One last thought attic ventilation is not there to get rid of heat it is there to get rid of excess moisture accumulating from the home.
Vent ducting in attic.
Ridge vent must me installed per the manufactures instructions.
Your vent hood will have places available for either attic or wall exhaust.
Installation of this type of attic ventilation involves leaving a gap in the sheathing along the ridge and covering it with a perforated vent.
Condensation can be a problem in an uninsulated attic so the homeowners trades resource center recommends installing rigid pipe with a minimum slope of 1 8 inch per foot toward the vent outlet to keep water away from the fan.
Rafter vents or.
The answer is rafter venting.
Cover the hole that you are not using for exhaust and secure the hood to its final positioning to mark the location of the vent duct.
What i ve observed attic temp 50c vent temp 21c attic temp 37c vent temp 18c attic temp 25c vent temp 13c not sure what the r value off flexible duct or main metal duct is.
Attic venting process to choose the proper ventilation system for your attic you ll first need to know the total area of your attic.
I live in montreal and had a lennox air conditioner and ducts installed in the attic.
Otherwise moisture will build up and you can face possible mold problems in your attic.
Step 2 run the ducts.
Doing so would fill your attic with.
Your attic has vents for a reason.
When these ducts are exposed to exterior air the plastic jacket never gets cold enough to permit condensation because the hot attic air keeps the plastic jacket warm.
Best ventilation is open soffit venting to a open vented ridge vent.
It can do both.
Soffit vents these are vents installed on the bottom side of the eaves in your attic.
Once you have it marked remove the hood and cut a hole in the wall or ceiling.
There is no thermal foam reflector barrier at all although i do have 2 whirly birds and 2 new passive vents to help move the air out of the attic the 2 passive vents have resulted in a dramatic cool down in the attic after the sunsets which is nice i know this based on my power consumption.
The ducts for the upstairs unit are in this attic.
The most common cause for this is inadequate ventilation in your attic.
Most attic ducts are insulated flex ducts that is flex ducts with r 6 or r 8 fiberglass insulation along with an exterior polyethylene jacket.
The international residential code allows you to run a dryer vent through the attic but you can t terminate it there.
I was wondering is there any figures on the expected energy temp lose.
In some localities the building department may require the use of r 3 to r 8 fiberglass pipe insulation to control condensation and even when it isn t required it s.
