Online educational resource on achieving indoor environmental quality with radiant based HVAC systems
Not for profit educational resource on indoor environmental quality.
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design a home radiant heating system

We don't inhale comfort we sense it through our skin...yet 99.99% of all thermostats exclusively measure air temperature and fail to measure what we experience.

Expecting even the most expensive 'retail' thermostat to compete with thousands of skin sensors which measure radiant, conductive and evaporative losses is...well just plain silly!


Thermal Ambassador: Skin Sensors vs. Thermostats (click the image)
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Here's why the typical $20 thermostat is a very poor, barbaric, rudimentary ambassador for our body to the HVAC system.

There are literally tens of thousands of (appx. 166,000) thermal sensors embedded in your skin...think about that for a second...$20 bucks for a single thermostat which is supposed to be accurately telling the HVAC system what your 166,000 sensors are picking up...
does this make sense to you? It doesn't make sense to us either...but it's perfectly logical to most in the construction industry who want to heat the building.

We're totally against conditioning buildings - we're about conditioning your body - that's our #1 message, ...completely different.

If you really want indoor environmental quality you have to start thinking about your human physiology and put aside the building and HVAC system for a moment...

Words of Wisdom

"It was really nice to attend your seminar in Kingston. As always, very informative and very enjoyable. I was just reflecting on the 166,000 sensors embedded in the skin and when I looked up the list price for a floor sensor, it priced out at $51.00 each. That's a whopping $8,466,000 or $423,300 per sq. ft." Mike Lampkin

Mike's words makes you think about the value of your body's control system.

So how much did you want to budget for your HVAC system?

Click here to learn more.

New excerpt

We'll be soon expanding this page - in the meantime here's a new excerpt:

"The skin blood flow is controlled by the mechanisms of vasodilation and vasoconstriction that result in a higher or lower skin blood flow, respectively. The correlations depend on the mean skin temperature and on the core temperature. According to Smith (1991), a state of thermoneutrality exists when the core and mean skin temperatures are 36.8C and 33.7C, respectively. As the core temperature rises above its neutral value, vasodilation occurs and cardial output increases dramatically. Nearly 100% of this increase goes to the skin tissue. A state of maximum vasodilation is achieved when the core temperature reaches 37.2 C. At this state, the total skin blood flow rate may be as much as seven times its basal value. Between core temperatures of 36.8 C and 37.2 C, the skin blood flow follows the core temperature linearly. As mean skin temperature falls below its neutral value 33.7 C, vasoconstriction occurs. Skin blood flow and cardiac output decrease accordingly. At a state of maximum vasoconstriction when mean skin temperature falls to 10.7 C, the total skin blood flow rate may be as low as one eighth of its basal value (Smith 1991). Between skin temperatures of 33.7 C and 10.7 C the skin blood flow varies linearly with the skin temperature."
Source: Holopainen, R., A human thermal model for improved thermal comfort, Doctor of Science in Technology Thesis, Aalto University, VTT, December 2012


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