Not articles. Not theory. Checklists, charts, and guides built to be used on the job, fast, accurate, and always within reach.
Step-by-step diagnostic flow for residential and light commercial systems not producing cooling. Built to work through a fault systematically without missing a step.
Open Checklist →Full pressure-temperature chart for R-410A including liquid and vapor pressures, superheat targets, and subcooling targets. The chart you actually need on the job.
Open Chart →Every tool worth owning at every stage of your career. Tiered by experience level so you know exactly what to invest in next, and what can wait.
Open Guide →Enter your cost, amount charged, and markup percentage. Get the exact price to charge your customer with a full breakdown including your margin and per-pound rate.
Open Calculator →Standard hours and suggested price ranges for 50+ residential and commercial HVAC jobs. Enter your hourly rate and every price updates instantly.
Open Guide →150 essential HVAC and refrigeration terms every apprentice must know. Searchable, tabbed by category, with a free PDF download to keep in your bag.
Open Dictionary →Two professional Word documents ready to put your name on. Residential (2 visits/year) and commercial (4 visits/year, quarterly). Built for operators who need something they can hand to a customer today.
Get Templates →Step-by-step gas furnace diagnostic flow for no heat calls.
Full pressure-temperature reference for legacy R-22 systems still in the field.
Which refrigerants replace which, and what changes when you swap them.
What to check when a previous repair didn't hold. Systematic callback diagnosis.
Target ranges by system type, application, and ambient conditions.
Parts every tech should carry on their truck to avoid same-day return trips.