BPI Healthy Home Evaluator (HHE) Overview
These study notes are designed to prepare candidates for the BPI Healthy Home Evaluator (HHE) certification exam. The HHE credential focuses on identifying and mitigating health and safety hazards in homes, including indoor air quality, moisture, toxic exposures, pests, combustion safety, and occupant safety. The notes are based on official BPI standards, ASHRAE, ICC codes, and ACCA manuals. Candidates should verify specific pass marks, fees, and eligibility with BPI.
For Technical Conquer practice planning, this module is tracked as 80 questions over about 120 minutes with a listed pass mark of 70%. Treat those numbers as practice baselines and verify the current official format before scheduling.
How This Guide Is Organized
The sections below turn the syllabus into studyable subject blocks. Read a subject first, explain the must-know ideas without notes, then use questions, flashcards, and mind maps to test whether the knowledge holds under field-style pressure.
- Indoor Air Quality and Respiratory Health Assessment
- Moisture Management and Structural Integrity
- Toxic Hazards and Chemical Exposure Mitigation
- Integrated Pest Management (IPM) and Biological Control
- Combustion Safety and Energy System Hazards
- Occupant Safety, Injury Prevention, and Communication
Exam Snapshot and Readiness Target
Format: 80 questions, 120 minutes, pass mark 70% (practice baseline; verify with BPI)
Candidate level: Entry-level to technician; suitable for energy auditors, home inspectors, and weatherization professionals
Readiness target: Demonstrate ability to assess and recommend remedies for common residential health and safety hazards
Most candidates should budget at least 36+ focused study hours, then adjust upward for unfamiliar equipment, code, regulatory, commissioning, controls, or calculation-heavy content.
Indoor Air Quality and Respiratory Health Assessment
Syllabus Focus
- Sources of indoor air pollutants
- Health effects of poor IAQ
- Measurement techniques (CO2, PM, VOCs, humidity)
- Ventilation standards (ASHRAE 62.2)
Key Notes
- Indoor air quality (IAQ) is affected by pollutants from combustion, building materials, cleaning products, and biological sources.
- ASHRAE Standard 62.2 specifies minimum ventilation rates for residential buildings: 7.5 cfm per bedroom + 0.01 cfm per square foot of conditioned floor area.
- Common IAQ measurements include CO2 (indicator of occupancy and ventilation), particulate matter (PM2.5, PM10), total volatile organic compounds (TVOCs), and relative humidity (target 30-50%).
- Respiratory health effects range from irritation to asthma exacerbation and chronic obstructive pulmonary disease (COPD).
- Field assessment includes visual inspection for mold, moisture, and combustion appliance backdrafting, plus use of IAQ meters.
Must Know
- ASHRAE 62.2 ventilation rates and how to calculate required cfm.
- Health-based guidelines: EPA recommends PM2.5 < 12 µg/m³ annual mean, CO < 9 ppm (8-hour), and relative humidity 30-50%.
- Sources of VOCs: paints, adhesives, new furniture, cleaning products; off-gassing decreases over time.
- CO2 levels above 1000 ppm indicate inadequate ventilation; above 2000 ppm may cause drowsiness.
Field and Exam Application
- Use a blower door to measure building airtightness and calculate natural infiltration for ventilation design.
- Conduct a pressure diagnostic to ensure no negative pressure that could draw pollutants from attached garages or crawlspaces.
- Recommend source control (e.g., low-VOC materials) and mechanical ventilation (e.g., ERV/HRV) for homes with poor IAQ.
High-Yield Distinctions
- Difference between source control, ventilation, and air cleaning: source control is most effective.
- ASHRAE 62.2 applies to single-family and multifamily dwellings; local codes may have amendments.
- IAQ assessment is not the same as a health risk assessment; it identifies potential hazards but does not diagnose illness.
Common Pitfalls
- Assuming a home with low CO2 has good IAQ; other pollutants may still be present.
- Overlooking attached garages as a source of CO and VOCs.
- Using only one IAQ measurement point; multiple locations and times are needed for representative data.
Review Tasks
- Calculate ventilation rate for a 2000 sq ft home with 3 bedrooms using ASHRAE 62.2.
- List three common indoor pollutants and their health effects.
- Describe the procedure for measuring CO2 in a home.
Moisture Management and Structural Integrity
Syllabus Focus
- Sources of moisture (bulk water, capillary, vapor diffusion)
- Mold and rot prevention
- Building envelope moisture control
- Dew point and condensation
Key Notes
- Moisture enters homes through bulk water (leaks), capillary action (ground contact), and vapor diffusion (air movement).
- Relative humidity above 60% promotes mold growth; keep below 50% to prevent condensation on cold surfaces.
- The building envelope must include a water-resistive barrier (WRB), air barrier, and vapor retarder appropriate for climate zone.
- Dew point temperature determines when condensation occurs; insulation and air sealing prevent condensation within wall cavities.
- Field diagnostics include moisture meters, infrared thermography, and blower door testing to locate air leaks.
Must Know
- Climate zone vapor retarder requirements: in cold climates, Class I or II vapor retarder on the warm side; in hot-humid climates, avoid vapor retarders that trap moisture.
- Grading around foundation: slope away from house at least 6 inches over 10 feet.
- Crawlspace moisture control: seal ground with vapor barrier, ventilate or condition per code.
- Mold remediation principles: fix moisture source, remove contaminated materials, dry within 24-48 hours.
Field and Exam Application
- Use a moisture meter to check wood moisture content (target < 16% for structural wood, < 12% for flooring).
- Perform a pressure test to identify air leaks that carry moisture into wall cavities.
- Recommend dehumidification in basements with high humidity, and ensure proper drainage around foundation.
High-Yield Distinctions
- Difference between vapor diffusion and air-transported moisture: air leaks carry much more moisture than diffusion.
- Class I vapor retarder (e.g., polyethylene) vs. Class II (e.g., kraft-faced insulation): Class I is more restrictive.
- Mold vs. mildew: mold is a fungus that can cause structural damage and health issues; mildew is a surface fungus.
Common Pitfalls
- Installing vapor retarder on the wrong side of the wall (e.g., cold side in cold climate).
- Ignoring bulk water leaks because interior finishes appear dry.
- Assuming a dehumidifier alone solves moisture problems without addressing the source.
Review Tasks
- Identify the correct vapor retarder class for your climate zone.
- Explain how to use a moisture meter to assess a wet basement wall.
- List three steps to prevent condensation in an attic.
Toxic Hazards and Chemical Exposure Mitigation
Syllabus Focus
- Lead-based paint hazards
- Asbestos-containing materials
- Carbon monoxide (CO) and nitrogen dioxide (NO2)
- Radon gas
Key Notes
- Lead-based paint is a hazard in homes built before 1978; EPA RRP rule requires certified renovators for work disturbing paint.
- Asbestos is found in insulation, floor tiles, and pipe wrap; avoid disturbance; require abatement by licensed professionals.
- Carbon monoxide is produced by incomplete combustion; CO alarms required in homes with combustion appliances or attached garages.
- Radon is a radioactive gas from soil; EPA action level is 4 pCi/L; mitigation involves sub-slab depressurization.
- Field testing: CO meters (ppm), radon test kits (short-term or long-term), and visual inspection for deteriorating paint.
Must Know
- EPA lead-safe work practices: contain dust, use HEPA vacuums, and clean up thoroughly.
- CO alarm placement: on each level, outside sleeping areas; test monthly; replace every 5-7 years.
- Radon testing: closed-house conditions for short-term test (2-7 days); test in lowest livable level.
- NO2 is a combustion byproduct; levels above 0.1 ppm may cause respiratory irritation.
Field and Exam Application
- During a home assessment, check for peeling paint in pre-1978 homes and recommend lead testing.
- Inspect furnace and water heater for proper venting; measure CO in flue gas and ambient air.
- Place radon test kit in basement or first floor; instruct occupants to keep windows closed during test.
High-Yield Distinctions
- CO vs. CO2: CO is toxic at low concentrations (ppm), CO2 is an asphyxiant at high concentrations (%).
- Short-term vs. long-term radon tests: short-term gives quick result, long-term (90+ days) gives average.
- Lead dust is the primary exposure pathway, not paint chips.
Common Pitfalls
- Assuming a home built after 1978 has no lead; some components may still contain lead.
- Using a CO alarm as a substitute for proper combustion appliance inspection.
- Not following closed-house conditions for radon test, leading to inaccurate results.
Review Tasks
- Describe the EPA RRP rule requirements for a renovation in a pre-1978 home.
- Explain how to test for radon and interpret results.
- List three sources of CO in a home and how to mitigate each.
Integrated Pest Management (IPM) and Biological Control
Syllabus Focus
- IPM principles (prevention, monitoring, control)
- Common pests (rodents, insects, termites)
- Biological contaminants (mold, bacteria, dust mites)
- Pesticide safety and alternatives
Key Notes
- IPM focuses on long-term prevention through sanitation, exclusion, and habitat modification, with pesticides as a last resort.
- Common entry points: gaps around pipes, doors, windows, and foundation cracks; seal with caulk, steel wool, or copper mesh.
- Mold requires moisture and organic material; control moisture to prevent mold growth.
- Dust mites thrive in warm, humid environments; reduce humidity and use allergen-proof covers.
- Field assessment: look for droppings, gnaw marks, nests, and moisture issues; use moisture meter and hygrometer.
Must Know
- IPM steps: 1) Identify pest, 2) Monitor population, 3) Set action threshold, 4) Implement prevention, 5) Evaluate.
- Rodent exclusion: seal holes larger than 1/4 inch; use metal mesh for durability.
- Pesticide labels are legal documents; follow all instructions and safety precautions.
- Biological control: use beneficial insects (e.g., ladybugs) or microbial agents (e.g., Bacillus thuringiensis) for some pests.
Field and Exam Application
- Inspect attic and crawlspace for rodent entry points and droppings; recommend exclusion and trapping.
- Identify mold growth and recommend moisture control and remediation.
- Advise homeowners on reducing dust mite exposure: wash bedding in hot water, use dehumidifier.
High-Yield Distinctions
- IPM vs. conventional pest control: IPM emphasizes prevention and minimal pesticide use.
- Mold vs. mildew: mold penetrates materials, mildew is surface growth; both require moisture control.
- Dust mites are not insects but arachnids; they feed on skin flakes.
Common Pitfalls
- Using pesticides as the first line of defense without addressing entry points or sanitation.
- Ignoring moisture problems when treating mold; mold will return if moisture persists.
- Sealing entry points without first removing pests inside, trapping them inside the home.
Review Tasks
- Outline an IPM plan for a home with cockroach infestation.
- List three ways to reduce dust mite allergens in a bedroom.
- Explain why sealing entry points is more effective than spraying pesticides for rodents.
Combustion Safety and Energy System Hazards
Syllabus Focus
- Combustion appliance types (furnace, water heater, boiler, fireplace)
- Flue gas spillage and backdrafting
- CO and NOx production
- Venting systems and draft testing
Key Notes
- Combustion appliances must be properly vented to the outdoors to prevent CO buildup.
- Spillage occurs when flue gases do not exit through the chimney; backdrafting is when outdoor air pushes flue gases back into the home.
- Draft testing: measure draft pressure in flue (typically -0.02 to -0.04 in w.c. for natural draft).
- Depressurization from exhaust fans, dryers, or unbalanced HVAC can cause backdrafting.
- Field protocol: perform worst-case depressurization test with all exhaust fans on and doors closed.
Must Know
- BPI standard: CO in flue gas should be < 100 ppm air-free for gas appliances; CO in ambient air < 9 ppm.
- Combustion air requirements: appliances need adequate air for combustion; follow NFPA 54/ANSI Z223.1.
- Signs of backdrafting: soot around appliance, moisture on windows, CO alarm activation.
- Energy system hazards: improper installation of high-efficiency furnaces can cause condensation issues.
Field and Exam Application
- Perform a worst-case depressurization test: measure pressure difference between room and outdoors with all exhausts on.
- Use a manometer to measure draft in flue; check for spillage at draft hood.
- Inspect vent connectors for proper slope, clearance, and corrosion.
High-Yield Distinctions
- Natural draft vs. induced draft vs. sealed combustion: sealed combustion is safest as it draws air from outside.
- Spillage vs. backdrafting: spillage is temporary, backdrafting is continuous.
- CO from incomplete combustion vs. CO2 from complete combustion: CO is toxic, CO2 is not at low levels.
Common Pitfalls
- Assuming a CO alarm is sufficient; it only detects CO after it has accumulated.
- Not testing for spillage during worst-case conditions (e.g., all exhaust fans running).
- Overlooking the impact of kitchen and bathroom exhaust fans on depressurization.
Review Tasks
- Describe the procedure for a worst-case depressurization test.
- List three conditions that can cause backdrafting.
- Explain the difference between a natural draft and a sealed combustion furnace.
Occupant Safety, Injury Prevention, and Communication
Syllabus Focus
- Fall hazards (stairs, railings, windows)
- Electrical safety (shock, fire)
- Fire safety (smoke alarms, egress)
- Communication with occupants (health concerns, remediation plans)
Key Notes
- Common fall hazards: missing handrails, uneven steps, poor lighting, clutter on stairs.
- Electrical hazards: exposed wiring, overloaded circuits, lack of GFCIs in wet areas.
- Smoke alarms: required on every level, inside each bedroom, and outside sleeping areas; test monthly.
- Egress: bedrooms must have an operable window or door to the outside for emergency escape.
- Communication: explain findings in plain language, respect occupant concerns, and provide written report.
Must Know
- NFPA 72: smoke alarms should be interconnected; replace every 10 years.
- GFCI protection required in bathrooms, kitchens, garages, basements, and outdoors per NEC.
- Stairway handrails required on at least one side; maximum riser height 7.75 inches per IRC.
- Window egress: minimum opening area 5.7 sq ft, height 24 inches, width 20 inches; sill height ≤ 44 inches.
Field and Exam Application
- Inspect stairs for handrail continuity and slip resistance; recommend repairs if needed.
- Test GFCI outlets with a tester; check for missing or non-functional smoke alarms.
- Discuss findings with occupants, prioritize hazards, and provide actionable recommendations.
High-Yield Distinctions
- Smoke alarm vs. CO alarm: smoke alarms detect smoke particles; CO alarms detect CO gas; both are needed.
- GFCI vs. AFCI: GFCI protects against shock, AFCI protects against arc faults (fire).
- Egress window requirements vary by jurisdiction; verify local codes.
Common Pitfalls
- Assuming a smoke alarm works because it beeps when tested; test with actual smoke or test button.
- Overlooking trip hazards like loose rugs or cords.
- Failing to communicate hazards in a way that motivates action without causing undue alarm.
Review Tasks
- List the required locations for smoke alarms in a home.
- Describe how to test a GFCI outlet.
- Explain the importance of egress windows in bedrooms.
How To Use These Notes With Practice Questions
Do not jump straight from reading to a full mock. Work by subject first: review the key notes, make a short recall sheet from memory, then answer a focused question set. After each miss, decide whether the problem was missing theory, weak code/source recall, poor measurement setup, calculation error, or a field sequence you did not visualize.
Technical Conquer's question bank, flashcards, mind maps, and spaced review tools are most useful after this instruction layer because they reveal which parts of the notes are not yet retrievable.
Final Review Checklist
- Review ASHRAE 62.2 ventilation calculations and IAQ measurement techniques.
- Understand moisture control principles and vapor retarder placement by climate zone.
- Know lead, asbestos, CO, and radon hazards and mitigation strategies.
- Apply IPM steps and differentiate between pest control methods.
- Master combustion safety testing: draft, spillage, and worst-case depressurization.
- Familiarize with occupant safety codes: smoke alarms, GFCI, egress, and fall prevention.
- Practice communicating findings clearly and prioritizing hazards.
Official Sources and Further Reading
Use these sources as the final authority for format, eligibility, rules, regulatory limits, and exam updates. Study notes are a preparation layer, not a replacement for official candidate guidance.