Atlas Paving

Customised Airconditioning

Atlas Paving

Atlas Paving

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Heating and Cooling Overview

Decisions about heating and cooling your new home are most important and should be incorporated at the design stage. Firstly try to integrate solar passive principles in the design of your new home. This will minimize all additional heating and cooling required in your house.(See Solar Passive Design.) Also consider the zoning of your house, living areas though they may be open plan should still be able to be shut off from bedroom wings and utililty areas. It is important to choose the appropriate system for your needs. There are a wide variety of options all suited to different requirements, budgets and environmental concerns. Always buy the highest efficiency star rating you can afford, it will save you money in the long run.

Search and Compare Appliances at www.energyrating.gov.au

Consider:

  • Do you require a system to provide both heating and cooling or just one or the other
  • Do you need heating/cooling for living areas only or the whole house?
  • Install window treatments that reduce temperature transfer
  • Buy the correct size system for the room/house
  • Set thermostats to the lowest comfortable heat setting in winter
  • Have zones that can be shut off by closing doors within the house
  • Have zones installed with your ducted air conditioning unit
  • Insulate the ceiling (standard practice for WA)
  • Tint or double glaze windows
  • Prevent heated/cooled air escaping with exterior door and window seals

Heating Only

  • Natural Gas Unflued                                              One area
  • Natural Gas Flued                                                 One area
  • Natural Gas Ducted Heating                                  Whole House
  • Hydronic Gas                                                        Whole House
  • Electric Space Heating Radiant or convection      One area
  • In Floor Electrical Heating                                      Whole House
  • Geothermal                                                            Whole House

Cooling Only

  • Ducted Evaporative                                               Whole House
  • Split System Cooling only (not reverse cycle)      One area

Heating and Cooling

  • Ducted Reverse Cycle                                         Whole House
  • Split System Reverse Cycle                                 One area
  • Multi Split System 2 or more outlets                     Up to 3 areas
  • Geoexchanger                                                     Whole house

The Facts

Heating Only

Natural Gas Unflued

This is a Gas heater that uses a a gas bayonet fitting and a power point within the room. They are available from appliance stores.

Portable appliance

  • Supply efficient heating for a single room only.
  • NOT suitable for bedrooms
  • Require ventilation grills. (If you have a gas bayonet point in the room there will be vents already installed as per the Australian Building Code)
  • Inexpensive to purchase and run
  • Models with automatic timers are a good idea
  • A built in thermostat will also save you money

Can have health impact due to carbon monoxide and nitrogen dioxide being given off. Adequate ventilation and correct installation imperative to reduce airborne polutants- see link http://www.health.nsw.gov.au/factsheets/environmental/gas_heaters_fs.html

Natural Gas Flued          

  • Built in gas heater
  • Flue to vent emissions to the exterior of the house (no carbon monoxide or nitrogen dioxide in the house)
  • Can be radiant (heating people and objects) or convection (heating air) heaters
  • Convection provides a rapid response when tuned on
  • Modern flame designs or ‘log fire’ models
  • Can have remote controls
  • Thermostat models available

Natural Gas Ducted Heating     

  • Heats the whole house or selected zones
  • Fast
  • Thermostat and timers available to reduce consumption
  • Installation suitable for under floor or in the roof space
  • Can be combined with refridgerated cooling using the same ductwork, then referred to as Climate Control
  • Brands vary in efficiency and price

Hydronic Gas Heating                

This system uses a natural gas, a gas boiler or heat pump to heat water that is then circulated around the house to radiator panels or skirting board convectors

  • Provides combination radiant and convective heat
  • Effective heating in 15-30 minutes
  • Hot water taps can be piped off the system in some units providing quicker hot water delivery
  • Possible to link to a solar hot water system to reduce heating bills
  • Can install towel rails as heater panels to wet areas
  • Silent
  • No dust
  • Ensure unused radiator panels can be shut off as desired
  • Choose a low water content boiler
  • Not suitable for non mains gas areas
  • Insulate any exposed pipe work
  • Some systems can be combined with additional pipe work in the slab to provide in floor heating

In Slab Floor Heating       

  • Radiant heat supplied by Electric cables or hot water pipes laid in the concrete slab floor (hot water option as per Hydronic Gas)
  • Best results with tiled floors or polished concrete,
  • Must be left on for the winter season as slow (24hrs) to warm up
  • Set thermostat at a moderate temperature (18c) to reduce consumption
  • Install zones with individual controls
  • Have electricity run on ‘off peak’
  • Costs upwards of $30m2 to install
  • Totally silent

Electric Space Heating Radiant or Convection    Available through any appliance retailer

  • Usually portable, i.e. plug in radiators, electric fans, plug in radiant heaters
  • Bathroom 3 in 1 (exhaust, light, heater) heaters fitted to the ceiling
  • Suitable for single room heating
  • If using peak electricity, expensive to run
  • Inexpensive to buy
  • Expensive to run and environmentally unsuitable as a long term heating solution to living areas
  • Suitable to heat rooms for a short period (Bedrooms Bathrooms)

Cooling Only

Ducted Evaporative Air Conditioning     

System provides cooler air indoors by forcing dry hot air through moist filter pads. Air is then pumped into the house through ducted ceiling vents. The clean fresh air will be continually pumped into the house. Pollens and pollutants will be trapped by the filter pads making it an ideal system for allergy sufferers.

  • Can still have doors and windows open while operating
  • Roof mounted- visible
  • Not effective in humid weather
  • Can combine with a reverse cycle split system for humid days
  • Cheaper to install and run than reverse cycle (as little as 5c per hr)
  • Check how often system dumps the water
  • Environmentally sound choice

Heating and Cooling

Ducted Reverse Cycle               

This whole house system operates like your fridge to cool/heat the air indoors, it is the most efficient electric system to heat your home with, however cooling is not as efficient

  • Ducted through the ceiling (or under raised floor-not concrete slab)
  • Compressor unit located outside
  • Must close doors and windows to operate efficiently
  • Buy a system with an inverter, they use less electricity
  • Have zones installed to reduce consumption
  • Check the energy star rating..….the more stars the better
  • Adds value to your home
  • Cooling should be turned on low at the start of a hot day rather than on full at 4pm to reduce power load

Reverse Cycle Split Systems      

  • Refrigerated system as above
  • Suitable for one room or open plan area depending on size purchased
  • Console or fan system wall mounted inside
  • Must be on an exterior wall
  • Compressor located outside, normally as close as possible to the wall unit to reduce cost
  • Ensure correct size unit is installed
  • Remote controller
  • Thermostat and timer

Multi Split System

  • Same as above except unit has multiple (up to 3) wall hung outlets in multiple rooms with one compressor outside

Climate Control

System provides ducted electric heating and gas cooling within the one unit to the whole house. More common in the eastern states
Effective energy usage for both heating and cooling
Look for units with

  • Timers
  • Remote controls
  • Thermostats
  • Zones
  • Expensive to install, though cost of system will be reflected in your homes value

Geothermal/ Geoexchange Heating and Cooling  

This is a type of system that takes advantage of the earth’s temperature in excess of 2metres under the surface. In winter the earth is warmer than the above ground temperature and in summer cooler. These systems insert pipe work underground and then use a variety of heat exchangers to take advantage of the temperature difference.

System can be as simple as a fan driven air exchanger to pump the cooler/warmer air from underground into the house, or can be combined with a compressor or condenser unit.

  • The cooler/warmer temperature underground can also be used to boost current heating or cooling systems.
  • These systems can be for heating or cooling only or for both
  • Installation and set up cost are normally recouped within 3-10 yrs dependant on the system you choose
  • Super environmentally friendly

Helpful Hints

Search and Compare Appliances at www.energyrating.gov.au

Once you have achieved the desired room temperature don’t allow the air to escape the house. Remember to consider

  • Insulation
  • Door Seals
  • Window tinting and dressings

Related Topics

Solar Passive Design

Window tinting

Insulation

Window Dressings

Heating and Cooling