Posts by dymonite69 • Home Renovation & Building Forum

Re: heat blocking window treatments, honeycomb? sunscreen?heWindows & Doors

6 May 2013

May 06, 2013 6:45 pm

Sorry to drag up an old thread, but wondering if anyone has had any recent experiences with beautiful blinds. I'm looking to head down this path. Initial service was good. The smaller blinds work fine. Material does crease if bent. Some problems with construction of the the large width blinds - cor...

Initial service was good. The smaller blinds work fine. Material does crease if bent. Some problems with construction o...

Re: Thermal Mass vs InsulationEco Living

20 September 2011

Sep 20, 2011 11:02 pm

I am not overly convinced that a slab in contact with the ground is necessarily a good thing. It greatly depends on the average soil temperature in your location (which varies with climate and water content). It can result in significant loss of heat through the floor despite the increased capacity ...

I am not overly convinced that a slab in contact with the ground is necessarily a good thing. It greatly depends on the ...

Re: Insulation in the tropicsHeating, Cooling & Insulation

23 August 2011

Aug 23, 2011 9:29 am

When attaching the iron, put some battens down to create an air gap and then line with foil then your cladding. This will also create a chimney effect where air constantly cools the gap between the cladding and the container wall.

When attaching the iron, put some battens down to create an air gap and then line with foil then your cladding. This wil...

Re: Solar system questionsHeating, Cooling & Insulation

23 August 2011

Aug 23, 2011 12:05 am

Typical annual solar output is about 1600 kWh/kW system. In Adelaide it is about 2/3rds of this in winter and 1/3rd higher in summer. i.e. for a 1 kW system - 4.4 kWh/day (average). 2.7 kWhr/day (winter), 5.7 kWhr/day (summer). Check out typical monthly outputs in Adelaide from this site. pvoutput.org

Typical annual solar output is about 1600 kWh/kW system. In Adelaide it is about 2/3rds of this in winter and 1/3rd high...

Re: Insulation in the tropicsHeating, Cooling & Insulation

23 August 2011

Aug 23, 2011 12:00 am

Sisalation will block > 99% of radiant heat which is the main source of heating during the day. As mentioned, good shading of walls and roof by tall trees help significantly as radiant barriers as well.

Sisalation will block 99% of radiant heat which is the main source of heating during the day. As mentioned, good shading...

Re: Where should the recycled air vent goHeating, Cooling & Insulation

22 August 2011

Aug 22, 2011 11:56 pm

Ceiling fans set at low speed can push the hot air down and improve circulation.

Re: Cooling help..Heating, Cooling & Insulation

22 August 2011

Aug 22, 2011 11:52 pm

External shades are a more flexible solution. Film also blocks useful sun in winter.

Re: Which roofing solution to use for coolest house?Heating, Cooling & Insulation

22 August 2011

Aug 22, 2011 11:51 pm

Reflective foil laminate - RFL e.g. Sisalation under the roof will block out >99% of radiant heat transfer. It can reduce AC requirements by up to 20%.

Reflective foil laminate - RFL e.g. Sisalation under the roof will block out 99% of radiant heat transfer. It can reduce...

Re: How to size ac's for 6 star homes?Heating, Cooling & Insulation

19 June 2011

Jun 19, 2011 12:57 pm

http://www.affordair.com.au/whatisaircon/whatisaircon.htm#inverter

http://www.affordair.com.au/whatisairco ... m#inverter

Re: How to size ac's for 6 star homes?Heating, Cooling & Insulation

18 June 2011

Jun 18, 2011 5:49 pm

Neither of them is oversized, as this happens even if it's very cold outside and they have to work hard when they turn on again. Sizing is based on the steady state heat loss of the building when it has reached the target temperature. It isn't related to how quickly it takes to be heated up from co...

Sizing is based on the steady state heat loss of the building when it has reached the target temperature. It isn't rela...

Re: Orientation question - how far off north is still optimaEco Living

15 June 2011

Jun 15, 2011 7:37 pm

The living room will be cold all winter.

15 June 2011

Jun 15, 2011 10:12 am

And your relative humidity, indoor temp and outdoor temp during the night?

Re: Orientation question - how far off north is still optimaEco Living

15 June 2011

Jun 15, 2011 10:11 am

It is generally easier to shade a house with excess solar exposure in summer than try to improve one with inadequate sun in winter. However, you will tend to need vertical shades for east and west aspects because of the low angle of the sun. They can be blinds or angled vertical louvres that allow s...

It is generally easier to shade a house with excess solar exposure in summer than try to improve one with inadequate sun...

Re: How to size ac's for 6 star homes?Heating, Cooling & Insulation

15 June 2011

Jun 15, 2011 9:39 am

We have a passive solar design with R 3.5 ceiling insulation R 2.5 wall, reflective foil in all and double glazing. Winter temps get down to around 2-5 degrees. We have a Daikin Inverter AC that was sized to the standard 0.15KW/m2. We tend to zone at the most half of the house. Within 30min the ther...

We have a passive solar design with R 3.5 ceiling insulation R 2.5 wall, reflective foil in all and double glazing. Wint...

Re: 1st rate energy reportsHeating, Cooling & Insulation

14 June 2011

Jun 14, 2011 11:58 pm

The absolute values are probably not all that helpful. It is more a way of comparing the relative efficiency of the house construction. Occupancy behaviours can cause 50% of the variance in conditioning requirements e.g. letting the sun in by opening curtains instead of turning on the heater, turnin...

The absolute values are probably not all that helpful. It is more a way of comparing the relative efficiency of the hous...

14 June 2011

Jun 14, 2011 5:14 pm

Where is the condensation occuring? Frame? Edge of glass? Centre of glass? Is it all over or localised to one part?

13 June 2011

Jun 13, 2011 8:33 pm

Can you describe the rooms where this is most prominent e.g. occupancy levels, usage, ducts/openings. Window coverings can increase the problem because it exaggerates the temperature gradient between the room and the window pane.

Can you describe the rooms where this is most prominent e.g. occupancy levels, usage, ducts/openings. Window coverings c...

Re: Alfresco heating optionsHeating, Cooling & Insulation

13 June 2011

Jun 13, 2011 3:05 pm

A convective heater heats the air which then just gets blown away by a open area. Radiant heat transmits heat directly to the nearest solid object.

A convective heater heats the air which then just gets blown away by a open area. Radiant heat transmits heat directly t...

13 June 2011

Jun 13, 2011 3:04 pm

Condensation occurs when warm moist air strikes a cold surface. This occurs if the temperature of the surface is below the dew point (which is a function of indoor temperature and humidity). Have you got sources of moisture e.g. showers, laundries, wet clothes. You may need to increase your ventilat...

Condensation occurs when warm moist air strikes a cold surface. This occurs if the temperature of the surface is below t...