Glossary -Scientific Terms Defined


The place where technical and scientific terms are defined.


Air changes per hour (ACH )

Air changes per hour (ACH ) is a common unit of measure of ventilation rate for a space, or air leakage rate for a building. In scientific terms defined as the volumetric flow rate divided by the volume of the space considered; where N = number…

Air Handling Unit (AHU)

Air Handling Unit (AHU) is a mechanical device, comprised of an enclosure, and a fan to move the air.  Used to cicuclare and regulare air, heating,cooling and ventilation.  

Airtight Building

An airtight building prevents the entrance or escape of air, and has no weak points or openings. Ecocor Passive House achieves its airtightness through its PassivWall™ construction. Which also also includes a heat recovery ventilation system to…

Airtight building

In terms of Airtightness Construction, a maximum of 0.6 air changes per hour at 50 Pascals pressure (ACH50), as verified with an onsite pressure test. Which determines that there are no unintended gaps in the building envelope that allow air to…

Borate treated

Borate treated materials are cured in boric acid, which is naturally occuring and less toxic than table salt. It creates flame-resistance in insulation, redistributes natural moisture accumulation in walls and resists pests. Ecocor uses 100%…

British thermal unit (Btu)

Btu (British Thermal Unit) is common unit of heat, determined by the heat required to raise the temperature of a pound of water 1°F.

Building Envelope

The building envelope consists of all the building elements which separate the inside from the outside; e.g. walls, joint roof. Ecocor’s design systems remain airtight and watertight, offering comfortable indoor climates despite the weather…

Cellulose Insulation

Cellulose insulation is one of the most eco-friendly insulation materials available. It is made from recycled paper materials, and treated with mineral borate - which is flame-resistant in addition to sound dampening barrier. It is part of the…

Certified Passive House

A Certified Passive House is a performance-based energy standard in building construction as defined by the Passive House Institute. While a Passive House building does not need to be certified to be considered a Passive House, certification…


Condensation is the conversion of a vapor or gas to a liquid, by extracting heat.

Continuous insulation (CI)

In accordance to the American Society of Heating, Refrigerating and Air-Conditioning Engineers(ASHRAE) standard 90.1; Continuous Insulation (CI) is insulation that is continuous across all structural members without thermal bridges other than…

Energy Demand

Energy Demand is the requirement for Energy as an input to provide output.

Green Building

Is a broad term that encapsulates eco-friendly materials, environmentally responsible and resource-efficient building construction.

High Performance Building

High Performance is a building philosophy that assimilates and optimizes all the high performance building characteristics into one. A construction life-cycle that is conscious of the environment, energy conservation, sustainable resources,…


Humidity is the mass of water vapor per unit volume; quantity of atmospheric moisture.

Net Zero Building (ZEB)

Any building characterized by net energy consumption and zero carbon emissions calculated over a period of time.Ecocor incorporates renewable energy and effieceny into the design - Ecocor Passive House is the easiest path to a new zero home.

Passive House (PH)

The world‘s leading standard in energy efficient design, focusing on Thermal Insulation, High Performance Windows, Ventilation/Heat recovery, Airtightness, and Thermal Bridge free design.

Passive House Institute (PHI)

The Passive House Institute (PHI) is an independent research institute that has played an especially crucial role in the development of the Passive House concept - the only internationally recognized, performance-based energy standard in…

Passive House Planning Package (PHPP)

The Passive House Planning Package (PHPP) contains everything necessary for designing a properly functioning Passive House. The PHPP prepares an energy balance and calculates the annual energy demand of the building based on the user input…

Passive House Standard

Passive House Standard is not an energy standard, but an integrated concept assuring the highest level of quality, comfort and energy efficiency. A building must meet the Passive House certification criteria to meet the Passive House Standard.…

Passive Solar

Passive Solar Is the idea of capturing energy from the sun to use it later for heating and cooling the home. This is not to be confused with Passive House. Ecocor Passive Houses use solar panels to aid in energy demand and cost efficiency, but…


PassivWall™ - (Formerly known as Ecocor’s SuperWall) Is panelized construction of walls assembly that has been assessed by scientists and engineers in Germany. They are assembled as part of a system - pre-insulated indoors (at Ecocor’s…


Is a measure of the resistance of an insulating or building material to heat flow, the higher the number, the greater the resistance to heat flow.

Solar Heating

Solar heating is to heat (a building) by means of solar energy. Positioning is important to the placement of the home, as a portion of the south side of your house must face the sun; collecting heat as the sun shines through south-facing…


Sustainability is the ability of a system to continue indefinitely.

Thermal Insulation

Thermal Insulation (formerly referred to by Ecocor as Superinsulation) - more accurately referred to as “Thermal Insulation” by the Passive House Institute -  is considered the most important requirement of a Passive House. The purpose of…

Triple Glazed

Triple Glazed - offer just that, triple protection from the elements. Three layers of glass separated by air spaces, preventing heat loss, and offering noise reduction. Ecocor uses these high performance solid wood triple glazed windows and…


The U-value is a measure of the flow of heat through an insulting or building materials, the lower the U-value, the better the insulating ability.

VOC (Volatile organic compounds)

Chemists describe “volatile” as a liquid that evaporates at room temperature; and “organic” as simply any carbon containing compound. VOCs are both found in nature and synthetic materials, they react with the atmosphere and emit into the air we…

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