What is it

[NJinspector]

When the client booked the inspection, he had never seen this type of heating system. Said the heating unit was outdoor with the a/c unit. Right away, i think heat pump. This is not a heat pump (i think), what is it? How does it work? Anyone have some info I can pass on to the client?

thanks in advance

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[Neal Lewis]

Jason,

That's gas pack heating/air con unit. The label probably says it's for natural gas. See the gas line? The exhaust is right under the gas shut off valve. Is that flexible gas connector rated for exterior use?

[Brian G]

Down here we just call 'em "package units". They can be heat pumps or gas heat with AC. They're actually getting a little more popular these days, because all the noise is outside.

Brian G.

One-Stop HVAC Inspecting [:-magnify

[Richard Moore]

Not seen anything like that. So...I assume that ductwork is split into supply and return air. Filter(s) at the interior return grills or is that the reason for the odd "tent" shape? Is that enough exposed ductwork to be concerned about insulation or is it double-walled?

One last question and I promise to shut up...Does that lower section also contain the emergency heat strips?

[hausdok]

Hi Richard,

Think combo gas furnace and AC unit mounted on the roof of a commercial building and it's essentially the same thing. I've done about a dozen of those on various commercial buildings and in one case on the roof of a high end condo. They're not much different than an ordinary gas furnace only they're placed outside and they don't require a chimney.

ONE TEAM - ONE FIGHT!!!

Mike

[Brad Manor]

They're pretty common around here on houses without basements.

-Brad

[Brian G]

Originally posted by Richard Moore

So...I assume that ductwork is split into supply and return air.

Correct.

Filter(s) at the interior return grills or is that the reason for the odd "tent" shape?

Correct again about the typical filter location, but I have no idea what that tent shape is.

Is that enough exposed ductwork to be concerned about insulation or is it double-walled?

Around here it would just be insulated inside. I'm sure that may vary in other regions.

One last question and I promise to shut up...Does that lower section also contain the emergency heat strips?

I've not seen a two-tiered unit before, but normally there would be no emergency heat strips in a gas unit.

Brian G.

Strip Heat - When the Dancer Is Really Fine [-crzwom][:-dev3]

[msteger]

Can't say I've ever seen a system like that either.

[Jim Katen]

Originally posted by msteger

Can't say I've ever seen a system like that either.

You've seen hundreds on the top of commercial buildings.

- Jim Katen, Oregon