Mon, 4 June 2012
Last week, an evaluation report on the Warm Up New Zealand: Heat Smart Programme, was released. It makes for some interesting reading, including a cost benefit analysis of the programme.
Check out http://www.healthyhousing.org.nz for more details
Other news to check out:
News real now online at http://www.homestylegreen.com
NZGBC Sustainable Housing Summit. Be there!
Keynote speaker is Bill Dunster from ZEDfactory
Also, check out the most exciting roof in New Zealand and the flash new website of the Zero Energy House: http://www.zeroenergyhouse.co.nz
Thu, 24 May 2012
This week I caught up with Alex Reiche for the very first Home Style Green expert interview.
Alex Reiche is the Founder and Managing Director of EnviroSpec, an online register of 'Eco-Preferred' products.
Check out EnviroSpec's interacitve house to find the best products for your building project.
Wed, 16 May 2012
In today's cast, I complete our introduction to heating systems with a look at central heating.
Common to all central heating systems are three main components:
1. The fuel
2. The engine or heater
3. The distribution system - pipes, ducts and outlets
There are two main mediums for transfering heat. Air is common with gas-fired heaters and large ducts but is not as effective as water based systems.
Air ducts can lose up to 1 degree per m of duct.
Heating that is not true central heating includes inslab or undertile electric element heating, heat transfer and ventilation system.
Sat, 5 May 2012
After insulation, heating is the next thing most people look at when improving the comfort and warmth of their home.
In this episode of Home Style Green, I discuss room heaters:
In the episode I refer to the 'carnot cycle'. This is the awesome thermodynamic principle behind air conditioning and refrigeration. Refer again to our trusty Wikipedia for a good article about the detailed physics:
Of course the best form of heating is free from the sun. But making the most of passive solar heating is a design challenge and there's usually not a lot that can be done to improve this once a house is built.
So if you're trying to heat an existing, cold home, what's the best option?
Sun, 15 April 2012
In part 2 of this insulation introduction, I discuss the main types of insulation used for ceilings, floors and wall.
For more information about insulation materials, check out Level.org.nz from BRANZ:
For more on the properties of wool, including great microscopic imagery, check out:
Sun, 1 April 2012
In this episode of Home Style Green, I discuss the basic physics of insualation. I give an overview of the three main types of heat transfer, that is conduction, convection and radiation. Most bulk insulation products on the market rely almost entirely on reducing conduction.
I discuss what 'R-Value' means and the common materials of household insulation products.
For more information, visit our site at:
Also, for a more indepth discussion on insulation and 'R-Values', its hard to go past Wikipedia:
Wed, 21 March 2012
1 Home Style Green: Introduction and getting into insulation with EECA's Energywise Warm Up New Zealand subsidy scheme
Welcome to Episode 1 of Home Style Green, the podcast about how to live a healthy and happy lifestyle without it costing the Earth.
I'm Matthew Cutler-Welsh: Engineer, Dad, Homeowner and someone who's passionate about making urban environments more sustainable.
This is my first podcast and my objective is to share ideas about building green homes, with style.
Links in today's cast include: