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Old 03-06-2012, 06:20 PM   #1
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Conclusion to: Can I install an HVAC unit myself


I posted a thread a while back concerning whether it would be possible to install 2 HVAC units myself, unfortunately the thread got offtopic a bit and was closed:
Can I install an HVAC unit myself?

Everyone wanted to know how well it turned out so I decided to post this thread to say that everything went well. It took 4 guys about 5 hours to finish up everything, they came back the following monday to seal everything up with mastic.

I suppose it wasnt a bad price considering all the work they did, about $6,600 for everything, plus they sold me the insulation for my ducts at wholesale price and let me borrow their stapler so that I could do it myself. They also let me keep my old units, which had about $300 worth of copper and scrap in them.

Both units have been running for about a week now with no problems. Ill post some pics later if anyone wants to see.

Thanks again for all the information you guys provided.

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Old 03-06-2012, 06:33 PM   #2
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Conclusion to: Can I install an HVAC unit myself


Thank you for the update.

Pics are always a welcomed addition to a project update.

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Old 03-06-2012, 07:32 PM   #3
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Conclusion to: Can I install an HVAC unit myself


Yeah! We dig pics!
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Old 03-07-2012, 03:28 PM   #4
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Conclusion to: Can I install an HVAC unit myself





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Old 03-07-2012, 03:52 PM   #5
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Conclusion to: Can I install an HVAC unit myself


Looks good..very neat

..may i suggest a rigid support on each gas line half way to wall?

And I think a drain trap on each unit would be good too.

The union and tee should be painted with a rust proof black paint.
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Old 03-07-2012, 05:23 PM   #6
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Conclusion to: Can I install an HVAC unit myself


In addition to the above there's supposed to be a gas shut off valve within 3' of where the gas pipe goes in the unit. Also looks like the service disconnect doesn't have the required 30" of clear space in front of it. Both would get a denial on an inspection here,as would no trap on the condensate line. Can't tell for sure but the duct doesn't look insulated either.
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Old 03-07-2012, 07:04 PM   #7
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Conclusion to: Can I install an HVAC unit myself


There is a gas shutoff but its closer to the wall, cant really see it from the pics. Ill get the support, drain traps, and paint next time I head to the store but I dont want to mess with the disconnect.

Does the duct need to be insulated on the outside of house? I didnt know they made exterior insulation for it. Should I also insulate the return ducts going back to each unit? Ive already insulated everything else but those.
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Old 03-07-2012, 07:43 PM   #8
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Conclusion to: Can I install an HVAC unit myself


Did u use a galvanized union on the right side unit?
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Old 03-08-2012, 05:42 AM   #9
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Conclusion to: Can I install an HVAC unit myself


Nice job for a layman, of course I like them kind of jobs also very easy and cut and dry in and out.
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Old 03-08-2012, 08:54 AM   #10
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Conclusion to: Can I install an HVAC unit myself


Never have seen a picture of a packaged unit before and wondered what the 2 sheet metal (look like vents) were. Are they inlets for combustion air by any chance?
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Old 03-08-2012, 01:31 PM   #11
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Conclusion to: Can I install an HVAC unit myself


Both unions are rusty so I guess they arent galvanized. Ill just scrape off the rust and paint them, should be good enough. Not getting an inspection, which is part of why the deal was so cheap Im guessing.

Im not an HVAC expert so im not sure about the 2 sheet metal things. I think theyre exhaust vents for the gas heaters. When you put the heat on hot air comes out, but im not sure why theres 2 of them. One might be an inlet like you said.
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Old 03-08-2012, 03:48 PM   #12
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Just hit the union with some WD 40 and wipe it down...apply a little grease to keep moisture off.

Hit the rust tees and elbows with Rustoleum..no need to scrape.
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Old 03-08-2012, 05:09 PM   #13
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Conclusion to: Can I install an HVAC unit myself


Quote:
Originally Posted by veesubotee View Post
Never have seen a picture of a packaged unit before and wondered what the 2 sheet metal (look like vents) were. Are they inlets for combustion air by any chance?
One is combustion air intake, and the other is the flue gas exhaust.
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Old 03-09-2012, 09:06 AM   #14
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Conclusion to: Can I install an HVAC unit myself


If certain people wouldnt have scared the OP on his other thread about installing his own units, he could have tackled the job himself. The thread was confusing though because half of the replys were for changing out split equipment, a lot of confusion!
It looks like the sheet metal in these pics matched right up to the new units, made for an easy changeout. The job looks pretty good, I do prefer however to run the thermostat wire in sealtite, as there is a 1/2" knockout provided on the unit for that.
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Old 03-09-2012, 09:08 AM   #15
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Conclusion to: Can I install an HVAC unit myself


Quote:
Originally Posted by beenthere View Post
One is combustion air intake, and the other is the flue gas exhaust.
They used to come painted, dont know why Goodman quit doing it, looked nicer when they matched the unit.

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