Steffes Serenity thermal storage heaters

Steffes’ new-generation Serenity stores heat in ceramic bricks when electricity costs least, then releases it during peaks. Sinopé smart thermostat, 100% electric, zero combustion. The Serenity 4210 is available now; the new SEN10 and SEN20 arrive in 2027.

Free quote See the models

80 kWhSerenity 4210 · available now

2027SEN10 (80 kWh) and SEN20 (150 kWh)

Sinopésmart thermostat, Neviweb app

0combustion: 100% electric

Why Steffes

What makes the difference

New generation in 2027

Available in 2027, the SEN10 and SEN20 add energy usage monitoring, an integrated clock, battery backup and an A2L leak dry contact for heat pumps using the new refrigerant.

Sinopé smart thermostat

The system is controlled with a Sinopé thermostat, designed in Québec: remote control and tracking in the Neviweb app.

The heat pump’s partner

Paired with a central heat pump (up to 5 tons), the heater takes over in deep cold with its stored heat.

Built for Hydro-Québec peaks

It charges off-peak and heats during peaks; eligible for Hydro-Québec’s electric thermal storage incentive.

Smart heating · high-performance home

Comfort without compromise, even when rates change

Sinopé and Steffes combine their expertise: the Steffes electric thermal storage (ETS) heater and the Québec-made Sinopé Pro thermostat heat your home at the most economical time. Stable temperature, zero stress during peak periods.

Syncs brick charging with off-peak periods
Remote access with the Sinopé Neviweb app
Easy adjustment of brick charging time

Off-peak heat storage
The Steffes heater charges its ceramic brick core when rates are lower.
Controlled delivery
Stored heat is delivered through the house by forced air, exactly when it’s needed.
Maximized savings
The Sinopé Pro thermostat syncs charging and delivery with your utility’s rate schedule.

$22,000possible LogisVert financial assistance for a Steffes Serenity combined with a central heat pump

$200 to $300saved per year with the Flex D rate, Steffes ETS and the Sinopé Pro thermostat

Amounts from the Sinopé × Steffes “Smart heating. High-performance home.” brochure; confirm with Hydro-Québec for your situation.

Models

The Steffes models we install

Every project starts with a load calculation: we recommend the right size, not the biggest one.

Steffes Serenity 4210 Thermal Storage Heater

LogisVert grant up to $22,000With a central heat pump · Hydro-Québec

Steffes Serenity 4210 Thermal Storage Heater

Central heating with heat storage: heat stored during off-peak hours

80 kWh · 272,960 BTU of stored heat
Pairs with a central heat pump
LogisVert grant up to $22,000 with a central heat pump
Easy integration with existing ducts

Request a quote PDF sheet

Available in 2027

Steffes SEN10 thermal storage heater

New-generation Serenity · 80 kWh · available in 2027

80 kWh · 273,040 BTU of stored heat
Sinopé Pro thermostat: off-peak charging sync, tracking in the Neviweb app
13.6 / 16 / 22.3 kW charging · full charge in 3.5 to 5.8 h
Pairs with a central heat pump up to 5 tons

Request a quote PDF sheet

Available in 2027

Steffes SEN20 thermal storage heater

New-generation Serenity · 150 kWh · available in 2027

150 kWh · 511,950 BTU of stored heat
Sinopé Pro thermostat: off-peak charging sync, tracking in the Neviweb app
24 / 33.5 kW charging · full charge in 4.5 to 5.7 h
Pairs with a central heat pump up to 5 tons

Request a quote PDF sheet

Grants

Your grant, worked out with you

We check unit eligibility (LogisVert, federal rebate, Hydro-Québec incentives) and help you with the paperwork. Financeit financing available.

Estimate my grant Request a quote

Site visit and load calculation before the quote
Installed by our certified technicians · RBQ licence
6-year legal warranty (Law 29) on heat pumps sold from October 5, 2026
Maintenance and 24/7 emergency service by the same team

FAQ

Questions about Steffes

When will the SEN10 and SEN20 be available?

The new SEN10 and SEN20 will be available in 2027. Until then, we install the Steffes Serenity 4210 (80 kWh, 272,960 BTU), which works on the same off-peak storage principle. Call us to plan your project.

What is the difference between the SEN10 and SEN20?

The SEN10 stores 80 kWh (273,040 BTU, 43 × 44 × 47 in) and the SEN20 150 kWh (511,950 BTU, 43 × 44 × 66 in) for larger homes. Maximum maintainable heat loss on Hydro-Québec’s 4-6-4-10 cycle ranges from 11.11 to 19.08 kW (SEN10) and from 22.46 to 28.62 kW (SEN20), depending on charging input.

Which thermostat does the heater use?

The SEN10 and SEN20 are controlled with a Sinopé smart thermostat, for remote control and energy tracking in the Neviweb app.

How does a thermal storage heater work?

It heats high-density ceramic bricks during off-peak hours, then a blower sends that heat through your ducts as needed, especially during peak periods.

Is there a grant for Steffes?

Steffes heaters are eligible for Hydro-Québec’s electric thermal storage incentive, on their own or with a heat pump. Confirm the current amount with Hydro-Québec before purchase.

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