Gas, venting and the permit in Mount Holly
A tankless conversion is a permit job without exception, because it changes the fuel routing, the venting, or both. In Mount Holly that goes through Gaston County for inspections and every trade permit, and we pull it rather than working around it.
Three things decide whether the install is straightforward or not:
- Gas line capacity. The single most common reason a tankless quote comes in higher than expected. We size the line to the real load rather than assuming the existing one will do.
- Venting. Condensing units need their own sealed venting and a condensate route. Where the old tank vented into a shared flue, that flue may now be oversized for whatever is left on it.
- Where it goes. Predominantly garage and closet installs in the post-2000 subdivisions, with crawlspace work in the older riverside core.

What Mount Holly itself changes
The housing in Mount Holly
Mount Holly is newer than the Gaston County average and newer than Mecklenburg, which surprises people who expect the whole county to be old housing. 49.1% of the stock has been built since 2000 and the median value sits at $337,800. Writing this market off as aging housing stock, the way a lot of Gaston County content does, gets it wrong.
The pipe era
Copper and PEX in the bulk of the stock given the post-2000 build dates. A polybutylene layer in the smaller 1980s and 1990s portion, and older supply only in the historic core.