heat recovery wheels

supertek65

sure have been seeing alot of heat recovery wheels lately!
i wonder how efficient they are, seems like they could hold alot of germs!

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high superheat never killed a compressor!

RoBoTeq

I've been dealing with air to air recovery wheels and other media since the 1980s. I've not seen any issues with germs. If the filters are properly maintained, there shouldn't even be any dust or other dirty contaminants.

One thing is for certain, there would be more contaminants on the air out side then on the air in side.

supertek65

i have heard that they have been around a while!

i have only started seeing them here in the last uh uh uh
5 years

__________________
high superheat never killed a compressor!

RoBoTeq

They were not very popular when I was installing them decades ago, and for good reason. They were expensive and prone to problems. I had many problems with the first Honeywell Perfect Window units I installed. They had a flimsy band and pulley system operating the wheel that the long band on the thing kept breaking or coming off of the pulley's.

supertek65

the aaon i just put in has both a sensible and latent wheel!
pretty cool
run of the mill molecular sieves, alumina and silca gel ,adsorbing dessicants!
blah blah blah!

__________________
high superheat never killed a compressor!

milk man

Seems like the one at a school I take care of doesn't work too well. It's for the lunch room and a lot of cold air comes in when it's really cold outside.

Is there a problem with that or is it normal?

RoBoTeq

Sounds to me like there is a problem. Is there a negative pressure in the lunch room that could be pulling more air in then the unit is taking out?

milk man

Could be I'll shut the exhausts off next time I have to deal with this issue.

KnightRider

they work pretty good. All the larger schools and buildings are putting them in here in GA. But here you exchange both sensible and latent heat since we are in a humid climate. It is SOP around here.