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Residential Energy Efficiency Assessments

residential energy assessments NaTHERs
An energy rating, or an energy efficiency assessment, is kind of like the Energy Star Rating on your fridge, only it’s for your house. We assess how much energy is used to cool & heat your house to keep it comfortable all year long. We can perform several types of assessments such as a Star Rating (a full thermal calculation), a Deemed-to-Satisfy assessment (a collection of individual minimum requirements), or even a Verification Method assessment (a combination of the other two methods).

Who needs an assessment?

It’s a requirement of the National Construction Code that all new buildings and extensions are energy efficient. If you’re building a new house, town house, apartment complex or if you’re planning an extension of your current home, then you’ll need a certificate that says it complies with the Code.

What’s involved?

The exact process depends on the type of assessment. For a Star Rating we run your house though a computer simulation that calculates the temperature of the air in every room of the entire house for every hour of every day for an entire year. This tells you exactly which rooms will get hotter or colder than others and, if necessary, pinpoints any problem areas that need fixing. We normally use BERS Pro for house star ratings.

A Deemed-to-Satisfy (DTS) assessment involves checking that every individual aspect of the building meets the minimum requirements. This type of assessment is normally cheaper for us to perform but will result in a more expensive building, as there is no option to trade between areas (for example, great insulation won’t offset cheaper glass). To lower your total project costs, we normally only perform a DTS assessment in certain circumstances (for instance, if you have a complying Outdoor Living Area with a Ceiling Fan).

A Reference Building assessment is a combination of the above two methods, where we compare your building’s simulated thermal performance to the thermal performance of a custom-tailored DTS-compliant Reference Building. This type of assessment is much more involved since it’s essentially three assessments in one, so we only recommend this method for houses that fall outside the scope of buildings suitable for the Star Rating or DTS methods (for instance, small transportable homes).

Easy to work with, great turnaround time, and efficient. Look forward to dealing with you more in the future and would recommend your services to other developers/builders.Reed Property Group

What details do we need?

We’ll need a copy of the architectural drawings (site plans, floor plans, elevations, sections) as well as any glazing & lighting schedules if you have them. We also need a completed Check List which contains some extra details that aren’t always on the plans (like proposed insulation, wall & roof colours, floor types, etc.). If you don’t know (or you want us to tell you what you need), just leave those boxes blank & we’ll start with the minimum Code requirements.

How long will it take?

Our turnaround is normally under a week for individual houses and one to two weeks for multi-residential developments. This depends on our current workload and the complexity of your design. Rush/priority jobs are available for an additional investment, contact us if you need a job done urgently before a certain deadline.

How much will it cost?

It’s hard to give a one-size-fits-all estimate because houses can be so varied in their design. Having said that, most of our residential jobs fall between $1-$2 per square metre. We use whatever techniques we can to lower our assessment costs for you, so if you’re building town-houses or units with identical (or even very similar) floor plans the cost can be much lower. Feel free to contact us for a more accurate price for your project.

Why us?

We are a family run business comprised of RPEQs and NatHERS ABSAaccredited members with a fully-certified ISO9001 Quality Management System. Based in Brisbane QLD, we have over fifteen years of direct experience in thermally simulating buildings for Energy Efficiency and we’re confident that we can give you the result your house deserves. We have the reputation, experience, education & systems to deliver our exceptional expertise for your project and we guarantee to always find a Building Solution which includes client-approved, lowest-cost options. We provide quality, reliable consulting advice at a competitive price.

Quality matters in the building industry.

Some organisations have been known in the past to take short-cuts, producing results the building doesn’t deserve. With our extensive accreditation, quality checking & experience you can feel confident we get the right result. Our reports even have tamper-proof holographic seals so you know they’re not copies!

The cost of fixing a building thanks to a junk energy report can be astronomical. Don’t be caught out by a dodgy assessment performed by someone without proper credentials.

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Confused by all the complicated words & jargon in the Energy Efficiency Industry? We've put together a brief explanation of common Energy Efficiency terms.

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