According to the National Electric Code (NEC) a plenum is a "compartment or chamber to which one or more air ducts are connected and [which] forms part of the air distribution system." In other words, the open space above your ceiling extends above other rooms in the same building or is open to ducts that connect it to other parts of the building. In a plenum ceiling air can circulate through the air ducts to the whole building.

Most four-year American colleges and universities, as well as prep schools, have extra long beds that require specially sized sheets and bedding. If your student's school has 78-83 inch mattresses (standard mattresses are 75 inches), it can be difficult to find sheets that fit. All our bedding is custom designed to fit residence hall mattresses and maximize your student's comfort.

Vanishing Twin Syndrome occurs when one of a set of twin fetuses apparently disappears from the womb during pregnancy, usually resulting in a normal singleton pregnancy.

The Twin Cities (Minneapolis-St. Paul) is consistently rated as one of the top 10 places in the country in which to live. Minnesota has excellent public schools and one of the highest high school graduation rates in the United States. Minnesotans are an "outdoors people" who relish our "theater of seasons." Recreational, cultural, and social opportunities abound.

Plenum cable has a metal sheath inside that meets required wiring code for permanent installation. If you were to make a projector a permanent part of a conference room, for example, you would choose cable with plenum. Non-plenum cable is suitable for temporary installations.

All of our UL listed standard Ty-Rap brand cable ties are plenum rated. This includes the colored ties. The black weather resistant ties are not listed for plenum applications. The Catamount brand ties are not listed for plenum applications.

You most certainly can have plenum installed if you wish. The NEC does not require it though, so the decision is really up to you. Just remember that Plenum is more costly to install than PVC.

Our large suites feature king or queen-sized beds but are large enough to accommodate a very comfortable roll away bed.

Yes. Halar ties have the same UL listing as standard ties. Halar material is low-smoke and has good chemical resistance.

The Twin-Ray has two bulbs. First is the bulb you see at the end of this pen, which is the red light shining at about 635 nanometers. Behind this bulb is an Infrared lamp which produces a white light which you cannot see as it is putting out a light at 960 nanometers which is above the human eye range. These lamps are connected in series so if you see the red light you know that they both are operating properly. If either should burn out the instrument would not light at all.

Miyazawa is a famous writer in Japan, and Takahata and Miyazaki loves his works. There are several things that were taken from Miyazawa's works in Pom Poko. Gauche the Cellist is a Miyazawa story directed by Takahata.

Imagine mitosis. Now imagine it getting almost all the way done before stopping. Now imagine having to share all your Christmas gifts until you're 24. It's more like the last thing than the other things.

Plenum rated cable is required for jobs where cable is going to be run in return air space. In most buildings this area is above drop ceilings or under raised floors. The materials required to pass plenum standards are much more expensive than non-plenum-rated designs.

Yes, the power packs' low voltage wiring is suitable for use in Plenum ceilings. Install power packs in approved electrical enclosures. Install in accordance with state, local and national electrical codes. Yes! The NEC has stated that Class 1 and Class 2 wires can occupy the same enclosure as long as the rating of the wires equal or exceed the maximum circuit rating. The power pack wiring is rated 600V for the Class one wires and 300V for the Class two wires. See NEC section 300-3(c).

The Phoenix newspaper lists intergroup phone numbers for nearly every flavor 12-step group in the Twin Cities. Go to their website.

Normally you should hold the Twin-Ray about ? to 1 inch away from the skin and paint the light slowly back and forth for fifteen to twenty minutes per session. In many cases we have seen good results using it this manner two to three times a day. Some engineers feel the Twin-ray penetrates the body about 2 ? inches. The light is not considered dangerous to the eyes but it should not be placed in an area where children may pick it up and play with it either.

Meditation on Twin Hearts for Psychological Health and Well-Being is an exceptional meditation technique for spiritual development and psychological healing. Following Meditation on Twin Hearts, a tremendous amount of divine energy descends to the meditator flooding him with divine light. This Electric Violet and Luminous White Light energy can be used for psychological healing by directing it into specific energy centers or chakras of the body responsible for psychological health.

Observers in relative motion have different perceptions of the rate at which time flows. The theory of relativity explains time dilation. Time dilation, Time slowing as v->c, Twin paradox explained, Special theory of relativity, Deriving the Lorentz Factor.

Heterotopic pregnancy is the term used to describe a condition where there is the co-existence of an intrauterine pregnancy with an ectopic pregnancy. People who do suffer a heterotopic pregnancy often worry that there is very little written about the condition or its management, but this is largely because the condition is treated no differently to a singleton ectopic pregnancy.