Welcome to the site. Of course the rules state we cannot help you work on or install your own equipment, however we can give recommendations on equipment, etc. If you do the install yourself and have questions on what to do....don't look here, because we cannot give DIY help.
There is alot more than electrical knowledge needed to install heating and air.
Good luck....and again, welcome.
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The statement below is my signature and just my overall feeling towards our industry and does not necessarily pertain to you nor this thread.
There really isn't a legitimate excuse for not doing the job correctly!