What research are the recommendations based on?

Our recommendations are built on authoritative Australian sources: the Australian Government's YourHome guide (yourhome.gov.au) for passive cooling principles, the National Construction Code (NCC) climate zone classifications, CSIRO housing research on thermal comfort, and NatHERS energy rating guidelines. Product recommendations feature items rated by CHOICE and verified on ProductReview.com.au.

Is CoolMyHouse really free?

Yes, completely free with no catches. You get personalised recommendations, a PDF action plan, and shareable results. We don't sell your data. Some product links are affiliate links (we may earn a small commission if you purchase), but this doesn't affect which products we recommend.

I already have air conditioning. Will this help me?

Absolutely! Many of our highest-impact recommendations help you use your existing AC more efficiently. We'll suggest strategies like optimising your ducted zone controls, pre-cooling before heatwaves, using ceiling fans alongside AC (which lets you set the thermostat 2-3°C higher), and reducing heat gain so your AC doesn't work as hard.

We've got you covered. When you select 'rent', we automatically filter to non-permanent solutions: portable evaporative coolers, removable window film, internal blockout blinds, door draft stoppers, and behavioral strategies like night purging and cross-ventilation.

Does this work for apartments and units?

Yes! While some recommendations are house-specific (like roof ventilation), many apply equally to apartments: window film, internal blinds, ceiling fans, sealing air gaps, cross-ventilation strategies, and portable cooling options.

What about two-storey homes?

Two-storey homes have unique challenges - heat rises, making upper floors significantly hotter. We provide specific recommendations: ensuring adequate ceiling insulation, installing ceiling fans on the upper floor, using stairwell doors to contain cool air, and optimising ducted AC zones.

How much can I actually save?

Typical Australian households spend $600-1,200/year on cooling. Our users commonly save 30-50% by implementing high-impact recommendations. External shading on west windows can save $100-250/year, ceiling fans used with AC can save $100-300/year, and proper ceiling insulation can save $180-400/year.

What makes west-facing windows so critical?

The afternoon sun (1-6pm) hits west-facing windows at a low angle, penetrating deep into rooms. A large unshaded west window can add 1-2kW of heat - equivalent to running a bar heater! External shading blocks 80% of heat before it enters, while internal blinds only block 20-30%.

How do climate zones affect my recommendations?

Australia has 8 distinct climate zones, and strategies that work in Perth can fail in Darwin. In hot-dry climates (WA, SA) with humidity under 40%, evaporative cooling is excellent. In hot-humid climates (QLD, NT) with 60-80% humidity, evaporative cooling is ineffective - you need refrigerative AC instead.

Can I trust the product recommendations?

We only recommend products that are highly rated by Australian consumers (4+ stars), readily available (Bunnings, Amazon AU), and appropriate for your situation. Some links are affiliate links, but this never influences our recommendations.

Can I share my results?

Yes! You can share via a unique link (which includes your assessment data so others see your specific recommendations), get a detailed PDF report emailed to you, or print the page.

CoolMyHouse

Ceiling Fans vs Air Conditioning

Quick Verdict

Ceiling fans are ideal for temperatures up to 30-32°C and provide huge energy savings. Air conditioning is necessary for extreme heat (35°C+) and high humidity. The best strategy is using both together - fans allow 2-3°C higher AC thermostat settings.

Side-by-Side Comparison

Factor	Ceiling Fans	Air Conditioning
Upfront Cost	$150-$800 (installed)	$1,500-$4,000 (split, installed)
Running Cost	$0.01-$0.03/hour	$0.45-$0.70/hour
Cooling Power	Feels 3-5°C cooler	Set to exact temperature
Best Climate	All climates (up to ~32°C)	All climates
DIY Install?	Yes	No

Ceiling Fans

Creates airflow that provides wind-chill cooling effect. Does not actually lower air temperature.

Pros

95% cheaper to run than AC
Effective up to 30-32°C
Can be used with AC to reduce costs
No outdoor unit needed
Works during power shortages (with battery)

Cons

Only works when you're in the room
Does not actually cool air temperature
Ineffective above ~32°C alone
Does not dehumidify
Some noise on high speeds

Air Conditioning

Actively cools and dehumidifies air. Maintains set temperature regardless of outside conditions.

Pros

Actually lowers air temperature
Works in any conditions
Precise temperature control
Dehumidifies in humid climates
Cools room even when unoccupied

Cons

20-40x more expensive to run
Requires professional installation
Outdoor unit takes up space
Carbon footprint higher
Recirculated air can feel stuffy

Climate Zone Guide

Hot-Dry Climates (WA, SA, Inland)

Ceiling fans are highly effective in dry heat as sweat evaporates readily, providing good cooling sensation. They can handle most days up to 35°C in dry climates. AC needed only for extreme heat.

Hot-Humid Climates (QLD, NT)

In humid climates, ceiling fans are less effective as sweat doesn't evaporate well. AC with dehumidification is often necessary from about 28-30°C upwards. Fans still help circulate cooled air.

Temperate Climates (VIC, NSW, ACT)

Ceiling fans can handle most summer days in temperate climates. A small split system for the occasional extreme day is usually sufficient. Fans + night purging is very effective.

Cost Analysis

Running a ceiling fan 8 hours costs about $0.08-$0.24. Running a 5kW AC costs $3.60-$5.60. Over summer (120 days), fans cost $10-$30 total; AC costs $430-$670. Using fans WITH AC (thermostat 2-3°C higher) saves approximately $100-$200 per summer.

Frequently Asked Questions

Can ceiling fans replace air conditioning?

Partially. In mild climates (Melbourne, Hobart) and temperate conditions up to 30°C, fans are often sufficient. In extreme heat (35°C+) or high humidity, AC is necessary. Many households use fans as primary cooling with AC for occasional extreme days.

How do I use ceiling fans with air conditioning?

Run ceiling fans on low-medium speed while AC is on, and set the AC thermostat 2-3°C higher than usual. The air movement makes it feel just as cool while using significantly less energy. This can cut AC running costs by 30-40%.

What size ceiling fan do I need?

Room size determines fan size: up to 10m² needs 900-1000mm fan, 10-20m² needs 1200mm, 20-35m² needs 1400mm, 35m²+ needs 1500mm+ or multiple fans. For bedrooms, choose DC motors for quiet operation.

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