HVR attic unit-no Safety drip pan below?

[JPLomeo]

I'm starting to see HRV (Heat Recovery Ventilators) units installed in attics with only two, clear PVC drain lines coming out of them ( I assume a primary and and secondary drain) but no Safety drip pan below the unit? Here in AZ our climate is mostly dry but during summer Monsoon rains I bet those HRV's get a work out removing moisture. Would it not be a best practice to have a drain pan under them in case of leaks from the condensation removal system?

Thanks a bunch

JP

[Jim Katen]

Do they not have a water level monitoring device that shuts them down if the drains fail? 

[JPLomeo]

Jim,

I have no idea. I disclaim them as not part of the inspection and often cannot even get near them, but seems to me that any water condensing unit located above a finished ceiling should be additionally equipped with a pan (and drain pipe) under it. Monitoring devices or cut off switches can and do malfunction-then you got water damage.

[Jim Katen]

It's a good point. I've seen lots of them here and I can't recall ever seeing one with a pan under the unit. I've never seen one leaking - but that's probably because nearly every one that I see has stopped working.