For startups and charging. SH and SC. Only one guy at work has em and he isnt even EPA certified. He has the Fieldpiece dual temp thingy. Its plastic though and I dont really dig that. Seems to work good though. Id like to go Digicool or Testo. Dual probe.
What do you prefer.... Im still doing research. Leaning Testo or Digi and not Fieldpiece. Testo had the hard case. Digi seems to be great. Maybe the AK900?