Take the square footage of house under roof X .48 divide this number by 20 (for V-600 products), by 17 (for V-400E or X-5) or by 13.5 (for V-300 or Fold-A-Vent products) this will give the lineal feet of product needed to meet a 1/150 vent ratio. If you are only going for a 1/300 (code minimum) vent ratio divide the above result by two. REMEMBER there MUST be an equal amount of soffit vent (in NFVA) to balance the ridge vent.

The ridge vent should not be used with other roof mounted or gable end vents. They can disrupt the air flow through the attic. A properly setup ridge/soffit vent system does not need to have power roof vents to help move hot air out of the attic. Whole house fans work great with a ridge/soffit vent system. We do not consider them the same thing as the power roof vents.

Ridge venting is one of the many ways to vent a roof. Depending on your roof type, it may be the most efficient way. (Contact us for an evaluation of your roof) Ridge venting works by cutting a continuous slot at the peak of your roof to provide a consistent area for air to exhaust from your attic space. Some ridge vents are warranted against leaking, and failure for the duration of the roof system. Many of the vents are the shingle over type.

A balanced system of intake and exhaust airflow through the attic is the best way to create effective, year-round ventilation. Thus, in addition to installing ridge vents, which act as exhaust vents, be sure your attic has intake vents in the soffit/eaves. To ensure a balanced ventilation system, match the amount of net free area the ridge vent provides with as much, or more, intake area.

Kilns have been operated for years without the newer ventilation systems. Without a vent typically the kiln is vented by propping the lid during the first part of the cycle when the ware gives off fumes. However, a powered downdraft type of vent, like the Vent-Sure that L&L makes, automates this process and improves air circulation and heat distribution in the kiln as well as insures good venting of the fumes to the outside. You MUST be sure to vent fumes generated by a kiln to the outside.

Do not use small diameter, long vent lines. Use the rule of thumb of the next nominal pipe size every 10 feet (6,1 meters) of vent line and 3 feet (0,91 meters) of vent line for every elbow in the line.

A balanced system of intake and exhaust airflow through the attic is the best way to create effective, year-round ventilation. Thus, in addition to installing ridge vents, which act as exhaust vents, be sure your attic has intake vents in the soffit/eaves. To ensure a balanced ventilation system, match the amount of net free area the ridge vent provides with as much, or more, intake area.

With an unbaffled ridge vent, wind and other elements can blow directly in through the ridge vent. Air entering the vent can create pressure in the attic, which prevents air and moisture from being pulled out. Also, stronger winds can actually pass through one side of the vent and out the other, which also prevents air and moisture from escaping the attic. Tests show that externally baffled vents outperform unbaffled ridge vents. Back to the top

V-400E, V-300, Fold-A-Vent and the X-5 Ridge Vents are all recommended to be used with shingles, slate or flat tile on hip roofs. Note: over-all roof pitch should be at least 4/12 and caulking under the vent is recommended. With heavy weight shingles the hip application would be the same as with a slate or flat tile roof. (Click here for PDF detail)

With an unbaffled ridge vent, wind and other elements can blow directly in through the ridge vent. Air entering the vent can create pressure in the attic, which prevents air and moisture from being pulled out. Also, stronger winds can actually pass through one side of the vent and out the other, which also prevents air and moisture from escaping the attic. Tests show that externally baffled vents outperform unbaffled ridge vents. Back to the top

You can never have enough! The same advice people give for PC processor speed can be given for bandwidth: buy as much as you can reasonably afford, since nobody ever has "too much" bandwidth. One of the main factors though, is price.

Simply decide what height at which you need to stand. You may need to measure this as you want to be accurate and guessing isn't the best way to figure this. This is generally referred to as the "platform height." We quote all our packages with the platform height listed. This is the actual, or very close to, height your feet will be located. "Working height" is usually figured by adding 6 ft to the platform height.

After the loss of a tooth, the bone formerly around the tooth is resorbed - often leaving a very narrow ridge of bone. In order to place an implant, the ridge of bone is split as though it were a piece of corrugated cardboard being expanded to provide a wider space between each side. For the upper jaw, this is accomplished at the same time that the implant is placed; the lower jaw requires a second surgical visit approximately three weeks later.

You need to have the event "Listed". You begin this process by creating an account so you can log into the system if you don't already have one. (See "What does it mean to create an account?" for more details). If this is a new account you need to go to the main menu and click on the "Update Personal Information" button and fill in your contact information (email addresses, postal address, and phone numbers) so we will know how to contact you. Next, you need to have your event "listed".

The Initiative will be working with Internet Service Providers and community groups to ensure that this information is available when the network is up and running.

Yes. The exhaust of a ventilated Sterilizer may be routed through a vent hood if it is a dedicated exhaust type. ...top>

Yes, for any outputs over 5kw rating. It doesn’t matter whether it is a large or small room or whether the room has gaps around, doors, windows or trickle vents e.t.c as it must have a dedicated, permanently open air vent over 5kws.

The Rhodesian Ridgeback's ancestry includes a dog native to Southern Africa--a dog that originally was discovered to have been domesticated by the Hotenetot tribes of the region. Early settlers described a dog living with the aboriginal tribes as having a "peculiar section of hair running in the opposite direction along the back".

When the roof pitch is 35 degrees and above, or when the building is 10 metres wide or more, then BS 5250 recommends the use of ridge ventilation combined with eaves ventilation. This actually provides a much more efficient system because air passing over the ridge will draw fresh air into the eaves. When there is just eaves ventilation there needs to be enough wind to force air in through one side of the building and out through the other.

The Crossfire Discussion forum regularly polls its members about the figure scales used. The summary is: