Team CE

Team CE

Articles written by the Certified Energy technical team covering NatHERS, BASIX and building performance in Australia.

Recent posts by Team CE

18 min read

Documents Needed for a Section J Report

By Team CE on May 26, 2026, 12:17:13 PM

For most commercial building projects, the first step is a practical review of the available drawings, schedules and design information. These documents help the assessor understand the building classification, envelope, glazing, construction systems and relevant building services.

The documentation does not always need to be final before an initial review begins. It does, however, need to be clear enough to identify the building, the proposed work and the likely energy-efficiency compliance pathway.

The more useful question is therefore:

Which documents are needed now, and which details must be confirmed before the Section J Report can be finalised?

Topics: Section J Commercial
6 min read

Climate Responsive Home Design in NSW | Certified Energy

By Team CE on May 25, 2026, 8:14:19 PM

Climate responsive home design considers how a residential building responds to its local climate, seasonal conditions and long-term environmental context.

Topics: NatHERS Energy Efficiency Energy Assessment 7 Star Homes Benefits of 7 Star Homes
25 min read

Design Optimisation and BASIX in NSW | Certified Energy

By Team CE on May 25, 2026, 8:00:15 PM

NSW Residential Compliance Guide

BASIX design optimisation is the process of identifying which project inputs are limiting compliance and refining them without making unnecessary changes to the wider residential design.

 

A project that does not initially achieve its required BASIX outcome does not necessarily need a complete redesign. In many cases, the result can be improved through a targeted review of the assumptions, specifications or design elements affecting the relevant assessment component.

The important first step is diagnosis. Water, energy and thermal comfort respond to different inputs, and a change that improves one part of the assessment may have little effect on another. Repeatedly upgrading unrelated products can increase project cost without resolving the actual constraint.

This guide focuses specifically on how BASIX outcomes can be refined through a structured design process. For the wider assessment, certification and NSW submission pathway, visit the BASIX Knowledge Hub.

Topics: BASIX Residential Compliance
4 min read

BASIX and Shading Design in NSW | Certified Energy

By Team CE on May 25, 2026, 2:27:56 PM

Shading is one of the most important passive thermal strategies within residential architecture.

Topics: NatHERS Energy Efficiency Energy Assessment 7 Star Homes Benefits of 7 Star Homes
4 min read

BASIX and Natural Ventilation in NSW Homes | Certified Energy

By Team CE on May 25, 2026, 2:26:14 PM

Air movement plays a major role in how homes feel thermally throughout the year.

Topics: NatHERS Energy Efficiency Energy Assessment 7 Star Homes Benefits of 7 Star Homes
4 min read

BASIX and Overheating in NSW Homes | Certified Energy

By Team CE on May 25, 2026, 2:24:31 PM

Overheating is becoming one of the defining challenges in residential building performance across Australia.

Topics: NatHERS Energy Efficiency Energy Assessment 7 Star Homes Benefits of 7 Star Homes
21 min read

BASIX and Airtightness in NSW | Certified Energy

By Team CE on May 25, 2026, 2:23:00 PM

NSW Residential Envelope Guide

Airtightness can influence real-world comfort and energy use, but its relationship with BASIX is more specific than simply describing a home as sealed or draught-free.

 

Uncontrolled air leakage can allow conditioned air to escape and external air to enter through gaps, penetrations and construction junctions. This can create draughts, reduce temperature stability and weaken the practical benefit of insulation and efficient heating or cooling systems.

Within a BASIX thermal comfort assessment using NatHERS software, air movement is represented through standardised modelling assumptions and inputs for relevant openings and penetrations. The assessment does not ordinarily measure the completed home’s actual whole-building leakage rate.

This guide explains that distinction. For the wider BASIX targets, documentation and NSW submission pathway, visit the BASIX Knowledge Hub.

Topics: BASIX Residential Compliance
33 min read

BASIX Water Efficiency NSW: Targets and Requirements

By Team CE on May 25, 2026, 2:16:33 PM

The BASIX Water section assesses how a proposed residential development will reduce its demand for potable water compared with the NSW residential benchmark.

The result is influenced by water-efficient fixtures, landscape areas, low-water-use planting, rainwater or other alternative water sources, pools and spas, and any central systems or common areas associated with the development.

A passing water result is not produced by one universal requirement. The appropriate combination depends on the project location, dwelling type, landscape demand, water systems and commitments selected within the assessment.

Topics: BASIX Residential Compliance
4 min read

How Long Does a BASIX Certificate Take in NSW? | Certified Energy

By Team CE on May 25, 2026, 2:14:34 PM

BASIX turnaround time depends on far more than the assessment itself.

Topics: NatHERS Energy Efficiency Energy Assessment 7 Star Homes Benefits of 7 Star Homes
4 min read

BASIX for Sloping Sites in NSW | Certified Energy

By Team CE on May 25, 2026, 2:12:54 PM

Sloping sites create a different type of thermal and architectural condition compared to flat suburban lots.

Topics: NatHERS Energy Efficiency Energy Assessment 7 Star Homes Benefits of 7 Star Homes