PRACTICAL CHURCH ENERGY ISSUES Rebecca Cadie, Architect ARPL - PowerPoint PPT Presentation

PRACTICAL CHURCH ENERGY ISSUES Rebecca Cadie, Architect ARPL Architects

PRACTICAL APPLICATION OF SUSTAINABLE DESIGN IN CHURCHES - all shapes, sizes and ages

PRACTICAL APPLICATION OF SUSTAINABLE DESIGN IN CHURCHES - with all manner of halls and church housing

FIRST STEP - Understand how and when you use energy CHURCH HALL RECTORY / MANSE Heating Heating Heating Lighting Lighting Lighting Limited Hot water Hot water Power Power Regular Intermittent Varied use Every day use

What can be done to make a church more environmentally efficient Reduce energy consumption Improve comfort levels Generate energy efficiently and responsibly Possible steps to sustainability

REDUCTION IN ENERGY USE Improve insulation levels - much easier with halls and houses Roof insulation - fully insulate attics 400 mm where possible External wall insulation -cavity wall and external insulation possible with 20th century buildings Under floor insulation -Suspend under timber floors -Combine in new ground slab

Church Roof insulation

Church Roof insulation limitations

Insulation and Ventilation Risks: trapped moisture and condensation

Windows Repair stained and leaded glass Protection Installation Replacement

REDUCTION IN ENERGY USE Improve heating & comfort Challenges: Volume of building Pews and furnishing Available energy source Cost of installations Efficiency of use

EFFICIENT ENERGY USE Spatial heating Zoning controls management of space STAGE 2 - UPPER LEVEL

Comfort and flexibility

Lighting Low energy fittings & LED lamps Controls Location of fittings Safe lamp replacement

How can sustainable improvements help - a notional parish Church Halls Rectory Draught proofing Insulation roof and walls Insulation roof and walls Front door protection Upgrade windows Upgrade windows Maintain windows Efficient hot water insulate hot water storage Insulate congregation Timers and controls Timers and controls Background heat with local heat System insulation Solar PV boost Lighting efficiency Solar water heating Timers and controls Solar PV System insulation Lighting efficiency

Upgrade existing Improved heating output Improved Controls LED lamps in existing fittings

New Sustainable Technology Biomass boiler - burns wood chip or wood pellets Supplies steady heat not so good if only intermittent use Large boiler room needed Delivery space for lorry access and fuel store Expensive to install Supply contract and quality of fuel Could serve group of buildings Suited to underfloor or lower temperature

Heat Pumps Ground source -bore hole ground coil -or water based

Heat pumps- air source Electrical power at 250 - 350% efficient Cost equivalent of gas Air to water heat transfer Two main types -Outside air or exhaust air Tariffs are critical Output specification critical

Solar Electricity Best use if electricity consumption during day but still benefits from FITS Need not be mounted on church to gain most benefits Requires panels on roof and additional electrical system alterations Panels can be flat and have been accepted on Listed buildings when discrete

Low Cost Effective changes Low energy fittings & LED lamps Controls and thermostats Modfication for efficient heating

How can sustainable improvements help You may not be able to reduce heat loss in the church by much but Comfort levels can be improved Other efficiency savings can be made and Significant improvements can be made in non historic buildings