[Equest-users] Solartube (Tubular Daylighting System)

Mathew Higgins higgins at edi-arch.com
Fri Dec 12 10:10:37 PST 2008

Kosuke - I haven't seen that you've received a response, but I regularly 
simulate Solartube skylights without a hitch. A couple of things I keep 
in mind when doing so are...

- Making sure to convert the rounded area of the tube to a square dimension
- Ensuring that the tube depth (or light well) extends below a drop 
ceiling or equivalent attic

- Assigning the appropriate space with the daylight sensor(s)
- Making sure that the correct number of sensors and corresponding 
daylight area (ratio) per sensor is accounted for
- Additionally, ensuring that the appropriate foot-candle level, 
location, rotation, and control strategy are input for sensors


Matthew Higgins, LEED AP
Technical Specialist
Environmental Dynamics, Inc.
Architecture and Sustainability Consulting Services

Any data provided by the Consultant, verbal or written, are to be considered opinions of building energy and/or daylight performance. The Client understands that the Consultant has no control of occupant habits, equipment or material performance or characteristics, site or climate conditions or the Contractor's method of assembly, and that the Consultant's opinions regarding building energy/daylight performance are made on the basis of the Consultant's professional judgment and experience. The Consultant makes no warranty, express or implied, that the energy/daylight performance of the building will not vary from the Consultant's opinion of building energy/daylight performance.

Kosuke wrote:

> Does anybody have any experience using Solartube (Tubular Daylighting 
> System) in EQuest?  On Equest 3-61e, I was able to pick Tubular 
> Daylighting system, but software crashed all the time.  Now I got 
> Equest 3-63. It seems to be more stable than previous version.  Does 
> this tubular daylighting system actually dim artificial lighting 
> according to accommodate foot candle set point inside of room? Did 
> anybody experienced a problem with tubular daylighting system?
> Kosuke Kato, LEED AP
> CMTA Consulting Engineers, Inc.
> Louisville - Lexington KY
> Lou. 502 326 3085
> Lex. 859 253 0892
> kosuke at cmtaegrs.com <mailto:kosuke at cmtaegrs.com>
> www.cmtaegrs.com <blocked::http://www.cmtaegrs.com/>
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