BobGa
Member
Speaking with Studor they have a Maxi-Filtra eliminating a need for any thru roof vent.
It over rides the code for a minimum of one vent.
With the advent of air tight designs (like passive & solar) not wanting any unnecessary air infiltration and fittings in the roof it is now being approved after this case in Oregon.
take a quick read
"This project is being designed and built to Passive House standards and requires an extremely airtight envelope to achieve this level of energy efficiency. Reducing the number of envelope penetrations is critical in achieving the required level of air tightness. In addition, avoiding penetrations that allow ambient airflow through the building will help reduce the heating load in the winter, and eliminating roof penetrations will provide greater protection against water intrusion. The Studor “Maxi-Filtra” is designed and tested for this application."
They are helping us design 2-1/2 bath 2 story build with no standard vents at all.
Pretty interesting stuff, I"ll report back as it progresses if anyone is interested.
It over rides the code for a minimum of one vent.
With the advent of air tight designs (like passive & solar) not wanting any unnecessary air infiltration and fittings in the roof it is now being approved after this case in Oregon.
take a quick read
"This project is being designed and built to Passive House standards and requires an extremely airtight envelope to achieve this level of energy efficiency. Reducing the number of envelope penetrations is critical in achieving the required level of air tightness. In addition, avoiding penetrations that allow ambient airflow through the building will help reduce the heating load in the winter, and eliminating roof penetrations will provide greater protection against water intrusion. The Studor “Maxi-Filtra” is designed and tested for this application."
They are helping us design 2-1/2 bath 2 story build with no standard vents at all.
Pretty interesting stuff, I"ll report back as it progresses if anyone is interested.