The electrical-code math, run honestly · NEC 220.82 · CEC 8-200
Don't pay for a $5,000 panel upgrade on someone's gut feel.
Installers quote panel upgrades without running the load calculation. We run the actual code method on your home in two minutes — and when the numbers say you don't need the upgrade, we say so.
Free · No signup · Runs in your browser · 80% continuous-limit rule applied the way an inspector applies it
limit100 A
service
116 A
demand
24 A
heat pump
36 A
over limit
Free panel capacity check
2 minutes · no signupHeat pump first, EV charger optional. Pick your country and the right code method is applied automatically.
Only used to pick the right rebate programs. It never leaves your browser — we keep just the province or state.
Baseboards, electric furnace. 0 if gas or none.
Central AC nameplate. 0 if none.
Industry-average compressor draw. Not sure? 3 ton suits most homes.
No email. No signup. The math runs right here in your browser — we keep only anonymous regional statistics, never your details.
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Enter your home's loads and run the check. You'll get the same pass/fail math a licensed electrician starts with — in seconds.
Two questions decide every heat pump install
in this orderCan your panel take it?
The two-minute load calculation — heat pump first, EV charger optional. PASS, WARN, or FAIL against your service's 80% continuous limit, before anyone quotes you an upgrade.
Run the panel check →FREE · full report with electrician worksheet $25 CAD
Is it worth the switch?
A year of your energy bills becomes a measured thermal signature. We size a real cold-climate unit against Environment Canada weather for your address and price the switch at the rate you'd actually pay — or tell you to keep your furnace.
Get your heat pump ROI →FREE FINDINGS · full sizing + payback report $25 CAD
Includes verified BC rebates — CleanBC up to $16,000, FortisBC $5,000, BC Hydro $4,000 · checked 2026-08-02
Why the math has to be run
129 A
One make-up air unit missing from a building's load calc for 11 years. That's a ghost load.
$2–5k
Typical panel-upgrade quote — often issued without the calculation that justifies it.
$16k
Top verified BC rebate ceiling right now — with the programs that ended quietly removed. Checked Aug 2, 2026.
Built by a tradesperson, not a marketing team
RED SEAL ×2
Refrigeration Mechanic · Plumber
Class A Gas Fitter
Built and reviewed by a Red Seal Refrigeration Mechanic · Red Seal Plumber · Class A Gas Fitter with 25+ years of commercial and industrial HVAC/R experience across Western Canada. The calculators run the code methods directly — the same demand factors, thresholds, and continuous-limit rule an electrician applies.
NEC 220.82 (2023) · CEC Rule 8-200 (26th Ed.) · ASHRAE Guideline 14 · NEEP ccASHP · ECCC station data
The full report — $25 CAD
The free check gives you the verdict. The full report shows the work: every load, every demand factor, and what to do about the result — a decision page for you, a worksheet page for your electrician. So you can sit across from an installer knowing exactly where the numbers came from.
- — Line-by-line code calculation, cited by rule
- — Upgrade vs. load-management scenarios, with costs
- — EV charger headroom analysis
- — Questions to ask your electrician
- — PDF you can hand to your installer
30-day money-back guarantee — if the report doesn't help, reply to your receipt for a full refund.
If the data can't support an answer, we refuse to give one.
No fabricated sizing. No blended-rate savings math. No rebates that ended last year. When your inputs can't produce a defensible number, the engine tells you exactly what data would fix it — because a wrong answer costs you five figures.
Read the methodologyCommon questions
Is the panel check really free?+
Yes. The calculator runs the full NEC 220.82 (US) or CEC Rule 8-200 (Canada) optional-method math in your browser and gives you a PASS / WARN / FAIL verdict with your headline numbers — free, no email, no signup. The paid report adds the line-by-line breakdown, upgrade scenarios, and a PDF you can hand to your electrician.
Can a 100A panel handle a heat pump?+
Often, yes — it depends on your existing loads, not the panel label. A 100A home with a gas range, gas water heater, and gas dryer frequently has room. An all-electric 100A home usually does not, especially with an EV charger. The calculator totals your real loads, applies the code demand factors, and compares against your service’s 80% continuous limit — the same first step a licensed electrician takes.
What is a ghost load?+
A ghost load is a real electrical load that draws current but never made it into the load calculation — a forgotten baseboard heater, an unpermitted hot tub, a radiant floor nobody documented. Ghost loads are why panels that look fine on paper trip on the coldest night of the year, and why an incomplete load list produces a wrong answer.
Does this replace an electrician’s load calculation?+
No. It runs the same optional-method math an electrician uses for a first-pass estimate, but from the loads you enter rather than an on-site inspection. Use it to walk into quotes informed. The official calculation, permit, and installation all require a licensed electrician.
Does it work for EV chargers too?+
Yes. Add a Level 2 charger as an optional load and the calculation includes it at nameplate — or excludes it if you have an energy management system (EVEMS), exactly as NEC 220.82 and CEC Rule 8-106(11) allow.
Planning the rest of your heat pump project? Our sister site HeatPumpLocator.com covers rebates, costs, sizing, and how to hire a contractor.