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 Heating Lighting Regular Intermittent HALL Heating Lighting Limited Hot water Power Varied use RECTORY / MANSE Heating Lighting Hot water Power 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

STAGE 2 - UPPER LEVEL

EFFICIENT ENERGY USE Spatial heating

Zoning controls management of space

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

Draught proofing Front door protection Maintain windows Insulate congregation Background heat with local heat boost Timers and controls System insulation Lighting efficiency

Halls

Insulation roof and walls Upgrade windows Efficient hot water Timers and controls System insulation Lighting efficiency Solar PV

Rectory

Insulation roof and walls Upgrade windows insulate hot water storage Timers and controls Solar PV Solar water heating

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 Significant improvements can be made in non historic buildings Other efficiency savings can be made and