1. I see that a hearth should be vented at the rear. Should there also be ventilation in the front or sides to allow air in?
2. In one of the R-Value charts it says a ventilated air space of 1" has an R-value of 1.43. Does that mean that 2" has 2.86? And so on?
3. Trying to figure out how much r-value is gained by increasing the air space 3 or 4 inches over one inch air space.
4. Does r-value only increase if the air spaces are separated?
5. At what distance do you get no more benefit from extra distance?
Please bear with me, I'm still trying to learn.
Thanks
2. In one of the R-Value charts it says a ventilated air space of 1" has an R-value of 1.43. Does that mean that 2" has 2.86? And so on?
3. Trying to figure out how much r-value is gained by increasing the air space 3 or 4 inches over one inch air space.
4. Does r-value only increase if the air spaces are separated?
5. At what distance do you get no more benefit from extra distance?
Please bear with me, I'm still trying to learn.
Thanks