Our 2013 Program: Energy and Indoor
environmental Quality in Modern or Modernized Buildings
Academic Scores due to IEQ
Advice for Consumers
Built to Code: Means what?
A Condition of Mind
Duct Tape: Not for
Earth Tube Heat Exch.'s
Energy and IEQ
Pipes in Concrete
Exergy & Sustainability
Flooring R values
Flooring and Boiler Efficiency
Health and HVAC systems
Health and IEQ
Heat, Air, Moisture Modelling
Heated Hardwood Flooring
History of Radiant Heating
Human Thermal Plume
Humidity & the Environment
HVAC & Energy Efficiency
Hybrid HVAC Systems
Is slab insulation needed?
Paying for Downgrades
Radiant Based HVAC Guide
Radiant Design Guide Part I
Radiant Design Guide Part II
Radiant Facts and Myths
Radiant Gone Wild
Radiant Mistakes to Avoid
Radiant Tube Depth: Effects
Walls for Retrofits
Pressure of Light
Reflective Insulation: Myths
Six Rules for
Snow Melting Storm Data
Thermal Comfort & IAQ
Thermal Comfort Survey
vs Skin Sensors
Water Heater Efficiency
Water Heaters as Boilers
for Cold Climates
Walls for Cold Climates
Solar and heat pumps
Send us your feedback
ASHRAE San Antonio Seminars
How to use
NRC's IA-QUEST IAQ and VOC
Prof. Roland Clift:
How to use
the ASHRAE Design Graph for Radiant Panels
Begin with the
End in Mind
Design tools for calculating
downward heat loss
TED Fellow Jessica Green on
Microbes in the built environment
how to divide a building into controlled spaces
A hybrid approach
Scanning electron micrograph images of building
materials - New and very cool!
Building Enclosures: A
Filter, Sponge and Capacitor
29 bits of wit, wisdom & witticisms
The Carlson - Holohan
Industry Award of Excellence
Indoor Air Quality Images
Want to See a Sneeze?
Allergens Up Close
Quality @ Home
Quotes on IEQ
For the kids
Indoor Air Quality
Thermal and Moisture Transport Property Database for
Common Building and Insulating Materials, Final Report from
ASHRAE Research Project 1018-RP, 2002
Equilibrium moisture content
(Sorption, Desorption and
Pressure Plate Measurements)
Water vapour permeance or
Water absorption coefficient
Moisture diffusivity and
Air permeance or permeability
Building Science for a Cold
Water in Buildings: An Architect's
Guide to Moisture and Mold
Building Science for Building
Journal of Building Enclosure
Thermal Performance of Building Envelope Details for Mid-
and High-Rise Buildings (ASHRAE 1365-RP)
Combined Heat and Moisture Transport Modeling
For Residential Buildings
There are many more references
manuals and research papers that we have reviewed, and yet to review but
do a Google search of the topic for an endless supply of
Have a book, paper or software
you'd like us to review?
Send us an email.
You can't beat Excel for a utilitarian tool for
number crunching and so long as you get the formulas and inputs
right - it will spit out the answers. We set up the wall
assembly below using the example from Hutcheon & Handegord 1983
classic, " Building Science for a Cold Climate (NRC-IRC)"
to validate the spreadsheets accuracy. Once you get the spreadsheet set up
you can use it to model whatever your heart fancies.
Figure 1. Screen shot of the temperature profile
through a wall assembly. The results of the model are based on
the formula and inputs shown in Figure 2. below.
Figure 2. Formula and inputs for modelling the
wall assembly above. This is steady state temperature
only, as such it is simplified in comparison to real world
performance which would also include the transient
characteristics of vapour pressure differentials, material
permeability and moisture absorptivity.
Figure 3. The results for the air space only of
an uninsulated section of the wall assembly.
Figure 4. The results for the wood stud only,
i.e. does not include the insulated portion.
Figure 5. The results for insulated section of
the wall assembly; does not include the framing factor.
Figure 6. The weighted average results for an
uninsulated wall assembly, i.e. includes resistances of the wood
stud and air space (no insulation).
Figure 7. The weighted average results for an
insulated wall assembly, i.e. includes resistances of the wood
stud and insulation. It is this performance which will have an
affect on the
mean radiant temperature of the space.
Figure 8. Upon completion of the analysis, one
can then evaluate the temperature profile of the wall and dew
points within the wall assembly for
identifying surface planes of concern.
The Heat, Air and Moisture Tool Kit
(Quirouette Building Science Software)
For a multi tool with a really low learning curve, you'll be
hard pressed to find another program with such value as
Toolkit. We've used it to develop examples for our education
programs and it serves us well with simple self explanatory
straight forward graphics.
Figure 9. Adapted screen shots from the Heat, Air and
Moisture Tool Kit:outputs are simple self explanatory and
NRC-IRC hygIRC-1-D: helps design community
choose optimal building envelope components and systems
this program several years ago and though it is
easy to use, it does take some time to learn the navigation
through the various screens. The tool comes with a weather
database with 30 to 40 years of hourly weather data for 25 North
American cities and a material database containing the
hygrothermal properties of 80 common construction materials.
It does both steady state and transient analysis and has been
tested against various benchmarks for its accuracy. As noted by
NRC, "Situations involving air leakage, water leaks, and gravity
are, however, still best handled using the two-dimensional
version of hygIRC." Great information guys but where
can we obtain the 2-D version online? The 1-D version verdict: a very
good tool, lots of research papers available on its use but not free like
the WUFI program.
Figure 10. Screen shot from the NRC-IRC
hygIRC-1-D tool. Relatively easy to use for steady state
and transient analysis.
PC-Program for calculating the coupled heat and moisture
transfer in building components
This is a "go
to tool" for many building scientist and one of the few that
has formal training offered through such noted experts from
Building Science Corporation. Like the NRC-IRC hygIRC-1-D tool
it takes some time to learn the navigation but once you get it
figured it out it is relatively easy to use...and the best part
is it's price of free for a special "light" version. For the
pro version you'll have
to open up the wallet.
Figure 11. Screen shot of the WUFI program,
relatively easy to use and offered in a free light version.
For additional support visit our