Heating Element Glossary
The terms you'll run into when speccing or replacing a heating element — explained in plain language, with links to the right calculator or page. Not sure which one you need? Send us the details and we'll match it.
Electrical basics
- Voltage (volts, V)
- The electrical 'pressure' supplied to an element. Heating elements are rated for a specific voltage (commonly 120 V, 208 V, or 240 V in Canada). Running an element at the wrong voltage changes its heat output and can shorten its life.
- Current (amps, A)
- The rate of electrical flow through an element. Amperage determines the wire size and breaker rating a circuit needs, so it matters for safe installation.
- Resistance (ohms, Ω)
- The element's opposition to current flow — and the property that turns electricity into heat. Measuring resistance with a multimeter is the quickest way to tell whether an element is good or failed.
- Wattage (watts, W / kW)
- How much heat an element produces. Wattage is set by the combination of voltage and resistance, and is often the headline spec for a replacement (e.g. a 5 kW heat strip).
- Watt density
- The wattage spread over an element's surface area (watts per square inch/cm). Higher watt density means a hotter surface and faster wear — a key factor when custom-building an element for a given application.
Materials & construction
- Nichrome
- A nickel-chromium alloy widely used for heating-element wire. It handles repeated heating well and resists oxidation, making it common in HVAC and lower-temperature elements.
- Kanthal (FeCrAl)
- An iron-chromium-aluminum alloy that tolerates higher temperatures than nichrome, which is why it's favoured for kiln elements. The trade name 'Kanthal' is often used generically for this wire family.
- Coiled element
- Resistance wire wound into a spring-like coil to pack more length (and heat) into a compact space. Most kiln elements and many HVAC elements are coiled, then stretched to a specified length on installation.
- Sheathed / tubular element
- A heating wire enclosed in a metal tube and packed with insulating powder. The sheath protects the wire and spreads heat — common in duct heaters, water heaters, and many appliance elements.
- Wire gauge
- The thickness of the resistance wire. Gauge affects an element's resistance, watt density, and lifespan, so a correct replacement matches the original wire diameter as well as its dimensions.
HVAC & heat pumps
- Heat strip
- An electric heating element assembly installed in an air handler or electric furnace. Heat strips provide primary heat in electric furnaces and backup heat in heat pump systems.
- Auxiliary heat
- The backup electric heat a heat pump switches on when it can't keep up with demand on a cold day. It runs alongside the heat pump to top up the heat output.
- Emergency heat
- A mode that bypasses the heat pump and heats entirely with the electric elements — used if the heat pump fails. It's less efficient, so it's meant for emergencies, not everyday heating.
- Sequencer
- A control that switches heat-strip elements on and off in stages, so they don't all energize at once. A failed sequencer can mimic a failed element, so it's worth checking first.
- Air handler
- The indoor unit that circulates air and houses the heat-strip elements in a heat pump or electric-heat system. Replacement element kits are matched to the air handler's model.
Kilns
- Element holder
- A ceramic groove or holder that cradles a kiln's coiled element. Some kilns use simple brick grooves; others (like L&L) use hard ceramic holders that protect the element and extend its life.
- Cone (firing)
- A pyrometric cone measures the heat-work a kiln has done — a combination of temperature and time. Kilns and elements are rated to reach specific cones, so a replacement must match your firing range.
- Pinning
- Using staples or pins to hold a kiln element in its groove, common on corners or sagging sections. Proper pinning keeps the coil seated so it heats evenly and lasts longer.
- Element sag
- When a kiln coil loosens and droops out of its groove with age and heat cycling. Sagging elements heat unevenly and can short against the kiln, and usually signal it's time to replace them.
Buying & fit
- Data plate
- The label on your equipment (or the old element) listing the model number, voltage, and wattage. It's the single most useful thing to send us — it lets us confirm the exact replacement.
- OEM vs aftermarket
- OEM means the original-equipment-manufacturer part; aftermarket means a compatible part built to the same spec. A correctly specced aftermarket element fits and performs the same, often at a lower cost.
- Single-phase vs three-phase
- How power is delivered to the equipment. Homes are usually single-phase; many commercial kilns and large HVAC units are three-phase. The replacement element must match your supply, since it changes the wiring and ratings.
Have your specs? Get a quote.
Send your model number, a photo of the old element's data plate, or the wattage and voltage — we'll confirm the exact replacement and ship it across Canada.
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