healthy house institute

4 Free HHI Books:

Creating a Healthy Household, The Healthy House Answer Book, Healthy Home Building, The Healthy House 4th Edition
Your email will only be used as described in our Privacy Policy

Follow us on Twitter



Proud Supporter of:



We do not strictly control Google ad content. If you believe any Google ad is inappropriate, please email us directly here.



Passive Solar? Poly Moisture Barrier?

Don't know? Look it up!

Simply use the HHI Search form to the left to find definitions, explanations, advice for healthy building technologies, and more...all under the HHI-Pedia™ section.

Or you may browse the entire HHI-Pedia below.

HHI-Pedia links can also be found throughout HHI's articles and resources!

Simply click any highlighted link text within an article or entry to view more info on a particular topic.

View HHI-Pedia Entries

HHI-Pedia Entries

Partial-Bypass FilterA filter that removes some contaminants from the air, but allows some air to pass through without contacting the filter, usually to minimize the resistance to airflow.
Particle BoardMade from small softwood particles that resemble coarse sawdust, and is usually held together with potent urea-formaldehyde (UF) glue.
Particulate FilterAn air filter designed to remove particulates from the air.
ParticulatesSolid (or liquid) air pollutants, as opposed to gases.
Parts Per Millon (ppm)A small unit of measurement, often used to express the concentration of pollutants in the air.
PascalThe pascal (Pa) or kilopascal (kPa) is a unit of pressure measurement.
Pascal (Pa.)A small unit of pressure measurement, useful in diagnosing houses for tightness and ventilation. One pound per square inch (psi) equals about 7,000 Pascals.
Pass-ThroughAn opening between two rooms through which air can move when pressure imbalances occur between the rooms.
Passive SolarA home-energy alternative or addition to gas and utility electric.
Passive VentilationCaused by house pressurization or depressurization, not directly caused by a fan. Infiltration and exfiltration involve passive air movement.
People PollutantsSolids, liquids, and gases given off by humans as a normal part of the life process.
PerchlorateAs a pollutant, perchlorate is found in groundwater, surface water and soil and has proven to be a pervasive contaminant of agricultural and manufactured food products.
Permanent-Split-Capacitor MotorA type of electric motor characterized by a main winding and an auxiliary winding wired in series with a capacitor.
Permeable WallAn insulated part of a house’s structure through which outdoor air can pass from the outdoors to the indoors and is tempered in the process.
Personal Health Record (PHR) A Personal Health Record (PHR) is a tool that enables you to collect, manage and share past and current information about your health or the health of someone in your care.
PesticidesChemical compounds formulated to kill living creatures.
PhosphatesOnce widely used to soften water for use in washing machines, some makers have reduced use of these chemicals.
PicoCurie per liter (pC/l)A unit of measurement used to determine the concentration of radon in the air.
Pier FoundationsOften used in hot, humid climates, a pier foundation lifts a house up off the ground reducing health hazards from direct soil contact.
PlywoodMaterial made of several layers of wood glued together, which is widely used in home construction.
Poly Moisture BarrierSheets of heavy plastic that help keep moisture out.
Polyurethane and polyisocyanuratePolyurethane can be a flexible foam, as used in upholstery, or a rigid foam, as in insulation.
PorosityCapacity of a material to be penetrated through its pores, for example, by gases or vapors.
Positive PressureWhen the air pressure inside a house or room is greater than the atmospheric pressure outside the house or room.
Pounds per square inch (psi)A unit of pressure measurement.
Pressure WasherThey’re great outdoor cleaning tools, but they can cause severe injury or damage if misused.
PressurizationWhen the air pressure inside a house or room is greater than the atmospheric pressure outside the house or room.
Preventive MaintenanceA preventive, systematic approach to health, safety and comfort is a homeowner’s best defense against poor air quality, unexpected breakdowns and expensive repairs.
Protective GlovesKeep your hands (and, sometimes, forearms) safe from bacteria, spores or caustic chemicals.
Psychometric ChartA graph used to determine the moisture content and energy of air at different temperatures.

Browse HHI-Pedia by letter:

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z


We do not strictly control Google ad content. If you believe any Google ad is inappropriate, please email us directly here.



Information provided by The Healthy House Institute is designed to support, not to replace the relationship between patient/physician or other qualified healthcare provider.

Education Partners



Popular Topics: Air Cleaners & Air Purifiers | Allergies & Asthma | Energy Efficiency & Energy Savings | Healthy Homes | Green Building
Green Cleaning | Green Homes | Green Living | Green Remodeling | Indoor Air Quality | Water Filters | Water Quality

© 2006-2017 The Healthy House Institute, LLC.


About The Healthy House Institute | Contact HHI | HHI News & Media | Linking Resources | Advertising Info | Privacy Policy | Legal Disclaimer


HHI Info