uninsulated pex in attic

Mike J.

The lines were run by the plumber and the ductwork. A/C, and air handler were done by the HVAC guy.

The duct work is insulated but I noticed that when the air first starts there is cold air coming out for about the first thirty seconds before it turns warm.

Any thoughts?

bob_65

insulating pex

my contractor just finished piping my hydro air units and he didnt insulate the piping in the attic should i be concerned

Bob Forand

I would

I would have them insulated.

Bob Forand

I would

I would have them insulated.

Matt_21

you should have

him add glycol to the system. even if you insulate the lines in the attic you still have a chance of freezing the lines if there isn't constant circulation through them.

Mike J.

What is best way?

I have the same issue but I am concerned
about heat loss. I have anti-freeze.

What is the best way to insulate the lines?
Mine are fastened to the floor.

Mike

Joel_3

pex

if he didn't insulate those lines did he properly seal all the ductwork leaks ? i'd be more worried about that as those ducts are OUTSIDE and if they leak they will introduce significant cold air to the house much more than you'll loose from the pipe . Just today we tore most of the ducts out of a4yold house and threw them in the trash . We tested her house and ductwork and her hydro air system was about 40% eff even though her boiler was 82% . The gods live in the ducts my son.

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Constantin

I'd insulate the underside of the roof deck...

... and be done with it. Seal the vents, make it a ventless roof and subsequently worry a lot less about duct losses, etc. See the research at buildingscience.com for further thoughts on this. Duct wrap and the like are notoriously ineffective, as duct systems have been regularly measured with duct losses of 10%-20%. Due to all the heat losses up there, your "cold roof" won't be cold at all, will drive up heating and cooling costs, etc.

I have an air handler, a electrostatic cleaner, and parts of the fire sprinkler system in the "attic" of our home, where they stay warm and happy in the winter and cool and happy during the summer because they're inside the conditioned space. Meanwhile, I have been in more than one attic with a "cold roof", insulated AC systems, and broken condensate lines because the furnaces/ACs were not properly winterized before winter.

Joel_3

?

Sure it's got wrap on it but are the ducts sealed under the wrap ??? Pull it back at the joints and see.

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Ted_9

unconditioned space/

You should be more concerned with your hvac equipment being installed in unconditioned space. It happens all of the time, but its not right, IMO.

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