HVAC tool storage setup: tool bag, modular stack, or both

Short answer: for most service work, run both. Carry a bag for the every-call kit, because you can take it up a ladder with one hand free. Put the heavy, bulky gear (vacuum pump, recovery machine, cordless tools, batteries) in a rolling stack that stays on the ground or at the van. Then give gauges and hoses a padded spot of their own.

The bag-versus-stack argument never ends because both sides are right about something. A bag is lighter, softer and goes anywhere. A stack keeps things sorted, protects fragile gear and rolls. HVAC work happens on roofs, in attics, in crawlspaces and in mechanical rooms, so the answer depends on which of those you see most.

Bag, stack or both

A sensible starting point: if you mostly run service calls, a bag plus a small stack. If you mostly install, and stage a lot of gear in one place for the day, lean harder on the stack.

What goes in the bag

The bag is the every-call kit. If you need it on most calls and it is light, it goes in the bag.

• Multimeter with clamp, and a non-contact voltage tester
• Screwdrivers or a multi-bit driver, nut drivers, hex keys
• Pliers, cutters, strippers, a small adjustable wrench
• Flashlight and headlamp
• Thermometer or temperature clamps
• A few common small parts you use on most calls
• Gloves and eye protection

Keep the bag light enough that you can climb with it and still have a hand for the ladder. If you need a second hand to carry it, it is too heavy.

What goes in the stack

The stack carries what is heavy, bulky or only needed on some calls.

Measure your vacuum pump and recovery machine before you buy storage for them. Some will not fit in a standard lid box, and that is fine: let them ride on their own and keep the stack for what fits.

Gauges and hoses

Gauges are where a careless setup costs you. Analog or digital, they do not like being knocked around.

• Padded and separate. A padded case, a foam-lined box or a drawer with nothing sharp or heavy in it.
• Cap the hoses. Keep dirt and moisture out of hoses and fittings. Coil hoses loosely; do not kink them to make them fit.
• Out of the sun. A dash or a dark box in summer gets hot. Follow the gauge maker’s instructions for storage temperature, calibration and care.
• Check seals. Hose gaskets and core tools wear. Keep spares in an organizer bin and check them during the weekly reset.

Refrigerant tools, briefly

This is general information, not a procedure. Follow your training, your employer’s procedures, the equipment maker’s instructions and the code that applies to the job.

• Keep recovery and evacuation gear together. Recovery machine, recovery cylinder, vacuum pump, micron gauge, core tools and hoses in one place means you do not start a recovery and find the cylinder adapter is in the shop.
• Check ratings for the refrigerants you work on. As the industry moves to lower-GWP refrigerants, more equipment uses lower-flammability (A2L) refrigerants. EPA notes that widespread use of A2L refrigerants may require additional training for service technicians, and that recovery machines or equipment rated for A2L refrigerants may be needed.Label in the drawer notes which tools are rated for what, so nobody grabs the wrong one.
• Cylinders do not go in closed tool boxes. Secure them upright, away from heat and direct sun, and follow the cylinder label, the safety data sheet and your employer’s transport rules.
• Buying refrigerant. EPA’s sales restriction says only Section 608 certified technicians can buy refrigerants intended for stationary equipment; employers of certified technicians can also buy with written proof.Keep a copy of your card somewhere you can find it, not just in the glovebox.

The ladder-day kit

Some days are all roof or all attic. On those days, pack the bag for the day and leave the stack at the van:

1. Meter, tester and the hand tools you will need at the unit.
2. The parts you expect to replace, plus one spare.
3. Water, gloves, eye protection, headlamp.
4. A small bucket or pouch to raise and lower anything that does not fit in the bag.

If you are making three trips up the ladder for tools, rebuild the bag. If the bag is too heavy to climb with, split it.

Hybrid setups that work

• Bag on top of the stack. Some modular systems include bags with a molded base that latches to the rest of the system; Milwaukee, for example, lists PACKOUT tool bags that connect to other PACKOUT components.Check fit before you buy; do not assume a bag from one system latches to another.
• Two bags, one stack. An electrical and controls bag and a refrigerant bag, with the stack holding the heavy gear and parts.
• Stack in the van, bag in the hand. The stack never leaves the van. You restock the bag from it between calls.

The weekly reset

1. Restock parts in the organizers and the bag.
2. Charge every battery.
3. Check hoses, gaskets and caps.
4. Check the vacuum pump oil and follow the maker’s change schedule.
5. Check the meter works on a known source.
6. Update your stack and tool record if anything moved or got replaced.

Keep the record

Gauges, recovery machines, vacuum pumps and meters are expensive and easy to carry off. Record serial numbers and photograph serial plates while the drawers are open. The tool theft inventory guide covers what to record, and the free inventory template has the fields. For drawer layout ideas, see the sample stacks or how electricians set up a service-work stack.

Questions