Radiant Heating from Healthy Heating. Radiant heating systems and infloor heating.


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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 Thermal Imaging

This site recommends FLIR as a reliable resource in building environmental diagnostic and building science / forensic tools.

Images shown were taken with FLIR cameras.

Bob Rohr was an early  thermography adapter for comfort research and education and is expanding its use in his contracting business. He was kind enough to send us this series of images to show site visitors different aspects of building science and radiant systems.

Bob is a past president of the Radiant Panel Association and big supporter of industry professionalism.

See more thermography

The Bob "Hot Rod" Rohr Project
Show Me Radiant Heat

Unless noted otherwise, photos are (c) copy written,2006 by Bob Rohr


 

Energy Emitted by a Black
Body versus Temperature

thermography for studying human physiology
Credit: DR. ARTHUR TUCKER/SPL
If children could write indoor specifications...

Heated concrete slab showing temperature profile at exterior walls. Notice the cold profile of the wall studs and window. Your warm body will radiant its energy to these colder surface and creates what humans call a chill.

Temperature Profile Index for Images Shown to the Left

Building performance has a major role on human comfort and energy efficiency. Shown here are the thermal faults at the intersection of walls and floor.

Above, conductive heat transfer plates in the shower walls is the ultimate in bathing comfort! Image - no more cold wall shock.

No point heating under appliances such as freezers or wine coolers. However if you are using radiant cooling you may want to put a separate heat sink loop under these areas to discharge sensible heat.

Temperature Profile Index for Images Shown to the Left

 

 

After a period of operation it gets more difficult to see where the radiant tubes are located as the heat spreads evenly out across the floor.

The use of heat transfer plates promotes greater conduction to the floor and thus higher surface temperatures resulting in greater radiant transfer. You can see the influence in this image as the first four feet of plated tube - from the window wall is at a higher temperature.

Ever wonder why it feels cold at doors or windows? This is a great image showing why. Infiltration and conductive losses

Here you can see the stairwell (upper right hand) and the sunlight shining through a window. Also note the thermal faults in the corner. Again, building envelope is the key to comfort and efficiency.


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