Monthly Archives: There is no doubt that significant direct energy savings are achieved using smart lighting solutions with intelligent light fixtures. However, there are also indirect energy savings. For example dimmed lights will generate less heat reducing cooling loads on HVAC plant. So are there any studies that have evidenced such and what are the indicative numbers? I recently asked this question on one of my LinkedIN threads and here are the best of the replies:

Indirect heating and cooling load impact, here are some links that might help ... http://www.lightsearch.com/resources/lightguides/hvac.html http://www.csemag.com/single-article/integration-lighting-and-hvac-systems/6cdbfda10abe16e4770416fd60235987.html p23 and following of http://isites.harvard.edu/fs/docs/icb.topic1136043.files/07%20ASHRAE%20Standard%2090.1-2010.pdf

This link takes you to an on-line calculator, which claims to determine anticipated heating load from a given lighting deployment, http://liacs.omslighting.com/

Additional comments were as follows:

Unless a software is used (like is nowadays mandatory in many parts of the world) to do a real calculation a rule of thumb is to count with 5% extra savings due to reduction of needed HVAC when using controls relative to not using controls (in new construction, usually the lighting upgrade itself will cut away the biggest heat load by using more efficient sources and fixtures in renovations).

It is also suggested that the heat introduced into your space by lighting is the plug power times the usage time(if undimmed) = conservation of energy, even the light emitted will be converted to heat eventually !!! Unless of course you have ventilation and especially if you have air extraction over the luminaires ... a good luminaire supplier will be able to give you data on their luminaires about noise, pressure drop and heat load reduction as a function of air flow ...

March 2014

Impact of intelligent lighting control on heating & cooling costs?

There is no doubt that significant direct energy savings are achieved using smart lighting solutions with intelligent light fixtures. However, there are also indirect energy savings. For example dimmed lights will generate less heat reducing cooling loads on HVAC plant. So are there any studies that have evidenced such and what are the indicative numbers?

I recently asked this question on one of my LinkedIN threads and here are the best of the replies:

Indirect heating and cooling load impact, here are some links that might help …
http://www.lightsearch.com/resources/lightguides/hvac.html
http://www.csemag.com/single-article/integration-lighting-and-hvac-systems/6cdbfda10abe16e4770416fd60235987.html p23 and following of http://isites.harvard.edu/fs/docs/icb.topic1136043.files/07%20ASHRAE%20Standard%2090.1-2010.pdf

This link takes you to an on-line calculator, which claims to determine anticipated heating load from a given lighting deployment, http://liacs.omslighting.com/

Additional comments were as follows:

Unless a software is used (like is nowadays mandatory in many parts of the world) to do a real calculation a rule of thumb is to count with 5% extra savings due to reduction of needed HVAC when using controls relative to not using controls (in new construction, usually the lighting upgrade itself will cut away the biggest heat load by using more efficient sources and fixtures in renovations).

It is also suggested that the heat introduced into your space by lighting is the plug power times the usage time(if undimmed) = conservation of energy, even the light emitted will be converted to heat eventually !!! Unless of course you have ventilation and especially if you have air extraction over the luminaires … a good luminaire supplier will be able to give you data on their luminaires about noise, pressure drop and heat load reduction as a function of air flow …

Need energy efficient lighting advice?

This report by the Carbon Trust provides a great overview on how to reduce lighting costs. Read more

Pushing the Envelope – Building analytics beyond HVAC

Over the recent past, the best use of an analytic software application for building systems has been fault detection and diagnostics (FDD) specific to HVAC systems. There is research and a number of case studies with verified results showing analytic software reduces energy consumption, improves the efficiency and effectiveness of building operation, and reduces building OPEX. Once used, FDD becomes a core operational tool for many facility managers.
Read more here.

The Niagara Framework combines with elitedali™ to bring innovation to lighting control in landmark SA project

The new Standard Bank office in the Rosebank business area of Johannesburg, South Africa, known as 30 Baker Street, is using technology based on the Niagara Framework® in an innovative approach to lighting control.
The Standard Bank office was designed to be highly efficient and low carbon. It has been awarded a 5-Star Greenstar Design Rating by the Green Building Council of South Africa – putting it into the top ten of the country’s most sustainable buildings. The 65,000m2 office development has a nine-storey east wing and an eleven-storey west wing joined by a central atrium. The building will house 5,000 Standard Bank staff.
Read more here.

cns-enocean Universal Switch Insert (EMEA region)

These maintenance-free, energy harvesting wireless switches revolutionise building engineering, enabling flexibility impossible with fixed wiring.
EnOcean radio switches, produce their energy from every press of the switch; they need no batteries and are maintenance-free.
This product is directly commissioned from Niagara using the cns-enocean Connectivity Kit
Download the latest datasheet

cns-enocean Universal Switch Insert (North America region)

These maintenance-free wireless switches revolutionise building engineering, enabling levels of flexibility impossible with fixed wiring.
EnOcean radio switches, produce energy from every press of the switch; they need no batteries and are maintenance-free.
This product is directly commissioned from Niagara using the cns-enocean Connectivity Kit
Download the latest datasheet