Healthy Home Guide

Healthy Home Guide

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The Benefits of Thermal Ventilation 

A building’s air conditioning system is typically responsible for around 50% of the base building’s energy consumption. The other 50% typically includes other services such as common area lighting, domestic hot water, lifts, etc. As such, any reduction in air conditioning energy consumption or efficient energy utilisation will offer significant savings in total building energy consumption and carbon emissions.

Night purging, displacement ventilation, Positive input ventilation with 100% fresh air intake (Solar air collectors), high thermal mass materials and a co-generation plant be adopted to significantly contribute to the health of occupants, the reduction of carbon dioxide emissions and reduce energy consumption of the building.

The use of all these initiatives will reduce carbon emissions to 44% of a 4.5 star Australian Building Greenhouse Rated building.

Building loads determine the heating and cooling requirements of a building and come from sources such as occupants, equipment, lighting and the sun.

A typical large-scale building can have hourly energy loads up to the following – lighting 95 kWh, occupants 45 kWh, Equipment 155 kWh, (summer solar 60-110 kWh, mid-winter 30-65 KWh). On a monthly basis this could lead to a mean usage of between 60,000 and 80,000 kWh.

Using a thermal (Solar air collector) panel system for both night flushing for cooling and daytime solar absorption for heating introduces 100% fresh air into the building, thereby flushing out all contaminated air without mixing. This greatly increases air quality, health wellbeing and productivity of all its occupants. Following this, maintenance costs are greatly reduced due to minimal hourly use of boilers/chillers.

As most large-scale buildings are built on concrete and other reasonably good thermally absorbing materials, they are capable of storing and releasing large amounts of energy (sensible heat). Put simply, in summer - the building will store the coolness of the night and use it to cool the building during the day. In winter, the building will attain the solar heat energy and use it to maintain higher core temperatures at night.

“Thermal mass, correctly used, moderates internal temperatures by averaging out diurnal (day/night) extremes.

Poor use of thermal mass can exacerbate the worst extremes of the climate and can be a huge energy and comfort liability.” #i

The intent of a ‘green’ building is to minimise the emission of greenhouse gases, namely carbon dioxide emissions through efficient energy usage. This is will be dependent on energy utilisation between sources such as electricity, gas, solar, wind or energy from a co-generation plant, etc

Ban Ki Moon has stated, “Leaders must act. Time is not on our side.” He said that quick, decisive action would build a better and sustainable future, while inaction would be costly.

“The building’s of our cities are our businesses, the businesses of our cities are our leaders, and it is time for simple cost effective change.” EC

In the state of Victoria, Australia, gas has a CO2 co-efficient of 0.21, which is much less than the 1.34 co-efficient for electricity. This means that electricity pollutes about 6.4 times more than gas and electricity usage is most undesirable. #ii

It is obvious that using thermal passive input ventilation system with 100% fresh air, improves longevity and cost effectiveness of the system. In this ventilation system offers advantages such as: -

·         Carbon emissions – reducing CO2 emissions to 40% of a 4.5 star building

·         Air quality – by providing 100% fresh, non-recycled air, as well as using the benefits of continuous ventilation to flush warm contaminated air out instead of mixing it within the space

·         Equality of access – all occupants have access to the cool ceiling above and floor vents are evenly distributed which passively proves a more even temperature throughout the space

·         Increased productivity – through the reduction of noise, the increase in air quality, and the even distribution of cool air, occupants are healthier, more comfortable, have an increased state of wellbeing and are more productive.

·         Maintenance – is much less for chilled night flush system as there are less moving parts

·         Increased lifespan – the chilled night flush system has an increased lifespan because of reduced plant loads and less maintenance problems

·         Space saving – Thermal heat and night flush (Solar air collectors) systems eliminate the need for additional internal high volume ductwork, minimising ceiling voids requirements and increasing opportunities for refurbishment as well as increasing net leasable areas opportunities, all solar air collector systems can be retro fitted and adapted to existing air ventilation systems.

·         Energy efficiency. Friction losses and lagging are eliminated by the system and the building fabric contributes to the cooling system.

·         De-humidification. With solar air collectors, all daytime air has the enormous benefit of de-humidification, greatly reducing the possibility of increased condensation.

To improve a building’s energy savings even more, the use of secondary external shading to Northern/Western walls, use of thermal (light colours) paints and external screening/shading to glazed areas.

Further information on solar air collectors can be found at


# i -

# ii -

By Eamon Corless - Jan. 2015

February 5th 2015

Healthy Houses with Solar Heating

Healthy indoor climate with solar heating
The indoor climate in well insulated modern houses is normally healthy for your fuel bill but certainly not always for your health. The problem stems from the missing air renewal.

Gone are the days of natural ventilation through numerous small leakages in our houses. Instead we find tight windows and doors, while walls and ceilings are sealed by vapor barriers. Moisture on the inside of the double glazing has become a sign of an unsound indoor climate.

Ventilation lags behind
Most new houses attempt to ensure a sound indoor climate by ventilation through fresh air ducts.However, the air renewal supply of many buildings has not been dimensioned to meet the actual needs of modern homes.This causes a bad indoor climate, and in serious cases it may involve health risks because of dry rot in the walls and structure of the building.

Lumpy sugar and stale air in your home
Buildings left unused part of the year are particularly exposed to the problem of damaging air moisture content outside of the holiday season.

The indoor climate suffers from the relatively low temperatures and the closed windows and locked doors. Typical signs are stale air and lumps in the sugar bowl when the house is being used during weekends or opened for the season.

SolarVenti without any operating costs
Almost 60,000 customers have experienced that the SolarVenti can solve the problem of moist and unsound indoor climate – without any operating costs. This is true even on days or during periods when sunlight is scarce. When the system has been in operation for some time the overall moisture content of the building materials and the furniture will have been lowered and the living conditions for the dry rot destroyed.

Moreover, an increasing number of clients find that the SolarVenti is capable of removing moisture and creating a sounder indoor climate in houses designed for year-round use. To this may be added a list of other potential applications, e.g. for basements, caravans, boats, containers, museums etc.

February 4th 2015
<p>Want the perfect temperature and humidity in your home, look no further than the SolarVenti Residential unit. </p>

Want the perfect temperature and humidity in your home, look no further than the SolarVenti Residential unit. 

February 4th 2015


Fighting heat this summer is the number one priority, but is itreally the enemy?

“It’s not really the heat at all, it’s the humidity,” says Eamon Corless of Solair. “Your body normally cools itself through perspiration, so when sweat dries on your body it makes you feel cooler. When humidity is high, the sweat can’t evaporate into the air. The result is that hot and sticky feeling that you get in summer. You end up feeling much hotter than the actual temperature.”

The everyday Australian would turn on an air conditioner to combat the discomfort, which is costly and has a negative impact on the environment. But there is another way, a product that is environmentally friendly as well as free to run. 

Solar powered ventilation is a relatively new technology. The units self generate their own power through an external solar cell - meaning no running costs or additional maintenance. When the sun shines, fresh air in the solar panel is dehumidified and pumped into your home. The fresh, dry air displaces the stale, humid air, creating a comfortable indoor environment.

“It’s like getting a good southerly buster through your house,” said Mr Corless.

“It can eliminate the need for air conditioning or, if air conditioning has already been installed, it will improve the efficiency of the air conditioning unit and significantly decrease running costs.”

“The units operate independently, require no maintenance and, best of all, they usually pay for themselves within 2-3 years,” said Mr Corless. “Solar ventilation is the future of heating and cooling in Australia. It will provide you with a comfortable home all year around. In winter the units warm your home and reduce your heating costs. They will also eliminate problems caused by mould and condensation in winter or summer.”

February 4th 2015

Cool your home this summer - without the cost of air conditioning!

Did you know the main cause of discomfort in our hot summer, is not heat, but humidity?

The human body has an inbuilt cooling system:’ we get hot, then we sweat’ – it’s as simple as that.  The sweat from our pores dries on our body and causes us to cool down.  Not terribly glamorous, but highly effective.

But summertime humidity interferes with this process. The air becomes laden with moisture so that sweat can’t evaporate and so cool us down.  The result is that HOT, STICKY feeling that we all associate with summer. 

Many people turn to air conditioning units in an attempt to seek relief inside their homes.

But there is another way. One that doesn’t come with the enormous running costs of air conditioning or the risks associated with continuously recirculated air.

A Solarventi unit can transform your home this summer with fresh, dry air. Best of all there is no ongoing running costs because the unit is powered by solar energy, so it’s good for you as well as the environment.

How does it work?

The unit is installed on your roof or the wall of your house.  It contains a solar panel which powers a fan connected to an air duct and controller.

When the sun shines, the air in the unit is heated – a process which alsosanitises and dries the air.  This air is then pumped into your home and replaces the stale, humid air with clean, dry air.

The result is that the air inside the home feels cooler and far more comfortable, without doing damage to your electricity bill.

Make friends with your environment

On top of a cool, dry home in summer, the Solarventi will benefit your home all year around.

  • In winter it will reduce the cost of heating your home by pumping warm air into your house
  • It will also prevent the build up of condensation on your windows overnight
  • The flow of dry air will eliminate mould, mildew and damp problems
  • The unit also helps to reduce the incidence of asthma and allergies because the air is sanitised by the unit, eliminating pollen and other allergy triggers
  • Your home will feel fresh even when it is has been locked up for hours, days or weeks. This makes it an ideal solution for holiday homes as well as normal homes.

Best of all the Solarventi provides an environmentally sustainable solution to our unique Australian climate.

How is it installed?

A Solarventi can be installed for you by a professional fitter or they can be purchased as DIY kits.

January 7th 2015

SolarVenti Cartoon - Keep damp away today!

December 23rd 2014

Welcome to Solair's Blog

Here we will be posting interesting articles, examples of previous work and general information for your enjoyment and convenience!

Stay tuned for more soon!

December 3rd 2014