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It would be cheaper using R22 than R12.

I have a R12 air condition system and plan to replace this expensive freon with R22. It is a 5H60 compressor direct. What's factors should I look for. More advice, the better.
The owner want me to...

thanks,

I often got asked and don't know

I sometimes got asked "is that a non-bleeding TXV or bleeding TXV?". What is that non and bleed means and how the valve are different in connection?

Thank you

Could someone help me explain the difference between none-bleeding expansion valve and bleeding expansion valve and how are they connected differently?

Thanks

what is SEER and where do they come up with that number?

What is SEER? Where do they come up with that number?