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BLACK+DECKER · Tankless water heatersBLACK+DECKER water heaters at AirGreenFour electric tankless water heaters from 18 to 36 kW, chosen with you for your water and your electrical panel, in Montréal, Laval, Longueuil, the South Shore and the North Shore.
The written warranty

Mon–Thu 8 a.m.–6 p.m., Fri 8 a.m.–4 p.m.

BLACK+DECKER · electric tankless water heaters · facts checked Oct. 14, 2026

BLACK+DECKER tankless water heaters: the right size depends on your cold water

Four sizes, from 18 to 36 kW at 240 V. A tankless heater warms water as it flows through: the colder the incoming water, the lower the hot-water flow. Move the slider to see the effect on each model.

See the four sizesRequest my free quote

Hot-water flow, model by model

Theoretical calculation
Outgoing water
Voltage
8.6 L/min2.3 gpm18 kW
11.5 L/min3.0 gpm24 kW
12.9 L/min3.4 gpm27 kW
17.2 L/min4.5 gpm36 kW
Flow in litres per minute (US gallons per minute below). Calculation: power from the manual ÷ (4.186 × temperature rise). Theoretical, with no losses; water pressure and the installation change the real flow.
18–36 kW
power at 240 V, four sizes
0.5 gpm
flow that starts the heater
30–50 °C
setting range in the manuals
7 years
against leaks, written warranty
AirGreen × BLACK+DECKER18 to 36 kW at 240 VStarts at 0.5 gpmSet to the degree, 30 to 50 °CWritten warranty: 7 years against leaksNo gas, no ventingMontréal · Laval · Longueuil · South Shore · North Shore
01 · The four sizes

Four power ratings, one look

The BD-18, BD-24, BD-27 and BD-36-DWH models. The figures come from the manufacturer’s manuals; the BLACK+DECKER brand is used under licence by the importer, Paragon Group USA.

BLACK+DECKER electric tankless water heater, front panel with temperature display
18 kWBD-18-DWHup to 75 A at 240 VFittings 1/2 in. NPTSee the product 24 kWBD-24-DWHup to 100 A at 240 VFittings 3/4 in. NPTSee the product 27 kWBD-27-DWHup to 112.5 A at 240 VFittings 3/4 in. NPTSee the product 36 kWBD-36-DWHup to 150 A at 240 VFittings 3/4 in. NPTSee the product
SpecificationBD-18-DWHBD-24-DWHBD-27-DWHBD-36-DWH
Power at 240 V18,000 W24,000 W27,000 W36,000 W
Maximum current75 A100 A112.5 A150 A
Water fittings1/2 in. NPT3/4 in. NPT3/4 in. NPT3/4 in. NPT
Dimensions15.52 × 4.48 × 13.9 in.18.74 × 4.53 × 14.76 in.18.74 × 4.53 × 14.76 in.23.23 × 4.53 × 14.77 in.
Weight9.21 lb12.17 lb12.17 lb16.23 lb
Advertised flow*3.7 gpm4.68 gpm5.3 gpm6.1 gpm

* Flow advertised on the manufacturer’s product pages (bdwaterheaters.com), with no temperature rise stated. For your own water, use the calculation at the top of the page.

02 · Voltage

At 208 V, the same heater delivers less heat

The manuals give the power at 240, 220 and 208 V. A heating element puts out less heat when the voltage drops: at 208 V, each model keeps about three quarters of its power. The actual voltage in your home is measured; an electrician confirms it.

Model240 V220 V208 V
BD-18-DWH18,000 W15,125 W 84%13,520 W 75%
BD-24-DWH24,000 W20,166 W 84%18,026 W 75%
BD-27-DWH27,000 W22,687 W 84%20,280 W 75%
BD-36-DWH36,000 W30,250 W 84%27,040 W 75%

Power ratings: BD-18, BD-24/27 and BD-36-DWH manuals. Percentages calculated by AirGreen from those ratings.

AirGreen × BLACK+DECKER

BLACK+DECKER’s heater, AirGreen’s right fit.

BLACK+DECKER, under licence with Paragon Group USA, designs the heater. AirGreen helps you pick the power that suits your water and your panel. Each does what it does best.

BLACK+DECKER

What BLACK+DECKER brings

  • Four power ratings18, 24, 27 and 36 kW at 240 V, according to the manufacturer’s manuals.
  • Starts at 0.5 gpmIt heats as soon as half a gallon per minute flows, and sets to the degree from 30 to 50 °C.
  • No gas, no ventingAn electric, wall-mounted heater, according to the manufacturer’s product pages.
  • 7 years against leaksAnd 2 years on defects, according to the written warranty document, on its terms.
AirGreen

What AirGreen brings

  • The size for your waterFlow changes with the incoming water and the voltage: we account for both with you.
  • Free quoteYour electrical service amperage and what the heater must supply: that is where it starts.
  • Programs checkedENERGY STAR, LogisVert, Hydro-Québec and the federal grant, read on 14 October 2026: no rebate for this type of heater.
  • RBQ 5645-9605-01Subclasses 15.8, 15.10 and 16.

The result: the right BLACK+DECKER heater for your water and your panel, chosen with you.

Calculate my flowRequest my free quote
03 · Your panel

Before the flow: the current

At full power, these heaters draw 75 to 150 A at 240 V. Pick a model and your home’s electrical service (printed on the main breaker) to see the share it takes.

Model

Home electrical service

The BD-27-DWH can draw 112.5 A, or 56% of a 200 A service.

This is not a load calculation

Heating, the range, the dryer and the rest of the house share the same panel. The load calculation, the breakers and the wire gauge are set by an electrician.

The BD-24/27 manual itself notes that the Canadian Electrical Code calls for wires and breakers sized to at least 125% of the heater’s maximum current.

04 · Installation

What the manuals require

  • Installation and service by a licensed electrician: otherwise the warranty is void.
  • The manufacturer also recommends a qualified plumber.
  • Working water pressure: 7 to 150 psi.
  • The heater starts as soon as 0.5 gpm of water flows.
  • Setting from 30 to 50 °C, one degree at a time; 48 °C suggested.
  • No gas and no venting: the heater is electric and wall-mounted.

For your quote request

Three details help choose the right size:

  1. the amperage of your electrical service (on the main breaker);
  2. the voltage, if you know it;
  3. the planned location and what it will supply (showers, kitchen, washer).

Sources: BD-18, BD-24/27 and BD-36-DWH manuals; bdwaterheaters.com product pages (no gas, no venting). The BD-36 manual gives up to 60 °C in its English section and 50 °C in its French and Spanish sections.

AirGreen × BLACK+DECKER18 to 36 kW at 240 VStarts at 0.5 gpmSet to the degree, 30 to 50 °CWritten warranty: 7 years against leaksNo gas, no ventingMontréal · Laval · Longueuil · South Shore · North Shore
05 · Warranty

What the written warranty covers

Manufacturer’s warranty document (bdwaterheaters.com/warranty, read Oct. 14, 2026). Terms run from the date of purchase.

Written7 yearsagainst leaks
Written2 yearsdefects in material and workmanship
Advertised only5 yearsheat exchanger, on the product pages; not in the warranty document

The document’s conditions

  • Replacement heater or part: labour and shipping not covered.
  • Original owner only: the warranty does not follow the house if it is sold.
  • Purchase from an authorized reseller; dated proof of purchase required.
  • Installation and service by a licensed electrician.
  • Liability limited to the cost of the heater or $1,000, whichever is less.
  • Claims: Paragon Group USA, 1-844-746-6688 (the document provides for arbitration in New Jersey).
06 · 2026 programs

No known rebate for this type of heater

Checked Oct. 14, 2026 on each program’s own site.

ENERGY STAR

Not eligible

The Version 5.0 residential water heater specification (in effect April 5, 2023) excludes electric resistance water heaters.

LogisVert

No measure

Hydro-Québec’s LogisVert measures include no water heater.

Hydro-Québec

Tank only

The only water-heater rebate ($100) is for Giant’s ECOPEAK tank heater, at the partners Hydro-Québec names.

Federal

Closed

The Canada Greener Homes Grant is closed; the deadline was September 30, 2025.

07 · FAQ

Questions about BLACK+DECKER water heaters

Which size should I choose for my home?

It depends on three things: the temperature of the incoming water, how many taps and showers run at once, and the voltage in your home. The calculation at the top of the page shows the effect of the first two; the quote accounts for all three.

Why does the flow drop in winter?

The heater has a fixed power. When the incoming water is colder, it has to be heated more to reach the same temperature, so less of it is heated each minute.

What flow does the manufacturer advertise?

3.7 gpm (18 kW), 4.68 gpm (24 kW), 5.3 gpm (27 kW) and 6.1 gpm (36 kW), on its product pages, with no temperature rise stated.

Is my electrical panel big enough?

The heaters draw 75 to 150 A at 240 V. Only a load calculation by an electrician, under the Canadian Electrical Code, can answer for your home.

What happens at 208 V?

The power drops to about 75% of the 240 V rating (manuals), so the hot-water flow drops too.

What is the warranty?

The warranty document gives 7 years against leaks and 2 years on defects, from the purchase date. The product pages also advertise 5 years on the heat exchanger, a term the document does not include.

Does the warranty follow the house if I sell it?

No. It covers the original owner only; a change of ownership ends it.

Is labour covered?

No. The manufacturer replaces the heater or the part; labour and shipping are not covered.

Is it eligible for LogisVert or ENERGY STAR?

No. ENERGY STAR excludes electric resistance water heaters and LogisVert lists no water heater among its measures (checked Oct. 14, 2026).

Does it need gas or venting?

No. It is an electric, wall-mounted heater; it needs water and electricity.

At what flow does the heater start?

At 0.5 gpm of flowing water, according to all four manuals.

What temperature should I set?

The range is 30 to 50 °C and the manufacturer suggests 48 °C. The BD-36 manual gives a 60 °C maximum in its English section, but 50 °C in French and Spanish.

Who makes these heaters?

They are imported by Paragon Group USA (Englewood, New Jersey), which uses the BLACK+DECKER brand under licence.

How much does it cost?

Price on quotation. The quote is free.

Sources

  1. bdwaterheaters.com — BD-18, BD-24, BD-27 and BD-36-DWH product pages (Paragon Group USA), read Oct. 14, 2026.
  2. BD-18, BD-24/27 and BD-36-DWH use and installation manuals (bdwaterheaters.com/manuals), read Oct. 14, 2026.
  3. Limited warranty document (bdwaterheaters.com/warranty), read Oct. 14, 2026.
  4. ENERGY STAR, Version 5.0 Residential Water Heaters, section 2B (in effect April 5, 2023).
  5. Hydro-Québec, LogisVert page and water-heater tips page (ECOPEAK offer), read Oct. 14, 2026.
  6. Natural Resources Canada, Canada Greener Homes Grant (Québec): program closed, read Oct. 14, 2026.

Price on quotation — free quote. The four BLACK+DECKER models are below.

The BLACK+DECKER shop

The four BLACK+DECKER water heaters, right below.

18, 24, 27 and 36 kW: open the model’s page. Price on quotation.

BLACK+DECKER