National Trust energy approaches

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,000Mwh pa National Trust (Wales) energy targets

Why is a mansion like a cow? PUT PUT PUT

The EPC story

Experience in energy

What’s happening?

Maintain

Identify opportunities and prioritise – Plan of Attack

Where were we starting from? ,000ltrs of oil pa 1500ltrs pd in winter 1,200,000Kwh pa 300,000kwh of electricity

Site audit Specialist survey Maintenance contract Optimisation BMS strategy Overhaul boiler Dynamic heat loss model Hand dryer trial Full biomass feasibility Heat pump pre feasibility Roof insulation Staff training Flange insulation Low heat dynamic model Detailed M&E assessment and room by room heat loss Heat pump full feasibility Secondary glazing Hand dryer rollout LED lighting 50kw PV instillation Smart metering Heat pump design and EIA Sub metering, meter monitoring Hydro pre feasibility Staff training Site re audit New heat main and zonal design Conservation LED lighting Marine source heat pump instillation Wind turbine feasibility New heat main Localised solar thermal Improving shutters and curtains Visitor centre heating - ASHP Fabric insulation – tea room Typical property energy approach – Plas Newydd 2011

Focusing on the basics can yield big results

Show and tell - typical old house

Windows – Do they shut properly? – Does the window frame fit? – How loose are the sashes? – Are curtains used? – Are they lined? – Shutters – Secondary glazing – Changing to double glazed panels?

Insulation – is it that simple? Roof, wall, floor, door…? Access? Fire and Insurance Insects and durability Ease of future access Cost Sustainability Freezing pipes Electrical cables? Condensation Oh yes and ‘What’s it like for vacuuming bat poo off’? Yes it is… ish?

9kw high heat CO2 air source heat pumps currently on trial. Options for viable, low energy heating and hot water technology to replace the many thousands of oil based heating systems the NT have across their estate. Ability to retrofit on to the existing heating system. Voltage optimisation Air-to-air heat pump Replaces storage heaters Cheap to install

First Lower the load. Then work out how much you need

Lessons

– Appropriateness and compromise

Training and commitment

300kw of Photovoltaics (PV)

Detailing

Sharing is key