Green Star & NABERSNZ

TM Consultants gives you expert experience and technical advice on all your Green Star, NABERSNZ and other rating tools

Energy in buildings and Building
Modelling and Simulation.

As energy costs increase prudency in energy usage is paramount to running an efficient business. All of this is based around good building services design right from the building orientation and the thermal envelope to the actual mechanical, electrical and hydraulic services and just as critically, their control system utilised within the building.

Building Modelling and Simulation

Thermal modelling for integrated design of services and thermal envelope. Through the use of both dynamic and static modelling software, we offer the following design analysis covering residential, commercial, and industrial applications;


  • Overheating risk analysis
  • Solar PV performance design
  • CFD analysis- Energy efficiency analysis
  • HVAC loads analysis
  • Green Star GHG modelling
  • Homestar thermal comfort modelling
  • NZBC H1 Modelling method
  • Wind modelling on macro and micro scale

For existing buildings

We specialise in robust and effective engineering systems that will improve your asset and provide significantly lower energy costs with realistic payback periods. We can assess the systems in place and give options on energy savings. These might include:

  • Installing new/alternative plant Especially for domestic hot water heating in high use applications (e.g. adding a large heat pump to the existing boiler setup in a hotel)
  • Alterations to the way the building is managed
  • Changes to plant room configurations For when the current setup is not ideal
  • Reviewing and improving power and gas supplies, their tariffs and setups

For new buildings

We specialise in robust and effective engineering systems that will improve your asset and provide significantly lower energy costs with realistic payback periods. We can assess the systems in place and give options on energy savings. These might include:

Providing options for space and water, heating and cooling, ventilation, controls and electrical

Including the pros and cons, capital and running costs, EECA funding and payback period comparisons of each option.

This allows you to make an informed decision resulting in no nasty surprises.

Designing these systems for optimal layouts and efficient use of space

Part of this includes 3D modelling using Revit and ArchiCAD.

This gives you a huge advantage as we are modelling within the architect’s actual model.

We are proficient in energy, and prudent in striking the right balance in efficient systems versus capital outlay considerations for the client.

Our team members have designed for the highest Green Star rated (6 star) building in NZ — the Christchurch City Council Civic Building.

We have many firsts including NZ's first NABERSNZ whole building rating, NZ's highest NABERSNZ rating, NZ's first certified carboNZero building, NZ's first Green Star church - many of which have won awards.

When will you benefit by involving us?

At the outset of a new project

The importance of spatial planning on a site is often lost with respect to services by architects and planners which can restrict your plant options. Large heat pumps and boilers really need to be included in the resource consent application for a new building as urban design panels have a major influence on what can be placed where and again, their uninformed decisions can lead to major cost implications further down the project.

  • When you need objective, independent and expert advice on options available
  • When the existing system requires a review
  • At any time where running costs are important
  • When there is an issue with the existing plant that will require capital expenditure to repair/recondition it
  • At any time where maintenance costs are important
  • When major plant is nearing the end of its economic life