# Sustainability

## What Size Rainwater Tanks Do You Need – 2

How Do You Plan To Use The Water? The most common uses for rainwater are for toilet flushing, garden watering and car washing. Toilet Flushing Basically a new duel flush Australian toilet will use 6 L for the main flush…

## Winter Sun

If you are going to get as much winter sun inside your house you want to minimise shading from neighbours and boundary fences/hedges. Here is how to check………………….. Ideally you should be aiming for around 6 of hours of sunlight…

In Passive Solar I talked about shading North facing windows. This does not mean roller shutters or blinds that pull down over the window. Although they do keep out the sun you lose any views, and they make the rooms…

## Passive Solar – What Does It Mean?

Do you want a house that is filled with natural light in the summer without overheating, and minimises your heating bills in winter? ……….If you do, then a passive solar house is what you need. Here are some of the…

## What Size Rainwater Tank 3

Other posts explained how to calculate: How much rain you can collect and How to work out how much water you will need to last for a month without rain. From your calculations find out the month of lowest average…

## Types of Solar Panels for Electricity

From some of the adverts you see you would think there is only one sort of solar panels…. in fact there are several alternatives. The type of panels generally available are: Monocrystalline solar panels The highest cost but the most…

## Insulation Basics – Calculating R Values

A previous post –introduced R and U values   In this post we will demonstrate how to calculate R values.   Well it all starts with the thermal conductivity of the building material. The ‘k’ value. This is a measure…

## Insulation Basics – ‘R’ and ‘U’ Value

R1.5 Batts, R2.0 Batts……. all the way up to R6.0 Batts, but what does it all mean? The R value is a measure of the thermal resistance of the component of the material. In other word how hard it is…

## Rainwater – Safety

Millions of people have lived long healthy lives drinking rainwater but that’s doesn’t mean that rainwater is entirely pure, or completely safe for everyone. Composition The following Chemicals are commonly found in rain: Hydrogen, Ammonium, Calcium, Magnesium, Potassium, Sodium, Suphur…

## Solar Electricity – Is It Worthwhile? (2011)

Since this post was written in 2011 there has been many changes; in subsidies, the cost of systems, and  Power Supplier charges. For the  an updated post see:  Solar Electricity – Is It Worthwhile? (2014) There is a lot of…