How We Helped a Nowra Home Slash Energy Bills by 40% with Ducted Air Conditioning
Introduction
Location: Central Nowra
Service: Full Ducted Air Conditioning Installation
Client Type: Residential
Result: 40% lower cooling costs + improved year-round comfort
A Nowra family contacted Denali Air Conditioning looking for a whole-home climate solution that would be energy-efficient, quiet, and capable of handling Nowra’s hot summers and cool winters. Their existing setup included multiple window and portable units, costing them thousands per year in running costs.
This case study outlines how we replaced outdated equipment with a modern, zoned ducted system that significantly reduced their energy bills and delivered better, more even comfort throughout their home.
Summary of Results
- 40% reduction in annual cooling costs
- Quieter operation across all rooms
- Custom zoning for kids’ rooms, living areas and master
- Consistent temperatures in every part of the home
- 24/7 climate control with advanced smart wall controller
Client Background
The homeowners, a family of four in central Nowra, were relying on three old window units and a portable air conditioner. Temperatures varied dramatically from room to room, and running costs had become a major concern — particularly during summer and winter peak months.

They needed a solution that was reliable, efficient and discreet, with the ability to cool and heat the entire home without noise or high bills.
The Challenge
A few key issues had to be addressed:
- High running costs due to inefficient older units
- Uneven temperatures, especially in bedrooms during summer
- Inconsistent airflow and noisy operation
- Poor insulation and load distribution, typical in older Nowra homes
- Limited control — old units only allowed room-by-room manual operation

To achieve the family’s goals, we needed a whole-home system designed around Nowra’s coastal climate, insulation levels and room layout.
Strategy & Actions Taken
Full Heat-Load & Room Design Assessment
We calculated heat loads for each room and assessed insulation levels, sun exposure and existing duct routes to determine ideal unit capacity.
System Specification & Selection
A Daikin 14kW ducted system was chosen for its powerful airflow, efficiency and reliable coastal performance.
Custom Zoning for Energy Efficiency
We designed a 4-zone setup:

- Bedrooms
- Main living area
- Kitchen/dining
- Master suite
This allowed independent control, improving both comfort and daily running costs.
Smart Controller Installation
The family received a modern, Wi-Fi enabled wall controller with scheduling, temperature presets and app access.
Clean Installation & Commissioning
- All ducts insulated and sealed
- Return air optimised for noise reduction
- Outdoor unit installed in a shaded position to maximise lifespan
Results
| Measurement | Before | After |
|---|---|---|
| Annual Cooling Cost | ~$2,800 | ~$1,680 |
| Noise Level | Loud | Whisper-quiet |
| Bedroom Temperature | 28–30°C on hot days | Stable 22–24°C |
| Air Consistency | Poor | Uniform throughout home |
Client Feedback
“The difference is incredible. The house cools evenly, much quieter, and our bills are noticeably lower. We wish we had installed this sooner.”
Related Services & Locations
Want Similar Results?
If you’re looking to upgrade your home’s comfort and reduce your energy bills, our Nowra-based team can design the perfect system for your home. Call Denali Air Conditioning today on 0480 170 143 or submit a request for an online quote.
