Ventless Roof System

Ductless mini split systems including ductless air conditioners and ductless heat pumps are a flexible and efficient option to heat or cool your home.

Ventless roof system.

Ventless commercial hoods are self contained compact portable units that provide you with another way to vent grease laden vapors. Unvented roof assemblies such as conditioned attics and unvented cathedral ceilings are becoming common in north american construction. Rooms that aren t being used regularly can be turned off to save energy. In an un vented roof foam can serve as the air barrier and vapor retarder and prevent moisture from getting in to the roof cavities.

These assemblies are created by eliminating ventilation openings and moving the thermal moisture and air control boundaries to the plane of the roof deck. A properly functioning un vented roof. For such constructions the principles and benefits of unvented attic construction are similar to that occurring in a single family residence. The majority of ventless dryers sold in the u s however are condenser dryers which don t exhaust air.

This type of hood eliminates the need for any expensive roof modifications because they don t require roof fans or ductwork. A ductless mini split system on the other hand uses an individual fan and evaporator unit for each room. Requires no roof fans no ductwork no hood to hang. It s most often used in a situation where a window ac unit or baseboard heating would be considered such as a new addition to a house.

Requirements for unvented attic assemblies are provided in section 0806 4 of the international residential code 2009 irc. Unvented roof systems can be safely used in many different climates. Click to learn more. The pros of a ductless system a ductless heat pump or air conditioner typically consists of a wall mounted indoor unit combined with an outside compressor.

Foam and the roof assembly foam insulation can play an important role in both vented and un vented roof assemblies. Instead a dead space exists between the roof system and the top floor ceiling typically comprising of an acoustic tile system and no roof ventilation is provided. Instead they use a dual loop airflow system that s much more efficient. In cold climates insulating sheathing must be added exterior to the roof sheathing to prevent condensation on the underside of the roof sheathing.

Perfect for older homes without ductwork renovations and additions sunrooms garages or to help with hot and cold spots.