Guide to Long Term Building EfficiencyPresented by:

Energy efficient design

• Think beyond design and handover

• Part L 2010 – and beyond

• Tighter targets on carbon performance

• But there is a longer term challenge

Existing buildings, new targets

• Government aims to reduce UK carbon emissions by 80%

• Built environment a key part of this target

• Impossible to achieve with new-build alone

• 60% of 2050 commercial floor space was already built in 2010

Long term energy performance

• Refurbishment and long-term efficient operation are crucial

• Building owners and operators need to pay close attention

• Benefits are reduced carbon emissions and lower energy costs

Long term energy performance

How the figures add up:

•About 40% of a building’s operational costs are related to energy

•Around 80% of the total costs of a building occur during its operation

•Half of those are energy-related

•Only around 20% of costs during the design and construction phase

The good news

• The advantage is that users and owners have control over operational costs

• Energy is one of the most controllable overheads

• Several important areas of energy usage: • Heating• Hot water production• Lighting• Cooling and ventilation• Auxiliary energy (eg for PCs and other

office equipment)

Step-by-step efficiency

Achieving long-term efficiency means examining all these areas:

1.First step – find out where energy is being used

2.Metering and sub-metering

3.Measure, monitor and then manage

Quick wins are possible

Three main opportunities to save energy:

1.Better control (turn down or switch off when necessary)

2.Good maintenance

3.Refurbishment or replacement

Quick wins are possible

Quick wins for early payback:

• Get control of your controls – avoid energy drift

• Meter and measure

• A walk-around check pays dividends in energy saving• Sensors – working and correct positioning? • Manual overrides – are they off? • Check timers – are they set to match office hours?

Make the most of your control system

Understand the capabilities of your control system:

• More equipment supplied with advanced built-in controls

• Air conditioning can be linked to lighting

• Seven-day time clocks included

• Make sure the FM team knows what can be achieved

Maintaining savings

• Good maintenance will save money in the long-term

• Energy consumption of an air conditioning system can increase 60% without regular maintenance

• Cutting maintenance is a false economy

• Start with simple checks

• Comply with legal requirements on air conditioning system checks

• Reduce heating by a few degrees – but talk to occupants first

Quick wins – low and no-cost ideas

• Set time clocks to match building use

• Limit set-points on air conditioning (21oC and 23oC)

• Lock controllers

• Ensure lighting is off at night

• Get staff buy-in for energy saving measures – this can greatly increase your success in reducing energy waste

Long-term energy management is a virtuous circle

New technologies

• Refurbishment and replacement –

next steps

• Once savings with existing equipment have been optimised

• Replacing older technology may be a useful option to consider

Energy-savings options

Heat recovery technology:

• Substantial savings

• Recovers ‘waste’ heating or cooling energy

• Applies it to incoming air

• Reduces the need for mechanical heating and cooling

Automatic waste reduction

Consider technologies that prevent waste automatically:

•Window controls that shut down air conditioning automatically

•Prevents running of heating/cooling with open windows

•Particularly useful in the hotel sector

New system, new energy savings

Replacing older air conditioning systems:

•Modern equipment is substantially more energy efficient

•Can see 45–50% energy savings against ten-year-old equipment

•Existing pipework and wiring may be used in some cases

Replacement

Other reasons for new air conditioning systems:

• New rules on use of R22 – phase out of virgin refrigerant

• Complete ban on all HCFC by January 2015

• Price of R22 already rising as supplies of recycled R22 diminish

Replacement

Substantial savings can be made by replacement of old air conditioning:

•HSBC bank invested £16 million on new equipment at 800 branches

•Other technologies such as heat recovery and new controls

•Halved energy bills at branches

•Saved over £2 million a year on energy costs

Thinking of renewables?

• Heat pumps offer a useful solution for commercial buildings

• Low carbon solutions

• Lower energy use on heating which accounts for half of energy used

• 1kW of electrical energy input = 3.2kW heat produced

• Commercial solutions now available

Thank you

We now invite you to ask any questions.

Meeting Rooms / Offices

What's the solution?

An advanced, backlit touchscreen controller with built in occupancy sensor and 7 day time clock

The new MNET controller

PAR-U02MEDA

PAR-U02MEDA

Built in occupancy and

brightness sensors

LED colour indication

Full backlit

touchscreen display

Further advanced features

available through menu

PAR-U02MEDA

Energy-save control will be performed when the occupancy sensor detects vacancy

When the occupancy sensor detects no human movement for a certain period of time, this will be regarded as the vacancy

PAR-U02MEDA

The LED indicator shows the operation status by lighting (and blinking) with different colours and

brightness or by turning off

Indicator colours: Blue, Light blue, Purple, Red, Pink, Orange, Yellow, Green, Lime, and White

PAR-U02MEDA

The night setback function starts heating operation when the

unit is off and the room temperature drops below a set

temperature

This also works reversely, cooling when the room gets above

a set temperature

Saving energy use, costs and CO2 emissions

PAR-U02MEDA

Auto-OFF timer allows the user to set a timer to turn off the indoor unit after the specified time has elapsed

Good for meeting rooms or areas with infrequent use

Also has built in 7 day time clock for full flexibility

PAR-U02MEDA