Building Performance Simulation

Better use of daylight and the use of natural ventilation instead of mechanical ventilation or cooling and the adoption of passive solar heating/cooling concepts have become more common in recent times.

BM Energy Consultants are experts at producing building performance simulations.

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What does the Building Performance Simulation do for me?

However arriving at a reliable solution requires amongst other measures, appropriate design, analysis and simulation tools.
Building performance simulation can be used to predict the dynamic response and performance of a building and assess and compare the effects of different design options.

The information thus obtained can help the design team make properly informed judgements about the costs and benefits of different design strategies and options.
BM Energy Consultants can produce building performance simulations ensuring that your building performs effectively and efficiently.

CIBSE TM52 Analysis

The risk of overheating in buildings is becoming more prevalent as changing climates and global energy insecurity make the control of indoor climate increasingly problematic. Overheating occurs in a building either through inappropriate design, poor management or inadequate services. Features of a design that support lower winter heating demand (such as large areas of south facing windows, high levels of insulation, low air permeability rates and low thermal mass) can result in excessively high internal temperatures during summer months.

In response to this increasing level of risk, CIBSE have developed an adaptive methodology to assess the predicted level of thermal comfort within a building. This assessment can be carried out at the detailed design stage by way of Dynamic Simulation Model. CIBSE TM52 sets three criteria for compliance. A building that fails two or more of the criteria is deemed to be at unacceptable risk of overheating:

  • Criterion 1: Hours of Exceedance
  • Criterion 2: Daily Weighted Exceedance
  • Criterion 3: Upper Limit Temperature

Our experienced consultants can guide you smoothly through compliance, from concept to completion. In addition to producing a detailed analysis of your building against the CIBSE TM52 thermal comfort metric, our service includes all the support and advice required to ensure every building achieves a pass.

CIBSE TM59 Analysis

Homes that overheat pose a significant risk to the health and well-being of residents. A trend of higher average outdoor temperatures, coupled with features of modern housing design (such as large areas of south facing windows, high levels of insulation, low air permeability rates and low thermal mass) can result in excessively high internal temperatures during summer months. Situations where this risk is unacceptably high need to be identified as early as possible to allow appropriate changes to be incorporated into the design.

In response to the increasing risk of overheating in dwellings, CIBSE have developed a bespoke methodology to assess the predicted level of thermal comfort within a home: CIBSE TM59. This assessment should be carried out at the detailed design stage by way of Dynamic Simulation Model. For naturally ventilated homes CIBSE TM59 sets two criteria for compliance. A dwelling that fails either of the criteria is deemed to be at unacceptable risk of overheating:

  • Criterion A: Hours of Exceedance (living rooms, kitchens and bedrooms)
  • Criterion B: Night hours above 26 °C (bedrooms only)

For homes that are predominantly mechanically ventilated the CIBSE fixed temperature test must be followed.

Our experienced consultants can guide you smoothly through compliance, from concept to completion. In addition to producing a detailed analysis of your project against the CIBSE TM59 thermal comfort metric, our service includes all the support and advice required to ensure every dwelling achieves a pass.

Daylight Analysis

Natural light is a vital component of a healthy and sustainable built environment. Daylight calculations can help designers to mitigate against the risk of daylight deprivation as well as potentially providing vital credits for BREEAM assessments.

The benefits of natural light

In buildings of all types access to daylight has been shown to have hugely beneficial consequences for our health, happiness and wellbeing.

In healthcare buildings access to daylight has been found to result in quicker recovery, reduced requirements for pain relief and improved levels of mental health. In educational buildings it can result in higher levels of academic achievement, improved behaviour and concentration. In retail establishments, research shows that day lit shops can achieve higher levels of sales.

Artificial lighting can make up the greatest proportion of a buildings energy demand, especially in non-domestic buildings. Provision of daylight can therefore be a key factor in the design of low-energy and sustainable buildings.

Design considerations

Building designers often need to find innovative solutions to balance the provision of adequate daylight against any potential negative impacts associated with glare and solar over-heating. By creating a Dynamic Simulation Model of the building our energy consultants can provide valuable advice to help achieve the best design solution.

** It is the responsibility of the homeowner to apply for and
have the Grant approved prior to any works taking place **

Competent Technical Advisors

BM Energy has 5 Registered Technical Advisors

Download our SEAI Heat Pump Grant Process

We have developed a clear guide on how to apply for the SEAI Heat Pump Grant with Hyperlinks to shorten the process.

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