Glad to have you aboard...I think you will enjoy this site, I know I have.
Now that you have introduced yourself, try going to the residential HVAC section and start a thread there and ask your question. I am sure you will get some helpful responses.
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!