Mr Rex
Elite Member
- Joined
- Jan 12, 2004
- Professional Status
- Certified Residential Appraiser
- State
- North Carolina
Many of the ventless are built in. I'd guesstimate over 50% of installs in new construction and in retrofitting conventional fireplaces. They are 99% efficient without the added cost of venting. They are not allowed in all states from what I understand.
And I agree, a dual sided FP is 1 FP on "whichever" form you use. just my opinion