Pressure and temperature, superheat and subcooling, metering devices, furnaces, heat pumps, the EPA 608 rules: it all piles up at once. Here every topic fits on one page, with a drawing that does the explaining. 72 illustrated pages, from the refrigeration cycle to the EPA 608 practice questions.
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One topic per page, a drawing that carries it and short boxes with the steps and the numbers. Take a look inside:
You read about pressure, saturation, the high side, the low side, superheat... You look at the unit, at the gauges...
...and you can't picture where the refrigerant is or what it is doing.
Here, the whole cycle fits on one page: the compressor squeezes the vapor, the condenser gives up the heat outdoors and turns it into liquid, the metering device drops the pressure, the evaporator boils it and picks up heat from the indoor air.
Four parts, one loop, the same refrigerant changing state twice. Once you see it, the gauges start to make sense.
First you understand the cycle. The readings come with it.
How cooling works, the components, refrigerants and oils, tools and service, charging and diagnosis, heating and EPA 608 prep: 72 pages, all illustrated
Picture this:
Instead of adding refrigerant every time the suction pressure reads low, and hoping...
...you see how to tell a low charge from a restriction: both give low suction pressure and high superheat, but subcooling is low with a low charge and normal or high with a restriction.
And the refrigeration cycle, superheat, the furnace sequence and the EPA 608 rules become pictures you can redraw on the exam and on the job. You stop memorizing and start understanding.
That is exactly what HVAC Made Visual + EPA 608 does.
It is not “just another PDF”. It is 7 parts and 61 illustrated topics, with 28 original EPA 608 practice questions and explained answers, plus a two-page final review.
Because what your brain sees organized, it remembers.
Heat moving to cold, Btu and tons, sensible and latent heat, pressure and boiling point, the refrigeration cycle, and the high side and the low side.
The compressor and the condenser, piston, capillary tube, TXV and EEV, the evaporator and air handler, driers and service valves, the heat pump, contactor, capacitor, transformer and thermostat wires.
Refrigerant families, the refrigerants you will meet, safety groups A1 and A2L, blends and glide, compressor oils and working with A2L refrigerants.
Gauges and hoses, meters and temperature probes, brazing and pressure testing with nitrogen, evacuation with a micron gauge and finding leaks.
Airflow first, superheat and subcooling, charging piston and TXV systems, weighing in the charge, reading the symptoms, and the common faults from a low charge to a frozen coil and condensate drains.
Inside a gas furnace, the sequence of operation, ignition and flame sensing, safety switches, venting and CO, heat pump defrost, auxiliary heat and efficiency ratings.
Section 608 certification, ozone and the Montreal Protocol, venting, sales and records, recover, recycle and reclaim, cylinders, evacuation levels, Types I, II and III, two practice sets and the answers explained.
At the end, a two-page final review: the numbers to know and a quick diagnosis table.
Free with the book
Printable cards for the truck: a pressure-temperature chart, superheat and subcooling quick checks and the furnace sequence of operation, to check a reading in seconds.
It comes with the book.
Free with the book
Practice questions on the Core, Type I, Type II and Type III sections, with every answer explained, so you know why it is right and what to reread when you miss one.
It comes with the book.
One payment:
$27
Instant access: HVAC Made Visual + EPA 608 and the two free books arrive by email as PDFs. One payment, no subscription.
One topic per illustrated page to understand the refrigeration cycle, the components and the controls, and review them before your tests.
Superheat, subcooling, charging, capacitors, frozen coils: the why behind the readings you take every day.
The Core and Types I, II and III drawn clearly, with original practice questions and every answer explained.
$27
You have 30 days to try HVAC Made Visual + EPA 608 and the two free books.
If a file does not open, if the content is not what this page describes, if you were charged twice or the download never arrived, write to us and we refund you in full.
One payment, no subscription, no surprises.
Yes. It starts from how heat moves and builds up to charging, diagnosis and the EPA 608 one page at a time.
Yes. Part VII covers Section 608 certification, the rules, recovery, evacuation levels and Types I, II and III, with 28 original practice questions and the answers explained. The exam itself is given by EPA-approved certifying organizations.
Yes. There is a page on safety groups, A2L included, and a page on working with A2L refrigerants such as R-32 and R-454B.
By email, right after you buy: three PDFs you can read on your phone, tablet or computer.
No. One payment of $27, and the three PDFs are yours.
No. It is the illustrated material that goes with them: one topic per page, to understand it and review it. Your instructor, the manufacturer's installation manual and your local codes come first.
No. It is not affiliated with or endorsed by the EPA or any certifying organization. The EPA 608 exam is given by EPA-approved certifying organizations. The practice questions were written for this material.
Yes, as many times as you want, for yourself.
You have 30 days: if a file does not open, if the content is not what this page describes, if you were charged twice or the download never arrived, write to us and we refund you.
You do not have to reread the same chapter a fourth time hoping it sticks.
You do not have to memorize pressures and rules you cannot connect.
And you definitely do not have to stand at a unit with the gauges on and no idea what the readings are telling you.
There is an easier way. And it is one click away.
Your move.
The PDFs arrive by email in a few minutes