First, thank you for hosting/supporting such a forum - even if I could do a decent job at googleing, I don't think I'd come up with this much info.
That said. two WTF's? I saw just today.
As I am looking for a 'fixer' house, you can guess most of the stuff. Until today, the most creative thing taken by the previous owner was the brick facade from one wreck. Refers, ranges, dishwashers, the occasional water heater - normal.
How about a missing heat pump? Of course the lines were not capped (30 year old house). I assume the entire system can be written off, and the best I could do would be to remove the rest, and save the HVAC tech the trouble - correct?
What was this rig? Largest box read Teledyne LAARS - a rectangular box, slightly smaller than an under-counter fridge, with the notation "Dual Temperature Control" above two dials I assumed to be rheostats. From this was a 1 1/2" pipe going to a stainless steel (NSF, no less) tank (think largish fire extinguisher) (empty), and from it to a serious-looking centrifugal pump, then into a 2" PVC heading underground toward the back of the house, Also present, a 2" PVC coming to from the ground up to a
small plastic tank fitted with a loose cap. My google indicates pool heater, but, unless the deck was hiding something, there was no pool, and no concrete deck for/from a pool. There was a separate unit which I'm guessing was a stand-alone A/C unit - much smaller than any heat pump I've seen.
Could this be hot water heat, and, if so, why the 2" PVC running parallel to the house, instead of a line directly into it (presumably in copper?)?
While I'm here, two misc. items:
1. Aside from being appalled that HVAC compressors are wet designs (oil in the lines for lubrication), the idea of casting copper lines in a slab is shoddy (IMHO) - does anybody bother installing conduits for these so that:
1. the copper doesn't get etched/eeaten by the concrete.
2. replacing lines becomes MUCH simpler?.
One last Q, also re lines. In the discussion as to replace/clean/how, one poster noted that the left-over lines from one job was often enough to replace another aet "assuming they were properly capped". Ummm...
WHAT is them that requires them to be capped?