LLumar® Window Film Can Help With the Energy Savings

Specifying LLumar® window film as part of an Energy Savings Opportunity Scheme audit can help to save money (payback typically in less than five years, comparable to technologies such as LED lighting) and can help to meet requirements to consider materials with low lifecycle costs.

This document sets out how window film can be considered by those undertaking audits as part of the Energy Savings Opportunity Scheme [2] (ESOS), which was predicted by The (then) Department of Energy & Climate Change (DECC) [3] in its impact assessment to lead to 1.6bn net benefits to the UK, the majority of which will be directly felt by businesses as a result of energy savings [4].

LLumar window film is manufactured by Eastman Performance Films, LLC. The Company has sought out the expertise and knowledge of an energy consultant5 to gain evidence on how window film can help in an ESOS context. Andrew Cooper is a director at EVORA EDGE, the engineering division of EVORA GLOBAL. He is an Incorporated Engineer, a MEI Chartered Energy
Manager and a CIBSE Low Carbon Consultant and Energy Assessor to Level 5 (the highest level of accreditation). Andrew is recognized as an expert in his field: he sits on several advisory panels and writes for several trade and technical journals on energy and sustainability.


About ESOS

ESOS is the UK Government’s approach to implementing Article 8 of the EU Energy Efficiency Directive. The scheme has been implemented in phases, there are four phases – each lasting for four years, and we are now in Phase Two. The first phase covered the period 17 July 2014 to 5 December 20156. The second phase covers the period 6 December 2015 to 5 December 2019. The qualification date for the second phase is 31 December 2018.

ESOS covers energy consumed by buildings, processes and transport and is a mandatory energy assessment and energy savings identification scheme for large enterprises operating in the UK. Organizations affected by ESOS will need to demonstrate compliance with the scheme: if you are a large enterprise you must participate in ESOS and notify the Environment Agency you are ESOS compliant by 5 December 2019, or face fines.

The scheme applies to any UK undertaking that meets either one or both of the following conditions:

  • It employs 250 or more people
  • It has annual turnover of more than 50 million euro (£38,937,777) and an annual balance sheet total in excess of
  • 43 million euro (£33,486,489)

The conversion rate for euro to sterling for Phase One was set on 31 December 2014. We understand that the conversion rate for Phase Two will be reviewed and adjusted on 31 December 2018.

If a corporate group contains at least one UK undertaking which meets the qualification conditions, its entire UK operation must take part in ESOS. The highest UK parent will be responsible for ensuring the group as a whole complies by reporting on its total UK energy use.


Why specify window film?

Retrofitting window film can help to extend the life of existing window systems at a fraction of the cost of installing new, high-performance double glazing. Window film can help to save energy, reduce carbon emissions, improve comfort and staff productivity. It can also bring about other savings such as reduced energy loads for HVAC plant sizing. This helps reduce capital and operational costs (of plant) and helps free up valuable building space for other purposes.


Benefits of LLumar window film

LLumar window film upgrades standard glazing to provide:

  • Energy efficiency: Resulting in energy savings on heating and cooling
  • Solar protection: up to 80%* rejection of summer heat gain
  • Glare reduction: up to 90%* reduction in glare
  • UV protection glazing: up to 99%* UV protection
  • Safety and protection: Impact protection, resistance to manual attack, blast mitigation, anti-graffiti
  • Improved occupant comfort resulting from lower room temperatures
  • Optimized working conditions


How does LLumar window film work?

LLumar window films help reduce heat loss in the winter and solar gain in the summer. A wide variety of films are available, ranging
from clear products to those that provide our best heat and glare rejection.
The following illustrations show how LLumar technologies work:







Typical Film Structure

Reflective Films

  • Release liner
  • Adhesive with UV absorbers
  • Clear or tinted polyester with UV absorbers
  • Metallised aluminium
  • Clear polyester
  • Scratch-resistant coating


What can window film achieve?

The table below outlines typical installation costs and payback periods for our leading films for a building with air conditioning.


Item Film Type Typical Installed Costs (per m2) Typical Simple Payback (years)
1 High Performance £25 2-5
2 High Light Transmission £60 9



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