A hybrid ventilator is one that offers BOTH free gravity air flow and optional powered air flow.
This web page is about my invention, the Invisco Tornado brand hybrid rooftop – I first learned about hybrid rooftops when I learned about the ECOPOWER hybrid that was created by CSR Edmonds in Australia (now Bradford). The engineers were determined to craft the best free air flow so for powered air flow they added a small motor under the turbine rain hat to turn the turbine to add powered flow. I requested that they add a larger motor and a blade because their first design would not pull air in a static pressure over 0.11 inches of water. They declined to make that change. I decided to improve their design and make the improved model here in America. Here are pictures of their design and my improvement. In the picture below note that the Edmonds design is not one of my inventions. The motor and blade are my improvement to the Edmonds design.
The result is a line of rooftops ranging in size from 10 inches diameter throat up to 36 inches that, when powered, pull from a few hundred CFM up to 14,000. And the air flow at higher static pressures is impressive – 11,578 CFM at 0.2 static pressure.
Below is a visual presentation of the incredible performance difference between the old rooftops made by American companies compared to the new higher performance available in the Invisco Tornado. Loren Cook was the original pioneer in the rooftop business who installed his first rooftop in 1942! He and others in America embraced the idea of a box top for a rain shield. In fact, LorenCook company engineers were the ones who decided to radius the top of the throat so the air would go over the top and down more smoothly.
Here is one specification that shows the 36 inch diameter model.
PRICING
Here is the most important fact about prices – Invisco’s overhead is so much lower than LorenCook’s or Greenheck’s that you can tell your interested customers that we will be lower in price than any other source in dollars per CFM. As an example, Loren Cook makes a 24 inch fan , direct drive, 3/4 HP motor and it sells for $3,500. Our price for the same perrormance is $2800.
Here is what happened after my first meeting with James Shwe of MarokoShwe.com – James embraced the hybrid rooftop concept and immediately put it in the 8 locations he had for rooftop ventilators in his design for a new gymnasium in Studio City, a suburb of Los Angeles. Below is the City’s graphic of the project. When it was first designed it had Edmonds hybrid rooftops and later when I improved on their design with far superior specs the Los Angeles engineering department removed Edmonds and left Invisco as the sole source. This is an excellent example of the impact Invisco sales representatives can have.
Here is another very useful case study – the University of Washington’s Molecular Engineering building in Seattle. See https://edmondsusa.com/case-studies/washington/
FOR NEW UPDATES ON THESE UNIQUE ROOFTOPS BE SURE TO SEND YOUR NAME AND EMAIL TO ME VIA kurtsinvisco@gmail.com