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my name is Bruce and I work with VELUX. I would like to provide you with some insights into our SUN TUNNEL skylight products. The reflectivity of the tunnel material used by Solatube is 99% reflective, while the tunnel material used by VELUX is 98% reflective (rigid tunnels). However, the VELUX tunnel comes with a 20-year warranty that it will remain ...


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When I first read this, my first instinct was "don't", and I think that still holds. You are mixing water, electricity and possibly natural gas in a single untested design, and if anything goes wrong your pool could drain out, you could get electrocuted going in the water, or you could even end up with a bomb. It's not worth whatever costs you'd save ...


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You can solar heat the primary loop with high temp evac tubes in principle but what happens is you mess up the control of the return temperature which is critical for the operation of the condensing boiler. Preheating the tap water is the better approach because you are heating the water before the boiler loop tops it off. This doesn't affect the existing ...


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After quite some research I have come to the conclusion that almost all heating systems that work with solar heating only work well in combination with radiant floor heating. Radiant floor heating works with much lower temperatures than standard central heating systems with radiators in each room. Another difference is that floor heating does not modulate ...


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Melissa is right, the reflectance of the tube is essential, especially over longer distances. You can also choose to compare products based on other important energy factors such as heat output during summer (Solar Heat Gain Co-Efficient) and heat loss during winter (U-Factor). I believe both companies, Velux & Solatuve have figures available for their ...


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Solatube Daylighting Systems come in 2 sizes, the 160 DS (10" in diameter) and the 290 DS (14"). The 160 DS produces up to 4600 lumens, while the 290 DS produces up to 9100 lumens. I have no idea what any other brand's lumen output is however, you will most always get more light with a Solatube brand due the fact that their tubing is made with Spectralight ...


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The Solatube Dome is a big diffuser and diffuses the light before it enters the tube. I have personally tested their dome and a clear dome. The clear dome allows more light to enter the tube. When light hits a prism on a dome like Solatubes it actually blocks light. They obtained the technology from Sun Star when they bought them out 15 years ago. This ...


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I have personally installed both of these products on many occasions. I can tell first hand that the completely clear dome provided by Velux drastically reduces light input on cloudy days. the Solatube is actually contoured to redirect light which makes a huge difference. I also have noticed how the Solatube seems to produce a way more natural lighting ...


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There's no difference as your question is worded. The sun rises in the east and sets in the west, so half the day it will be on one side, and half the day it will be on the other. Consider timing how long the sun is hitting each roof since there could be obstructions, a slight angle north or south, or other factor we can't help with here. Note that the sun ...


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If your doing the work yourself its only your time you wasting but if your paying someone then its your money. Flashing for solar tubes is not that bad just an oversized plumbing vent. If your roof is in bad condition it could be a project because the shingles will break apart if they are too old a brittle. You May need to buy a bundle of shingles to ...


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The bigger the skylight and the clearer the glazing, the more light. In your climate you are likely to lose more heat by conduction than you gain by radiation. You will need to get a skylight with insulating glazing of some sort. This reduces heat lost by conduction but still allows almost as much gain by radiation. The best solar gain is had by orienting ...


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Personally, I think a large factor is that the VELUX tubes will visually fit in with VELUX windows. The VELUX tubes will also make people think you can afford a loft extension – hopefully this is not a factor for you. I don’t think there is that much to choose between the two leaning makes, but a lot of cheaper options give a lot less light. (Also ...


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Not only are the Solatube daylighting systems brighter than anything else on the market comparable in size, they also don't let in any UV light or heat, and the combined light spectrum they do transmit into your room is whiter. There is no lumens measurement, as the position and external light sources vary, but in optimum conditions, the 160DS will put ...



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