Standardized Curriculum WAP Training Plans and Resources Goals of - - PowerPoint PPT Presentation

Standardized Curriculum

WAP Training Plans and Resources

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Goals of Standardized Curriculum

• Compile institutional knowledge
• Create baseline
• Core Competencies
• Flexibility
• Sections
• Editable
• Useful to instructors of all experience levels
• Free to all

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WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Standardized Curriculum is not…

• All things to all people
• Substitute for good, engaging instructors

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WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Process

• Input from Trainers and the field
• Review module outlines
• Create module
• Technical and training review and field testing
• Revisions
• Roll-out
• Feedback
• Revisions

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WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Modules

• Installer Fundamentals
• Installer Intermediate
• Installer – Mobile Homes
• Energy Auditor
• Crew Chief
• Technical

Monitoring/Inspecting

• Train the Trainer
• Heating System Training

for Energy Auditors and Inspectors

• Heating and Cooling

System Training for HVAC Contractors

• Multifamily Specialties

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WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Example: Installer Fundamentals

• Presentation
• Speaker’s Notes
• Lesson Plans
• Sample Course Schedule
• Hands On Props
• Additional Resources
• Glossary

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WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

What’s Included?

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WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Overview

• Introduction to the Weatherization Assistance Program
• Communication Skills
• House as a System
• Building Science Basics
• Blower Door Basics
• Pressure and Thermal Boundaries
• Combustion Safety
• Worker Safety
• Materials, Tools, & Equipment
• Typical Weatherization Measures
• Mobile Home Basics
• Multifamily Basics

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WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Learning Objectives

By attending this session, participants will:

• Understand the difference between thermal and air barriers
• Know the proper location of thermal and air barriers
• Recognize the driving forces of air leakage
• Understand the connection between air leakage, energy

waste, and moisture problems

• Understand how air ducts affect pressure balances within

the home

• Understand the principle behind the blower door as a tool

for measuring air leakage

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BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Comfort, Safety, and Efficiency

A comfortable, safe, and energy-efficient home requires:

• A fully insulated thermal envelope
• A well-sealed air boundary
• The thermal and air boundaries to be continuous and

in contact with one another

• Efficient, properly sized equipment to condition the

living space and heat water

• A well-designed and balanced air distribution system
• Healthy indoor air quality

BUILDING SCIENCE BASICS

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WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Thermal Boundary

The Thermal Boundary:

• Limits heat flow between inside and outside
• Easy to identify by presence of insulation
• The location of insulation in relation to other building

components is critical to its effectiveness

• Even small areas of

missing insulation are very important

• Voids of 7% can

reduce effective R-value by almost 50%

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BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM 12

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Air Barrier

The Air Barrier:

• Limits airflow between inside and outside
• More difficult to identify
• Not always where you think it is
• Blower door is used to

locate air barrier

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BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Air Leakage

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Air leakage requires:

• A hole
• Pressure difference across that hole
• The bigger the hole or higher

the pressure difference, the more airflow

• To reduce airflow, we can reduce the

size of the hole or lower the pressure difference

BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Air Leakage

• Airflow is measured in cubic feet per minute, also written

as ft3/min, or CFM

• 1 CFM OUT = 1 CFM IN
• Airflow takes the path of least resistance
• Air moves from high- to low-pressure areas
• Air usually moves from high- to low-temperature areas

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BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Air Leakage

Direct Leakage

• ccurs at direct openings to
• utdoors. Leakage enters

and exits at same location.

Indirect Leakage

Leakage enters at one location, moves through building cavities, and exits at a different location.

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BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Air Leakage

Ventilation = Controlled air leakage

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Exfiltration = Air leaking out Infiltration = Air leaking in

BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Driving Forces of Air Leakage

Driving Forces of Air Leakage

Temperature and pressure differences – usually between inside the house and outside The bigger the temperature or pressure difference, the greater the air and heat flow

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BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Air Leakage: Temperature

T = Temperature Difference

Winter Summer 70° 10° 70° 90° T=60° T=20°

Flow is from _____ to _____ The higher the T, the ______ heat and air want to escape or enter the building

hot cold more

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BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Air Leakage: Pressure

P = Pressure Difference

Flow is from ________________ to ________________ pressure For every CFM that _______, one CFM _______ Flow takes the path of _______ resistance

Positive Negative

positive (high) negative (low) enters exits least

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BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Air Leakage: Driving Forces

Types of Driving Forces

Wind Heat – Stack effect, combustion Fans – Exhaust fans, duct leaks, interior doors

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BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Driving Forces: Wind Effect

WIND DIRECTION

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BUILDING SCIENCE BASICS

Wind creates a positive pressure on the windward side of the building . . .

positive pressure negative pressure

Which creates a negative pressure

• n the other sides
• f the house

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Driving Forces: Stack Effect

Stack Effect

Warmer air rises and escapes out of the top of the house. . . Which creates a suction that pulls in

• utside air at the

bottom of the house

negative pressure Neutral pressure plane

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BUILDING SCIENCE BASICS

positive pressure

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM 24

Positive pressure (with reference to outside) Neutral pressure plane

David Keefe Vermont Energy Investment Corp.

Negative pressure (with reference to outside)

Stack Effect

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Driving Forces: Combustion & Fans

Combustion Equipment & Exhaust Fans

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Exhaust Fan Negative pressure Negative pressure

BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Driving Forces: Duct Leakage

Duct leakage can create positive and negative pressures in different areas of the house The pressures associated with duct leaks can be larger and more important because the driving force is stronger

All holes are not created equal!

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Duct Leakage

Return Supply

BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Driving Forces: Duct Leakage

Closed doors that prevent supply air from getting back to a return cause positive pressures in those rooms with supply vents. . . . Meanwhile, starving the return for air, causing negative pressure in the zone where the return is located.

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Duct Leakage

Return Supply

BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Driving Forces: Imbalances

Master Bedroom Bedroom Bath Utility Room Kitchen Living Room

Whole-house return in hallway

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Room Pressure Imbalances

BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Controlled Driving Force

Using the blower door depressurizes the house, drawing air through all the holes between inside and outside

negative pressure

Blower Door

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Use a Blower Door as a Controlled Driving Force

BUILDING SCIENCE BASICS

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM

Summary

• Pressure and thermal boundaries should be

continuous and in contact with each other

• Air carries heat and moisture
• Air leakage requires a hole and pressure difference
• Wind, heat and fans drive pressure differences
• Duct location and condition can cause room

pressure imbalances

• Blower door is a controlled driving force for

quantifying air leakage

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BUILDING SCIENCE BASICS

Questions?

Kelly Cutchin kcutchin@sms-results.com 202.558.9742