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HVAC
Calculate total refrigerant charge from line length and factory charge.
Open Refrig ChargeHVAC
Reference for unit heaters: gas-fired, electric, hot water, and steam types.
Open Unit HeaterYour specific task is calculate total refrigerant charge from line length and factory charge. Open the page, drop your input, get the result — typically under a second.
Your goal is reference for unit heaters: gas-fired, electric, hot water, and steam types. Same approach: paste in, get the result, move on. No account, no upload.
Both tools live in the same category, so the choice depends on the exact subtask. Refrig Charge focuses on calculate total refrigerant charge from line length and factory charge; Unit Heater focuses on reference for unit heaters: gas-fired, electric, hot water, and steam types. Try whichever description matches your goal more closely — they're both free.
Yes — both tools are free for unlimited personal use. The Pro plan unlocks higher limits and batch features but the core functionality stays free forever.
Absolutely. Many users chain multiple tools together — process a file with one, then feed the result into another. Nothing is uploaded, so chaining is essentially instant.
No. Both Refrig Charge and Unit Heater work without signup. We only ask for an email if you decide to subscribe to a paid plan.