Kanopi 2000W PTC greenhouse heater with digital thermostat and probe
Sized for the coldest night: 2000W, about a third more heat than a typical 1500W heater
How cold can it get outside: in a single-glazed 8x10 greenhouse held at 45°F, a typical 1500W heater holds down to 31°F outside and the Kanopi 2000W to 26°F, on paper
No flame, no fuel, no refills: 2000W, PTC ceramic, about 6,800 BTU/hr, digital thermostat, plant-height probe, tilting stand
Not just for the greenhouse: the Kanopi heater in a greenhouse, a garage workshop and a home office
Kanopi 2000W PTC heater from the side: matte black drum, carry handle and orange tilting stand
Kanopi digital thermostat on a greenhouse post reading 45°F, with its probe clipped among seedlings at plant height
Kanopi 2000W heater glowing in a frosted greenhouse at night, with the digital thermostat on the bench
Line drawing of the Kanopi 2000W PTC greenhouse heater and thermostat: round drum body with carry handle, ringed grille over the PTC ceramic element, tilt knobs, orange cradle stand, and a separate thermostat reading 45°F with its probe at plant height.
Illustrative image: a glass greenhouse at dusk with the Kanopi heater, a matte black round drum in a low orange tubular cradle, glowing on the floor beside benches of seedlings and potted citrus.
Illustrative image: frost patterns on greenhouse glass on a cold night, with the Kanopi heater, a black drum in an orange cradle, glowing inside among citrus, orchids and seedlings.

Illustrative images. Final product may differ.

2000W PTC heater · Digital thermostat

Kanopi 2000W PTC Heater with Digital Thermostat for Greenhouse, Garage and Workshop

  • 2000W of PTC heat (about 6,800 BTU/hr)
  • Digital thermostat with a plant-height probe
  • No flame, no fumes, no fuel
  • For greenhouses, garages and workshops
2000WPTC heat
6,800BTU/hrAbout, on paper
PTCCeramic element
LCDDigital thermostat
ProbeAt plant height
ZEROFlame or fuel

$149.95$119.95

Needs a dedicated 240V circuit, fitted by an electrician.

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What's in the box
  • Kanopi 2000W PTC heater: matte black drum on a tilting orange cradle stand, with a carry handle
  • Digital thermostat controller with probe

Final contents are still being confirmed.

How to use it
  1. Place it on a firm, level floor with clear space all around, away from plants, trays, fleece and anything that can fall on it.
  2. Clip the probe at plant height and set your temperature on the thermostat.
  3. The thermostat holds it: heat on below your number, off above it.
Power: dedicated 240V circuit

2000W is more than a standard 120V/15A household outlet supplies (at most about 1,800W), so it requires a dedicated 240V circuit, fitted by an electrician, never a shared outlet. Greenhouse, garage and outbuilding circuits need GFCI protection.

The Coldest-Hour Ceiling

Why it works

A thermostat can't hold a number your heater can't reach. Kanopi is sized for the coldest hour.

Kanopi 2000W heater glowing in a frosted greenhouse at night, with the digital thermostat on the bench
01 The Coldest-Hour Ceiling

A thermostat is a switch, not an engine. Every heater has a top speed. When heat loss outruns it, the thermostat can only leave it switched on. Not bad luck, and not you.

Around sunrise on a clear, still night, the outside air hits its low. With 18°F outside, a typical 1500W heater in a single-glazed 8x10 settles at about 33°F on the bench, on paper.

See the sizing table

02 The Reserve Hold

Size the heat for the coldest hour of your winter, then let the thermostat hold it back for every other hour. Kanopi gives about 6,800 BTU/hr against about 5,100 for a typical 1500W heater: about a third more reserve for the coldest hour, on paper. On mild nights the spare watts just mean shorter on-cycles.

03 Not just for the greenhouse

The same heater keeps you warm all winter, wherever the cold gets in: the garage and workshop, the shed, studio and home office, the basement, sunroom and spare room. Set the temperature you want on the digital thermostat and it holds it.

It has a carry handle and a tilting stand, so it goes where the cold is. No flame, no fumes, no fuel to refill. Needs a dedicated 240V circuit, fitted by an electrician.

In the greenhouse

See it work

Kanopi 2000W heater glowing in a frosted greenhouse at night, with the digital thermostat on the bench Frosted greenhouse, heater on
Kanopi digital thermostat on a greenhouse post reading 45°F, with its probe clipped among seedlings at plant height Thermostat and probe
Kanopi 2000W PTC heater from the side: matte black drum, carry handle and orange tilting stand Tilting stand, carry handle
Kanopi 2000W PTC greenhouse heater with digital thermostat and probe Heater and thermostat

Who it's for

Built for the nights that matter

If your heater lost power, more watts won't help. This is for the nights it ran and still lost.

  • Greenhouse growers

    You keep a set point through winter in a small hobby greenhouse, and you want heat that still has some left at 4 AM.

    • 6x8 to 8x12
    • Single or twin-wall
    • Overnight set point

  • Citrus and orchid collectors

    Tender plants that took years to grow. One night under the line is the night that matters.

    • Citrus
    • Orchids
    • Tender collections

  • Seed starters

    Trays on the bench in early spring, when a late frost can undo weeks of work. The probe reads the air where the seedlings are.

    • Seed trays
    • Late frosts
    • Bench height

  • Garage and workshop

    Take the chill off before you start work, and keep a cold room comfortable through the worst of winter.

    • Garage
    • Workshop
    • 240V circuit

How it works

Three steps to a held set point

  1. Kanopi 2000W PTC heater from the side: matte black drum, carry handle and orange tilting stand

    Step 1: Place it on the floor with clearance.

    Stand it on a firm, level floor, clear of plants, trays, fleece and anything that can fall on it.

    Illustrative image. Final product may differ.

  2. Kanopi digital thermostat on a greenhouse post reading 45°F, with its probe clipped among seedlings at plant height

    Step 2: Clip the probe at plant height and set your temperature.

    The probe reads the air where your plants are, not up by the roof or down by the heater.

    Illustrative image. Final product may differ.

  3. Kanopi 2000W heater glowing in a frosted greenhouse at night, with the digital thermostat on the bench

    Step 3: The thermostat holds it.

    Heat comes on below your number and goes off above it, all night, with reserve left for the coldest hour.

    Illustrative image. Final product may differ.

Keep clear space around the heater on all sides. Requires a dedicated 240V circuit, fitted by an electrician. A standard 120V household outlet supplies at most about 1,800W. Greenhouse, garage and outbuilding circuits need GFCI protection.

The overnight log

Your first night

One winter night in a single-glazed 8x10, on paper.

  1. Dusk

    Set the number.

    Clip the probe at plant height, set 45°F and go inside.

    • 5:40 PM
    • Set 45°F

  2. Bedtime

    Heater on.

    The heater is on. The thermostat says 45°F. The forecast is cold, but you've seen cold before, and most nights this is enough.

    • 10:30 PM
    • Set 45°F
    • Heater on

  3. 4:30 AM

    The coldest hour.

    With 18°F outside, a typical 1500W heater settles at about 33°F on the bench. It's running flat out and it can't do more.

    • 4:30 AM
    • 1500W
    • Bench about 33°F

  4. Sunrise

    Sunrise, held.

    With 2000W, the same night ends at about 37°F on the bench: frost-free, on paper.

    • 7:12 AM
    • 2000W
    • Bench about 37°F

How Kanopi compares

More heat for the coldest hour. No flame, no fuel.

Kanopi 2000WA typical 1500W heaterPropane heater
Heat output✓ 2000W, about 6,800 BTU/hr1500W, about 5,100 BTU/hrVaries
Holds 45°F in a single-glazed 8x10 down to✓ About 26°F outsideAbout 31°F outside–
Flame or fumes✓ No✓ No✗ Yes
Fuel refills✓ No✓ No✗ Yes
Thermostat probe at plant height✓ YesVaries✗ No
Runs on a standard 120V outlet✗ No, needs a dedicated 240V circuit✓ YesNot applicable

Heat figures are on paper, from the standard heat-loss formula. Sources: University of Arizona CEAC; John Bartok Jr., UConn; US EIA; UW-Madison (links in the sizing table below).

By the numbers

Why Kanopi?

2000WPTC ceramic heatAbout a third more heat than a typical 1500W heater, on paper.
6,800BTU/hr, aboutAgainst about 5,100 for a typical 1500W heater, on paper.
ProbeAt plant heightThe thermostat reads the air where your plants are.

What's in the box

Everything you need to hold a set point

  • Kanopi 2000W PTC greenhouse heater with digital thermostat and probe
    1x

    Kanopi 2000W PTC heater

    Matte black drum on a tilting orange cradle stand, with a carry handle.

  • Kanopi digital thermostat on a greenhouse post reading 45°F, with its probe clipped among seedlings at plant height
    1x

    Digital thermostat controller with probe

    LCD controller and probe cable that reads the air at plant height.

Sizing, on paper

How cold a night can each heater hold?

The outside temperature each heater can hold your set point down to, by greenhouse. Check your coldest night against your greenhouse.

Heat needed (BTU/hr) = surface area x U x (inside - outside). U = 1.2 single glass or poly, about 0.7 twin-wall.

How cold a night can each heater hold?. Each cell: a typical 1500W heater / Kanopi 2000W, outside temperature, on paper.
Greenhouse Holds 45°F down to about Holds 35°F down to about
6x8 single 25 / 18°F 15 / 8°F
8x10 single 31 / 26°F 21 / 16°F
8x12 single 32 / 28°F 22 / 18°F
8x10 twin-wall 20 / 12°F 10 / 2°F
8x12 twin-wall 23 / 16°F 13 / 6°F

Each cell: a typical 1500W heater / Kanopi 2000W, outside temperature, on paper.

FAQ

Frequently asked questions

I already have a heater with a thermostat. Why would I need this?

Good. It holds until heat loss passes its ceiling. On paper, in a single-glazed 8x10, a typical 1500W heater lifts about 15°F and 2000W about 19°F. On an 18°F night that's about 33°F against about 37°F inside. Check your watts against your coldest night.

Will it work on my power?

2000W is more than a standard 120V/15A household outlet supplies (at most about 1,800W), so it requires a dedicated 240V circuit, fitted by an electrician, never a shared outlet. Greenhouse, garage and outbuilding circuits need GFCI protection.

Can I use it outside the greenhouse?

Yes. It's a portable 2000W heater with a digital thermostat, so it works in a garage, workshop, shed, basement or home office all winter long. The same power note applies: it needs a dedicated 240V circuit, fitted by an electrician.

Which greenhouses is it sized for?

On paper, 2000W holds 45°F on a 20°F night in a single-glazed 6x8 or a twin-wall 8x10 or 8x12. In a single-glazed 8x10 or 8x12, treat it as a frost-free (35°F) heater, not a 45°F one: it holds 35°F down to about 16°F and 18°F outside.

Will a bigger heater cost more to run?

On mild nights it uses about the same energy as any heater holding the same number. It just runs shorter cycles. On the coldest nights it uses more, because it is actually holding your number where a smaller heater would have lost ground.

What about safety listings?

PTC ceramic heating means no flame and no fuel. Safety features and listings are still being confirmed, and we won't claim one until it is.

What can't it do?

It can't fix a power cut or stop a tripped breaker, so keep your backup and your alarm. It still has a ceiling: on a hard enough night 2000W runs flat out. And every heat figure here is a calculation by the standard heat-loss formula, not a test result.

The Reserve Hold

Sunrise, held.

Size the heat for the coldest hour of your winter, then let the thermostat hold it back for every other hour.

  • 2000W PTC heat
  • Digital thermostat with probe
  • No flame, no fuel
  • Carry handle, tilting stand
Get the Kanopi 2000W heater Read the questions

2000W requires a dedicated 240V circuit, fitted by an electrician.