Water heater pan & indirect waste pipe

[Bryant]

So a water heater is installed in a conditioned crawl space.
the question is, will a pan and indirect waste line (to a receptor or exterior) be required?

The IRC/VRC 2801.6 says where water leakage will cause damage.
I take damage to be structure as has always been interpreted. But thinking outside the box, with a conditioned crawl space that communicates with the rest of the house, have to wonder what kind of damage would occur for example; the occupants leave for a 2 week vacation and the water spills its guts and the water keeps flowing and ponding up on the vapor barrier, (if done to the code, short of a pool liner in the crawl space) where it gets drawn in to the HVAC system and all thru the house. The occupants come back home and there are beads of water vapor on the walls , the carpet is damp and so on and so forth, is this damage ?

Thanks in advance

 

[mtlogcabin]

We do not allow water heaters in a crawl space since 2009.
How does a water heater installed in a crawl space meet the followings requirements?

IRC P2803.6.1 Requirements for discharge pipe.
The discharge piping serving a pressure-relief valve, temperature-relief valve or combination valve shall:
1. Not be directly connected to the drainage system.
2. Discharge through an air gap located in the same room as the water heater.
3. Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap.
4. Serve a single relief device and shall not connect to piping serving any other relief device or equipment.
5. Discharge to the floor, to the pan serving the water heater or storage tank, to a waste receptor or to the outdoors.
6. Discharge in a manner that does not cause personal injury or structural damage.
7. Discharge to a termination point that is readily observable by the building occupants.
8. Not be trapped.
9. Be installed to flow by gravity.
10. Not terminate more than 6 inches (152 mm) above the floor or waste receptor.
11. Not have a threaded connection at the end of the piping.
12. Not have valves or tee fittings.
13. Be constructed of those materials listed in Section P2904.5 or materials tested, rated and approved for such use in accordance with ASME A112.4.1.

 

[ADAguy]

Use to call those California basements with water heaters and gravity furnaces down there.