘ecohome’

TV3’s Campbell Live Video

Friday, May 22nd, 2009

John Campbell's Campbell Live

John Campbell's Campbell Live

$41 a year in heating costs? Yes please!

What would it cost to heat a house so that it was warm in every room 24 hours a day, no matter the temperature outside? How about $41 a year total, and that’s just for hot water?

View the video about Little Greenie.

SHAC ‘09 Challenge

Thursday, May 21st, 2009

Tim Bishop, Sustainable Habitat Challenge National Coordinator:

Little Greenie shows what can be accomplished by when using sustainable building principles of Sustainable Habitat Challenge Teams

This house demonstrates the truism that more sustainable building is practical building: simple, durable, and good value.

shac

The Sustainable Habitat Challenge (SHAC 09) is a national collaborative project for teams around New Zealand to design, develop, and build sustainable housing in their local community. Ten tertiary-industry teams have created designs, and seven are currently building or retrofitting their houses.

Sustainable Habitat Challenge Principles

  • Less need for energy, water, and waste production.
  • Adapted for the local environment.
  • Cradle to cradle design.
  • Simple, durable, and good value.
  • Collaborative design and build process that has designers, the trades, and engineers working side by side from the start.
  • Wide dissemination of information learned.
  • Tertiary involvement for education, monitoring, and review.

Read more all about what SHAC 09 teams are doing at www.shac.org.nz

TV3’s Campbell Live Team and University Crew Visit

Monday, May 18th, 2009

Over the weekend we had both TV3’s Natasha Utting and Victoria University’s School of Architecture Professor Michael Donn visit with us and have first hand experience with Little Greenie.

We were interviewed for TV3’s Campbell Live show and expect that will be aired on Thursday 21st May.

Accompanying Professor Donn were three honour students from Victoria University’s Architecture Department to study Little Greenie and accurately measure the house’s insulation values. They took advantage of the computerized data logger system and the nine sensors we embedded in various parts of the structure (ceiling, walls, floor etc).

Professor Donn seemed really excited to find a home built to the best high-tech principals and with the measuring instruments we incorporated.

Lawrence and Antje being interviewed by Natasha Utting

Lawrence and Antje being interviewed by Natasha Utting

Most Energy Efficient House in New Zealand

Friday, May 15th, 2009

eeca

UPDATE: It’s confirmed, Little Greenie is the first HERS 9 star rated home in New Zealand.

Christian Hoerning from the from the Energy Efficiency and Conservation Authority tells it like he sees it:

The house received a Home Energy Rating (HERS) rating to independently verify the standard of the house’s energy efficiency. HERS is a scheme that we at EECA run. The house achieved a 9 star HERS rating which is only one step away from being a zero energy house (the rating scale is between 1-10). This is likely the highest rating a house in NZ has received to date – we are verifying this today but it looks highly likely.

A few other points to note:

  • While this is not a low-cost design, it’s not luxurious either and is therefore achievable for many New Zealanders today.
  • The house has been designed to achieve good aesthetics, great comfort, very high energy and environmental performance and minimal maintenance requirements at reasonable building and minimal running costs.
  • The annual heating demand is about 85% lower than for an average new build built to code minimum requirements, and about 97% lower than for an uninsulated house in the area.
  • The owner is very happy to talk about the HERS rating publicly and welcomes any publicity.

The owner has also installed many data loggers to monitor the actual energy performance and proof that it works – this will be evaluated by the School of Architecture of Victoria University of Wellington.

As this example demonstrates, international best-practice, highly energy efficient and future-proof Kiwi home design is already achievable using products and techniques which are readily available in New Zealand and do not need to cost an arm and a leg.

As this house is a holiday house this is an opportunity for other New Zealanders who consider building to visit this house and experience the comfort of ultra-low energy houses.

The Home Energy Rating Scheme is an invaluable tool which assists New Zealanders with making informed decisions for achieving energy efficient home designs.

The key points which helped achieving such a highly energy efficient house are:

  • Compact, simple building layout
  • Good solar orientation of windows
  • Super insulated roof, walls and floor – more than twice as much insulation as required by the building code.
  • The thermally best performing double-glazed windows available in NZ have been used.
  • Thermal mass in the concrete floor and adobe walls collects the sun’s warmth on sunny days and release it overnight and on cloudy days.
  • Solar water heating for hot water and underfloor heating.
  • Attention to detail in the design.

Nelson Mail – “The house that ingenuity built”

Wednesday, April 22nd, 2009

An article in the Nelson Mail’s Home & Garden section profiles Little Greenie. Replicated here in full:

The House That Ingenuity Built

This eco-home could be a blueprint for the future. By Hayley Gale.

Golden Bay’s Lawrence Mclntyre has built one of “the most well-insulated, low-energy houses in New Zealand”. Called Little Greenie, the spectacular property is located high on a hill at the northern entrance to the Abel Tasman National Park in Wainui Bay.

The former Christchurch businessman says the one-bedroom low-maintenance eco-home in a simple rectangular style uses the best new technology available.

Having had a full analysis of the home’s construction through the Home Energy Rating System, Little Greenie scored nine out of 10 whereas most New Zealand homes score only three to five, Mr McIntyre says.

He moved to Golden Bay with his wife Antje and their two children in 2004, after living in Christchurch and the Marlborough Sounds.

Previously they’d lived and worked around the globe including Africa, New Guinea and Germany.

He says Germany is leading the world in passive solar design and hopes that more people in New Zealand will follow suit.

A trip to Germany in 2003 to visit Antje’s family inspired the creation of a passive solar building in the “simple house” (Bauhaus) German philosophy. Little Greenie, uses “the best of German technology mixed with Kiwi feeling and ingenuity’, Mr McIntyre says.

Passive solar design means heat is first attracted through the buildings orientation towards the sun, which in this case also happens to be angled towards the beautiful view across Wainui Bay.

From the floor to the walls, windows and roof, the insulation materials used have given the home more than double the insulation value of ordinary Kiwi homes, he says. He has endeavoured to make the home as low-maintenance and long-lasting as possible.

No concrete in the floor or foundations touches the ground and polystyrene has V- been placed under the floor. The home’s solar-water system is used for underfloor heating as well as providing hot water.

Three overlapping layers of high-density wool insulation in the walls and adobe bricks on the inside make for highly insulated walls. Similarly, the corrugated iron roof is insulated with two layers of wool batts.

Other features of the wood-framed home include compost toilets and argon-filled low-e double-glazing on doors and windows. The wooden window frames have clip-on aluminium on the outside for weather-proofing.

Mr McIntyre believes the home challenges the architectural world because of its simplicity and lack of “fashionable ornamental features”

“It’s so nice to experience the same temperature in every room instead of a hot spot in front of a fire and a freezing cold bedroom,” he said.

The McIntyres let out Little Greenie as a holiday retreat in addition to a beautifully renovated house truck on their 100-acre block of land.

Glowing Report

Thursday, April 2nd, 2009
HERS Report showing our score of 9/10

HERS Report showing our score of 9/10

We’ve just received our preliminary Home Energy Rating Report (HERS) from the Energy Efficiency and Conservation Authority and we’re very proud. Little Greenie gets 9/10 and as far as we know at this stage this is the best HERS rating given out so far in NZ. We’re looking into confirming this but it seems likely.

What does the HERS report mean? From the report:

The building rating is a measure of how well a home’s design, materials and solar orientation enable it to maintain a healthy and comfortable indoor temperature throughout the year.

The report also rates the house’s water heating performance:

The water heating rating is a measure of how energy efficient a home’s water heating system is.

Little Greenie received a rating of 10/10 and an indicative running cost of $41/year. That’s right $41 per year for all water heating costs!

We also get a list of Key Recommendations For Improvement:

  1. Reducing area of windows in lounge by 50% reduces heating load by approx. 60%
  2. Deleting skylights reduces cooling load
  3. Increasing thermal mass by increasing concrete topping from 50mm to 100mm reduces heating load by approx. 40%

Maybe some room for improvement then?

You’re welcome to view the full report.

Our Little Greenie on Stuff.co.nz

Thursday, March 26th, 2009

Its nice to see Little Greenie getting out and about in the media. Natalie Cutler-Welsh has written a piece for stuff.co.nz that lets a bit more of the world know about our work here.

From the article:

They talk about “the art of insulation and to treat it like the kitchen joinery”. Such a great comparison as so frequently people readily part with thousands of dollars for an impressive kitchen but skimp on insulation which is a one-off cost that’s easy on the environment and a low proportion of the overall cost.

Right on! Its really interesting to look back over NZ’s past building standards and to see how we’re finally coming around to seeing the benefits of good insulation – it means no more wood burning or electricity bills. And with the efficiencies we’re getting from Little Greenie our guests (and us when we get a chance to stay in Little Greenie) can live in comfort and luxury without worrying about the costs (in so many ways).

It’s also amazing to see the comments below the article. Clearly we’re not the only ones passionate about sustainable housing.

Brent Leslie writes:

It seems amazing that people would spend ~20k on installing a second bathroom but would get upset spending 8k-10k on a solar hot water system that could dramatically reduce energy bills each year.

Brent makes a good point and we look at our hot water system and believe its money well spent.

Its worth reading the whole article.

GB Weekly Profiles Little Greenie

Friday, August 29th, 2008

Ina Holst has written article for the GB Weekly all about our Little Greenie project:

“Fancy chicken shed” challenges fashion with function

Over the next few weeks, The GB Weekly will take a closer look at some of the ecohomes visited on the Ecofestival tour a fortnight ago.

Eco-architect Michael Thomas of Sustainable Building Alliance hosted the tour and shared his knowledge with the participants. He was part of the selection team and said the homes for the tour had been chosen on the basis of wanting to show a wide variety in type of construction, when and how these were constructed, by contractors or owner-built, the different systems used in the buildings and how these were applicable for people here in the Bay.

The first house selected for this series is “Little Greenie” introduced in the ecohome brochure as being “modern, unashamedly practical, and completely rejects frills or fashion… it is seriously hot.”

The sizzling little gem is the show home of Eco—Action Design and Build and part of Golden Bay Hideaway at Wainui Bay, which provides tourist accommodation.

As you enter the property, the road climbs up through a tunnel of native bush interspersed with glimpses of the sea. Tucked away in 100 acres of native forest, Little Greenie sits above the glistening waters and golden beaches, its clean straight lines challenging fashion with function, as Lawrence McIntyre puts it.

Lawrence designed and constructed the technology-smart holiday unit with support from his family, partner Antje and sons Omani and Finn, and his friend Grant Collings.

From his background in chicken farming Lawrence has acquired a natural knack for temperature control systems. Referring to the house as a “just a fancy chicken shed”, he said it reflected his “chicken—farmer thoughts” and had been less difficult to design than a hatchery.

Of course Little Greenie is far from just a chicken shed, and the way in which the high—tech components and common sense have come together is convincing. Little Greenie encapsulates Lawrence’s beliefs in low maintenance and longevity, ease of construction and value for money. Quality insulation and design solutions that enhance energy efficiency, solar passive heating and heat transfer were critical

The house is oriented to the sun so that capture of the sun’s heat is maximized. In turn, the use of raw materials such as concrete, mud bricks and double—glazed, argon—filled windows ensures this heat is stored as thermal mass. Polystyrene has been sandwiched between the ground and the concrete floors to act as a thermal break. Overlaying wool-block insulation creates an R (R-regulated) value of 5.1 in the walls and of 7.4 in the roof. R-values are applied to rate the insulation of building materials and walls, roof windows and floors. The average R—value in ordinary homes is half the Little Greenie’s figure.

The design allows for the redirection of warmth behind half adobe internal walls, resulting in delayed heat at the south wall. Similarly, warm air is directed through air vents into the compost toilet for improved performance.

The home’s solar hot water system also supplies underfloor heating, backed—up by a wood-burning boiler. Low—wattage LED lights are installed throughout the house.

”I am not a perfectionist, but I am after High quality, and everything has to be practical, simple and long-lasting,” said Lawrence.

So, the construction avoids unnecessary joints, reducing water entry points and extra building costs, Special attention has been paid to keeping maintenance to a minimum so more time can be spent enjoying the spectacular views from a deck-chair.

Many of Lawrence’s ideas were collected on his travels, and while living in Germany he was impressed by the energy efficiency of the homes and the consistent temperature maintained in the rooms within.

With Little Greenie, Lawrence fused his ideas of low—impact, alternative building with long-standing and proven New Zealand building techniques such as using normal stud walls and trusses for the roof. Many of the materials, services and expertise were sourced locally. “The local suppliers and craftspeople have been fantastic. They really enjoyed working on this house and the council has been very supportive, too.”