ASHRAE 189.1: Complete Guide to Standard for the Design of High-Performance Green Buildings

ASHRAE Standard 189.1 provides minimum requirements for the design, construction, and operation of high-performance green buildings. This standard addresses site sustainability, water use efficiency, energy efficiency, indoor environmental quality, and the building's impact on the atmosphere, materials, and resources. Understanding ASHRAE 189.1 is essential for green building design, LEED certification, and sustainable construction.

The standard provides mandatory requirements and optional performance enhancements across multiple categories. It integrates with ASHRAE 90.1, 62.1, and 55 while establishing higher performance thresholds. This comprehensive guide covers all major sections, requirements, and practical applications.

Introduction to ASHRAE 189.1

Purpose and Scope

ASHRAE Standard 189.1 serves multiple functions:

Sustainability:

High-performance building design
Environmental protection
Resource conservation
Climate change mitigation

Code Compliance:

Green building code basis
LEED alternative
Certification programs
Regulatory requirements

Design Guidance:

Integrated design approach
Performance optimization
Best practices
Innovation

Scope

Applies to:

New buildings
Major renovations
Additions
All building types

Site Sustainability

Site Selection

Requirements:

Avoid sensitive sites
Minimize environmental impact
Preserve natural features
Protect water resources

Prohibited Sites:

Site Type	Restriction	Notes
Prime farmland	Avoid	Agricultural preservation
Floodplains	Restrict	100-year flood zone
Wetlands	Avoid	Environmental protection
Endangered species habitat	Avoid	Wildlife protection
Public parkland	Avoid	Public space preservation

Site Development Requirements:

Requirement	Standard	Enhanced	Notes
Site disturbance	Minimize	< 40% of site	Preserve natural areas
Native vegetation	Maintain	> 50% native	Biodiversity
Impervious surfaces	Limit	< 50% of site	Stormwater management

Heat Island Reduction

Requirements:

Reflective surfaces
Vegetated roofs
Shading
Cool materials

Solar Reflectance Index (SRI) Requirements:

Surface Type	Minimum SRI	Enhanced SRI	Notes
Roof (low-slope)	78	90	Cool roof
Roof (steep-slope)	29	39	Reflective
Paved surfaces	29	39	Cool paving
Non-roof surfaces	29	39	Reflective materials

SRI Calculation:

SRI = \frac{123.97 - 141.35 \times \alpha + 9.655 \times \alpha^2}{1 - \alpha}

Where $\alpha$ = Solar absorptance

Typical SRI Values:

Material	SRI	Notes
White membrane	100-110	High reflectance
Light gray	60-80	Moderate
Dark gray	20-40	Low
Black	0-10	Very low
Vegetated roof	70-90	Natural cooling

Vegetated Roof Requirements:

Coverage	Minimum	Enhanced	Benefits
Roof area	50%	75%	Heat island reduction
Plant coverage	80%	90%	Evapotranspiration
Soil depth	100 mm	150 mm	Thermal mass

Shading Requirements:

Element	Coverage	Notes
Parking areas	50%	Shade within 10 years
Walkways	30%	Pedestrian comfort
Building surfaces	30%	Solar gain reduction

Light Pollution Reduction

Requirements:

Exterior lighting limits
Shielding requirements
Controls
Dark sky compliance

Lighting Power Limits:

Application	Maximum Power (W)	Notes
Building facade	0.5 W/ft²	5.4 W/m²
Parking areas	0.15 W/ft²	1.6 W/m²
Walkways	0.1 W/ft²	1.1 W/m²
Landscaping	0.05 W/ft²	0.5 W/m²

Shielding Requirements:

Light Type	Shielding	Notes
Uplighting	Full cutoff	No light above horizontal
Downlighting	Full cutoff	No light above 90°
Accent lighting	Full cutoff	Controlled beam

Control Requirements:

Automatic shutoff after hours
Occupancy sensors
Time switches
Dimming controls

Water Use Efficiency

Indoor Water Use

Requirements:

Low-flow fixtures
Water-efficient appliances
Metering
Reduction targets

Fixture Flow Rates:

Fixture Type	Maximum Flow	Enhanced	Notes
Toilets	1.28 gpf (4.8 Lpf)	1.0 gpf (3.8 Lpf)	Dual flush preferred
Urinals	0.5 gpf (1.9 Lpf)	0.125 gpf (0.5 Lpf)	Waterless option
Lavatory faucets	1.5 gpm (5.7 Lpm)	1.0 gpm (3.8 Lpm)	Aerators required
Kitchen faucets	2.2 gpm (8.3 Lpm)	1.5 gpm (5.7 Lpm)	Standard
Showerheads	2.0 gpm (7.6 Lpm)	1.5 gpm (5.7 Lpm)	Low-flow heads
Pre-rinse spray	1.6 gpm (6.1 Lpm)	1.0 gpm (3.8 Lpm)	Commercial

Water Use Calculation:

V_{daily} = \sum_{i=1}^{n} (N_i \times F_i \times U_i)

Where:

$V_{daily}$ = Daily water use (L/day)
$N_i$ = Number of fixtures type $i$
$F_i$ = Flow rate (L/use)
$U_i$ = Uses per day

Typical Water Use:

Building Type	Water Use (L/person·day)	Water Use (gal/person·day)	Notes
Office	40-60	10-15	Standard fixtures
Office (enhanced)	25-40	6-10	Low-flow fixtures
Retail	30-50	8-13	Public restrooms
Restaurant	80-120	21-32	Kitchen + restrooms
Hotel	200-300	53-79	Guest rooms

Water Reduction Targets:

Building Type	Baseline Reduction	Enhanced Reduction	Notes
Office	20%	30%	vs. code baseline
Retail	20%	30%	vs. code baseline
Restaurant	15%	25%	vs. code baseline
Hotel	20%	30%	vs. code baseline

Outdoor Water Use

Requirements:

Native plants
Efficient irrigation
Rainwater harvesting
Graywater use

Irrigation Requirements:

System Type	Efficiency	Notes
Drip irrigation	90-95%	High efficiency
Sprinkler (rotor)	70-80%	Moderate efficiency
Sprinkler (spray)	60-70%	Lower efficiency
Manual	50-60%	Variable

Water Budget Calculation:

WB = (0.62 \times E_{to} \times LA \times 0.8) - (0.62 \times P \times LA)

Where:

$WB$ = Water budget (gal/year)
$E_{to}$ = Evapotranspiration (in./year)
$LA$ = Landscape area (ft²)
$P$ = Effective precipitation (in./year)
0.8 = Plant factor

Native Plant Requirements:

Coverage	Minimum	Enhanced	Benefits
Native plants	50%	75%	Reduced irrigation
Drought-tolerant	80%	100%	Water conservation
Invasive species	0%	0%	Biodiversity

Rainwater Harvesting:

Collection Potential:

V_{rain} = A_{roof} \times P \times C \times \eta

Where:

$V_{rain}$ = Rainwater volume (L/year)
$A_{roof}$ = Roof area (m²)
$P$ = Annual precipitation (mm)
$C$ = Runoff coefficient (0.8-0.9)
$\eta$ = Collection efficiency (0.8-0.9)

Storage Sizing:

V_{storage} = V_{daily} \times D_{dry}

Where:

$V_{storage}$ = Storage volume (L)
$V_{daily}$ = Daily demand (L/day)
$D_{dry}$ = Dry period (days, typically 7-14)

Water Metering

Requirements:

Submetering
Leak detection
Monitoring
Reporting

Metering Requirements:

System	Metering Level	Notes
Building	Main meter	Total consumption
Tenant	Submetering	Multi-tenant buildings
Irrigation	Separate meter	Outdoor use
Cooling tower	Separate meter	Makeup water
Process water	Separate meter	Special uses

Leak Detection:

System	Detection Method	Threshold	Notes
Continuous flow	Flow monitoring	> 0.1 gpm	24/7 monitoring
Unusual consumption	Usage patterns	> 20% increase	Alert system
Pressure monitoring	Pressure drop	> 10%	System leaks

Energy Efficiency

Energy Performance

Requirements:

Exceed ASHRAE 90.1 by 30%
Or demonstrate equivalent performance
Renewable energy options
On-site generation

Energy Performance Targets:

Building Type	Baseline (kWh/m²·a)	Target (kWh/m²·a)	Reduction	Notes
Office	150-200	105-140	30%	ASHRAE 90.1 baseline
Retail	200-250	140-175	30%	ASHRAE 90.1 baseline
School	120-150	84-105	30%	ASHRAE 90.1 baseline
Hotel	180-220	126-154	30%	ASHRAE 90.1 baseline

Performance Calculation:

EPI = \frac{E_{annual}}{A_{floor}}

Where:

$EPI$ = Energy Performance Indicator (kWh/m²·a)
$E_{annual}$ = Annual energy consumption (kWh)
$A_{floor}$ = Floor area (m²)

Compliance Options:

Option	Requirement	Notes
Prescriptive	Meet all requirements	Standard path
Performance	30% better than baseline	Energy modeling
Renewable	On-site generation	5% of energy
Combination	Multiple strategies	Flexible approach

HVAC Systems

Enhanced Requirements:

Higher efficiency equipment
Advanced controls
Energy recovery
Optimized operation

Equipment Efficiency Requirements:

Equipment Type	ASHRAE 90.1 Minimum	ASHRAE 189.1 Minimum	Enhancement
Chiller (water-cooled)	COP 5.5	COP 6.0	+9%
Chiller (air-cooled)	COP 2.55	COP 2.8	+10%
Boiler (gas)	80%	85%	+5%
Heat pump (air-source)	COP 3.2	COP 3.5	+9%
Heat pump (water-source)	COP 4.2	COP 4.5	+7%

Energy Recovery Requirements:

Application	Minimum Efficiency	Notes
Ventilation (sensible)	60%	Heat recovery
Ventilation (total)	50%	Energy recovery
Exhaust air	50%	Waste heat recovery

Control Requirements:

Control Type	Requirement	Notes
Economizer	Required	Air or water
Demand control ventilation	Required	CO₂-based
Optimal start/stop	Required	Predictive
Load reset	Required	Supply temperature

System Optimization:

E_{savings} = E_{baseline} \times (1 - \eta_{improvement})

Where $\eta_{improvement}$ = Efficiency improvement factor

Typical Savings:

Improvement	Energy Savings	Notes
High-efficiency equipment	10-15%	vs. minimum
Advanced controls	15-25%	vs. basic
Energy recovery	20-40%	Ventilation energy
System optimization	10-20%	Operational

Lighting

Enhanced Requirements:

Lower lighting power density
Advanced controls
Daylight integration
Task lighting

Lighting Power Density Limits:

Space Type	ASHRAE 90.1 (W/m²)	ASHRAE 189.1 (W/m²)	Reduction
Office	9.7	7.3	25%
Conference room	11.8	8.9	25%
Classroom	12.9	9.7	25%
Retail	16.1	12.1	25%
Corridor	5.4	4.1	25%

Control Requirements:

Control Type	Requirement	Notes
Automatic shutoff	Required	All spaces
Occupancy sensors	Required	Enclosed spaces
Daylight controls	Required	Daylit zones
Time switches	Required	Scheduled spaces

Daylight Requirements:

Space Type	Minimum Daylight	Enhanced	Notes
Office	25% of floor area	50%	Daylight factor ≥ 2%
Classroom	25% of floor area	50%	Daylight factor ≥ 2%
Retail	10% of floor area	25%	Daylight factor ≥ 1%

Daylight Factor Calculation:

DF = \frac{E_{internal}}{E_{external}} \times 100\%

Where:

$DF$ = Daylight factor (%)
$E_{internal}$ = Internal illuminance (lux)
$E_{external}$ = External horizontal illuminance (lux)

Indoor Environmental Quality

Ventilation

Requirements:

ASHRAE 62.1 compliance
Enhanced ventilation options
Outdoor air quality
Monitoring

Ventilation Enhancement Options:

Option	Enhancement	Notes
Increased outdoor air	30% above minimum	Better IAQ
Filtration	MERV 13+	Enhanced filtration
Monitoring	CO₂ sensors	Demand control
Natural ventilation	Operable windows	Mixed-mode

Outdoor Air Quality Requirements:

Contaminant	Maximum (μg/m³)	Treatment	Notes
PM2.5	35 (24-hr)	Filtration MERV 13+	Enhanced
PM10	150 (24-hr)	Filtration MERV 8+	Standard
Ozone	0.12 ppm (1-hr)	Filtration/adsorption	Enhanced

Monitoring Requirements:

Parameter	Monitoring	Frequency	Notes
CO₂	Continuous	Real-time	Demand control
Outdoor air flow	Continuous	Real-time	System verification
Filter status	Continuous	Real-time	Maintenance alert

Thermal Comfort

Requirements:

ASHRAE 55 compliance
Individual control
Monitoring
Documentation

Individual Control Requirements:

Space Type	Control Type	Coverage	Notes
Private office	Individual	100%	Full control
Open office	Local	50%	Zone control
Conference room	Zone	Per room	Room control
Common areas	Zone	Per zone	Area control

Temperature Control Range:

Season	Setpoint Range (°C)	Setpoint Range (°F)	Notes
Heating	20-24	68-75	Individual adjustment
Cooling	23-27	73-81	Individual adjustment
Deadband	2-3	3.6-5.4	Energy savings

Monitoring Requirements:

Parameter	Monitoring	Frequency	Notes
Temperature	Continuous	Hourly	Comfort tracking
Humidity	Continuous	Hourly	Comfort tracking
Occupant satisfaction	Periodic	Quarterly	Survey

Acoustic Performance

Requirements:

Sound transmission
Background noise
Speech privacy
Performance criteria

Sound Transmission Class (STC) Requirements:

Space Type	Minimum STC	Enhanced STC	Notes
Office to office	45	50	Privacy
Office to corridor	40	45	Noise control
Conference room	50	55	Confidentiality
Mechanical room	60	65	Noise isolation

Background Noise Requirements:

Space Type	Maximum NC	Maximum dBA	Notes
Private office	35	40	Quiet
Open office	40	45	Moderate
Conference room	30	35	Very quiet
Corridor	45	50	Acceptable

Speech Privacy:

Privacy Level	Privacy Index (PI)	Notes
Confidential	≥ 95	High privacy
Normal	80-95	Standard privacy
Minimal	60-80	Low privacy

Lighting Quality

Requirements:

Daylight access
Glare control
Color rendering
Visual comfort

Daylight Access Requirements:

Space Type	Minimum Coverage	Enhanced Coverage	Notes
Office	25% of floor	50% of floor	Daylight factor ≥ 2%
Classroom	25% of floor	50% of floor	Daylight factor ≥ 2%
Common areas	10% of floor	25% of floor	Daylight factor ≥ 1%

Glare Control:

Control Method	Requirement	Notes
Shading devices	Required	Manual or automatic
Glare index	< 19	Daylight glare probability
Window treatments	Required	Blinds, shades

Color Rendering Index (CRI):

Application	Minimum CRI	Enhanced CRI	Notes
General lighting	80	90	Color accuracy
Task lighting	90	95	High color quality
Display lighting	90	95	Visual quality

Illuminance Requirements:

Space Type	Minimum (lux)	Recommended (lux)	Notes
Office (general)	300	500	Task lighting
Office (task)	500	750	Work surface
Conference room	300	500	General
Corridor	100	200	Circulation

Building Impact on Atmosphere

Ozone Depletion

Requirements:

Refrigerant selection
Low ODP refrigerants
Leak prevention
Recovery

ODP Requirements:

Refrigerant Type	Maximum ODP	Prohibited	Notes
New systems	0	ODP > 0	No ozone depletion
Existing systems	0.02	ODP > 0.02	Phase-out schedule
Retrofit	0	ODP > 0	Replacement required

Refrigerant Selection:

Refrigerant	ODP	GWP	Classification	Status
R-11	1.0	4,750	Banned	Prohibited
R-12	1.0	10,900	Banned	Prohibited
R-22	0.055	1,810	Phase-out	Restricted
R-123	0.02	77	Acceptable	Limited use
R-134a	0	1,430	Acceptable	Standard
R-410A	0	2,088	Acceptable	Standard
R-32	0	675	Acceptable	Low GWP
R-1234yf	0	< 1	Acceptable	Very low GWP

Leak Prevention Requirements:

System Size	Maximum Leak Rate	Detection	Notes
< 50 lb charge	5% per year	Optional	Small systems
50-200 lb	3% per year	Required	Medium systems
> 200 lb	2% per year	Required	Large systems

Recovery Requirements:

Recovery equipment required
Certified technicians
Proper disposal
Documentation

Global Warming

Requirements:

Low GWP refrigerants
Energy efficiency
Carbon reduction
Life-cycle assessment

GWP Requirements:

Application	Maximum GWP	Enhanced	Notes
New systems	2,500	750	Standard
Retrofit	2,500	750	Replacement
Special applications	2,500	1,500	Exceptions

Carbon Footprint Calculation:

CO_2 = E \times EF_{grid} + R \times GWP \times L

Where:

$CO_2$ = Annual CO₂ equivalent (kg)
$E$ = Annual energy (kWh)
$EF_{grid}$ = Grid emission factor (kg CO₂/kWh)
$R$ = Refrigerant charge (kg)
$GWP$ = Global warming potential
$L$ = Annual leak rate

Typical Emission Factors:

Energy Source	Emission Factor (kg CO₂/kWh)	Notes
Grid electricity (US average)	0.5	Varies by region
Natural gas	0.2	Direct combustion
Heating oil	0.27	Direct combustion
Renewable	0	Solar, wind

Carbon Reduction Targets:

Building Type	Baseline Reduction	Enhanced Reduction	Notes
Office	30%	50%	vs. ASHRAE 90.1
Retail	30%	50%	vs. ASHRAE 90.1
Residential	20%	40%	vs. code baseline

Life-Cycle Assessment:

LCA = E_{embodied} + E_{operational} + E_{end-of-life}

Where:

$LCA$ = Life-cycle energy (kWh)
$E_{embodied}$ = Embodied energy
$E_{operational}$ = Operational energy
$E_{end-of-life}$ = End-of-life energy

Materials and Resources

Material Selection

Requirements:

Recycled content
Regional materials
Rapidly renewable
Certified wood

Recycled Content Requirements:

Material Type	Minimum Recycled Content	Enhanced	Notes
Steel	25%	50%	Post-consumer + pre-consumer
Concrete	20%	40%	Fly ash, slag
Insulation	10%	25%	Recycled content
Carpet	10%	25%	Post-consumer

Regional Material Requirements:

Material Type	Regional Distance	Enhanced	Notes
Building materials	500 miles (800 km)	100 miles (160 km)	Manufacturing location
Raw materials	500 miles (800 km)	100 miles (160 km)	Extraction location

Regional Material Calculation:

RM = \frac{M_{regional}}{M_{total}} \times 100\%

Where:

$RM$ = Regional material percentage
$M_{regional}$ = Cost of regional materials
$M_{total}$ = Total material cost

Rapidly Renewable Materials:

Material Type	Renewal Period	Notes
Bamboo	3-7 years	Fast-growing
Cork	9-13 years	Sustainable harvest
Linoleum	1-5 years	Natural materials
Straw	1 year	Agricultural waste

Certified Wood Requirements:

Certification	Minimum	Enhanced	Notes
FSC certified	50%	90%	Forest Stewardship Council
SFI certified	50%	90%	Sustainable Forestry Initiative
Other certified	50%	90%	Recognized programs

Construction Waste

Requirements:

Waste reduction
Recycling
Diversion targets
Documentation

Waste Diversion Targets:

Target Level	Diversion Rate	Notes
Minimum	50%	Standard requirement
Enhanced	75%	Better performance
Maximum	90%	Excellent performance

Waste Diversion Calculation:

WD = \frac{W_{diverted}}{W_{total}} \times 100\%

Where:

$WD$ = Waste diversion (%)
$W_{diverted}$ = Diverted waste (tons)
$W_{total}$ = Total waste (tons)

Typical Waste Generation:

Building Type	Waste per m²	Waste per ft²	Notes
Office	50-100 kg	10-20 lb	New construction
Retail	40-80 kg	8-16 lb	New construction
Residential	30-60 kg	6-12 lb	New construction

Waste Categories:

Category	Typical %	Recyclable	Notes
Concrete	30-40%	Yes	Crush and reuse
Wood	15-25%	Yes	Recycle or reuse
Metal	5-10%	Yes	High value
Drywall	10-15%	Yes	Gypsum recycling
Cardboard	5-10%	Yes	Paper recycling
Mixed	10-20%	Partial	Sorting required

Construction Practices

Commissioning

Requirements:

Enhanced commissioning
Systems verification
Performance testing
Documentation

Commissioning Scope:

System Type	Commissioning Level	Notes
HVAC	Enhanced	Full testing
Lighting	Enhanced	Control verification
Building envelope	Standard	Air leakage testing
Renewable energy	Enhanced	Performance verification
Water systems	Standard	Flow verification

Testing Requirements:

Test Type	Frequency	Acceptance Criteria	Notes
Functional testing	All systems	Per design	Operational
Performance testing	Critical systems	Per specification	Efficiency
Load testing	HVAC	Design conditions	Capacity
Seasonal testing	HVAC	All seasons	Year-round

Quality Assurance

Requirements:

Construction inspection
Performance verification
Testing
Documentation

Inspection Requirements:

Phase	Inspection Type	Frequency	Notes
Design	Document review	Continuous	Quality control
Construction	Site inspection	Weekly	Progress verification
Installation	System verification	Per system	Functional testing
Final	Acceptance testing	Complete	Performance verification

Renewable Energy

On-Site Generation

Requirements:

Renewable energy systems
Minimum generation
Grid connection
Performance monitoring

Renewable Energy Options:

System Type	Typical Capacity	Efficiency	Notes
Photovoltaic	1-5 W/ft²	15-22%	Roof or ground mount
Solar thermal	0.5-1.0 W/ft²	40-60%	Hot water
Wind	Variable	30-45%	Site dependent
Geothermal	Variable	300-400% COP	Heat pump

Generation Requirements:

Option	Minimum Generation	Enhanced	Notes
Renewable energy	2% of energy	5% of energy	On-site generation
Renewable credits	5% of energy	10% of energy	Off-site purchase
Combination	5% total	10% total	Mixed approach

PV System Sizing:

P_{PV} = A_{roof} \times \eta_{PV} \times I_{solar} \times PR

Where:

$P_{PV}$ = PV capacity (kW)
$A_{roof}$ = Available roof area (m²)
$\eta_{PV}$ = PV efficiency (15-22%)
$I_{solar}$ = Solar irradiance (kWh/m²·year)
$PR$ = Performance ratio (0.75-0.85)

Typical Annual Generation:

Location	Annual Irradiation (kWh/m²)	Generation (kWh/kW)	Notes
Southwest US	2,000-2,500	1,500-1,900	High solar
Southeast US	1,500-2,000	1,100-1,500	Good solar
Northeast US	1,200-1,500	900-1,100	Moderate solar
Northwest US	1,000-1,200	750-900	Lower solar

Compliance Methods

Mandatory Requirements

All mandatory requirements must be met:

Site sustainability
Water efficiency
Energy efficiency
Indoor environmental quality

Mandatory Checklist:

Category	Requirements	Verification	Notes
Site	Heat island, light pollution	Documentation	All required
Water	Fixture flow rates	Product data	All fixtures
Energy	30% better than 90.1	Energy model	Performance
IAQ	Ventilation, comfort	Testing	All spaces

Performance Options

Optional performance enhancements:

Additional credits
Innovation
Regional priorities
Performance paths

Credit Categories:

Category	Available Credits	Notes
Site sustainability	5-10	Enhanced features
Water efficiency	5-10	Beyond minimum
Energy efficiency	10-20	High performance
IAQ	5-10	Enhanced quality
Materials	5-10	Sustainable materials
Innovation	5	New approaches

Practical Application Examples

Example 1: Office Building

Building:

10,000 m² (107,640 ft²) office
Climate Zone 4
LEED Gold target

Energy Performance:

Baseline (ASHRAE 90.1): 180 kWh/m²·a
Target (30% reduction): 126 kWh/m²·a
Achieved: 120 kWh/m²·a (33% reduction)

Strategies:

High-efficiency HVAC (COP 6.0)
LED lighting (7.0 W/m²)
Energy recovery (70% efficiency)
Advanced controls
Daylight integration

Water Performance:

Baseline: 50 L/person·day
Target: 35 L/person·day (30% reduction)
Low-flow fixtures
Rainwater harvesting

Results:

Energy: 33% reduction ✓
Water: 32% reduction ✓
LEED: Gold certified ✓

Example 2: Retail Building

Building:

5,000 m² (53,820 ft²) retail
Climate Zone 3
Green building certification

Energy Performance:

Baseline: 220 kWh/m²·a
Target: 154 kWh/m²·a (30% reduction)
Achieved: 150 kWh/m²·a (32% reduction)

Strategies:

High-efficiency equipment
LED lighting (12 W/m²)
Demand-controlled ventilation
Reflective roof (SRI 90)

Water Performance:

Low-flow fixtures
Native landscaping
Efficient irrigation
40% reduction achieved

Best Practices

Design Practices

Integrated Design:

Early team collaboration
Performance optimization
Life-cycle cost analysis
Sustainability focus

Energy Optimization:

Exceed minimum requirements
Optimize building envelope
High-efficiency systems
Renewable energy integration

Water Optimization:

Minimize water use
Reuse and recycling
Efficient irrigation
Rainwater management

Construction Practices

Quality Assurance:

Regular inspections
Performance verification
Testing and documentation
Training programs

Waste Management:

Source reduction
Recycling programs
Diversion tracking
Documentation

Conclusion

ASHRAE Standard 189.1 provides comprehensive requirements for high-performance green buildings. Key aspects include:

Sustainability Categories:

Site sustainability
Water efficiency
Energy efficiency
Indoor environmental quality
Materials and resources

Performance Requirements:

Mandatory minimums
Enhanced options
Innovation credits
Performance paths

Implementation:

Integrated design
Quality construction
Commissioning
Ongoing performance

By understanding and applying ASHRAE 189.1, designers can create sustainable, high-performance buildings that exceed standard requirements, reduce environmental impact, and provide superior indoor environmental quality for occupants.

ASHRAE 189.1: Complete Guide to Standard for the Design of High-Performance Green Buildings

ASHRAE 189.1: Complete Guide to Standard for the Design of High-Performance Green Buildings

Introduction to ASHRAE 189.1

Purpose and Scope

Scope

Site Sustainability

Site Selection

Heat Island Reduction

Light Pollution Reduction

Water Use Efficiency

Indoor Water Use

Outdoor Water Use

Water Metering

Energy Efficiency

Energy Performance

HVAC Systems

Lighting

Indoor Environmental Quality

Ventilation

Thermal Comfort

Acoustic Performance

Lighting Quality

Building Impact on Atmosphere

Ozone Depletion

Global Warming

Materials and Resources

Material Selection

Construction Waste

Construction Practices

Commissioning

Quality Assurance

Renewable Energy

On-Site Generation

Compliance Methods

Mandatory Requirements

Performance Options

Practical Application Examples

Example 1: Office Building

Example 2: Retail Building

Best Practices

Design Practices

Construction Practices

Conclusion

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