How cold can this heat pump handle before it stops heating effectively?

KeepRite rates the Ion 23 for heating operation down to -13°F, which is -25°C. That covers the vast majority of winter nights across York Region, Durham and Simcoe. On the rare night that dips colder, a dual-fuel setup with a backup furnace can take over — we'll discuss whether that makes sense for your specific location.

What does 'fully variable-speed' mean for comfort?

The compressor can run anywhere from 20% to 100% output rather than jumping straight from off to full power. In heating mode that means longer, gentler cycles that hold a steadier indoor temperature; in cooling mode it also improves humidity control compared to a single-stage or two-stage system.

Is the Ion 23 eligible for a rebate?

Heat pumps are the category eligible under Ontario's current electrification rebate programs. Program details, eligible-contractor requirements and dollar amounts change over time, so we'll confirm current numbers with you directly rather than promise a fixed rebate figure.

What size Ion 23 do I need?

It's available from 2 to 5 tons. As with any heat pump or AC, we size it off your home's actual heat loss and heat gain — insulation, windows, ductwork — through an in-home assessment, not by matching the tonnage of your current system.

What warranty comes with the Ion 23?

KeepRite backs the compressor with a 10-year limited warranty and parts with a 10-year warranty once registered after installation, which we handle for you.

KeepRite · Heat Pump

KeepRite Ion 23

Name: KeepRite Ion 23
Brand: KeepRite

The KeepRite Ion 23 is a Canadian-built, fully variable-speed heat pump that heats down to -13°F (-25°C) and cools up to 23 SEER2. The compressor modulates in small steps from 20% to 100% output, which is what lets it hold performance in cold weather instead of just cycling fully on and off. Imperial Heating installs the Ion 23 for central heat pump systems across York Region, Durham and Simcoe.

up to 23SEER2ENERGY STAR® Certified

Get a Free Quote (647) 852-2359

KeepRite Ion 23 variable-speed cold-climate heat pump

Why Homeowners Choose the KeepRite Ion 23

Fully variable-speed compressor (20–100%) modulates output instead of cycling fully on and off, holding temperature steadier

Rated to heat down to -13°F (-25°C), covering most winter nights in our service area

Up to 23 SEER2 cooling and up to 12 HSPF2 heating — strong efficiency in both directions

ENERGY STAR qualified, on R-454B refrigerant, with a 10-year limited compressor warranty and 10-year parts warranty when registered

A Good Fit If

Homeowners in colder pockets of our service area — Simcoe, north Durham, north York Region — who need genuine cold-weather heat pump performance

Buyers who want a Canadian-engineered system built with Ontario winters specifically in mind

Households replacing a central furnace-and-AC setup with one system that heats and cools

Anyone comparing central ducted heat pumps against ductless mini-splits for a whole-home retrofit

Manufacturer Specifications

Model: C5H3V (Ion™ 23)
Cooling efficiency: Up to 23 SEER2
Heating efficiency: Up to 12 HSPF2
Compressor: Fully variable-speed (20–100%)
Cold-climate: Heating operation down to -13°F (-25°C)
Sound level: As low as 55 dB
Refrigerant: R-454B (low-GWP)
Sizes: 2 – 5 tons
Compressor warranty: 10-year limited
Parts warranty: 10-year (with registration)
Certifications: ENERGY STAR® Qualified

Get a free quote on the KeepRite Ion 23 (647) 852-2359

Specifications published by KeepRite. View manufacturer spec sheet

KeepRite Ion 23 — Frequently Asked Questions

Common questions homeowners ask about the KeepRite Ion 23 before booking an install.

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Get a Quote on the KeepRite Ion 23

Tell us about your home and we'll give you honest pricing and sizing for the KeepRite Ion 23 — installed across York Region, Durham, Simcoe and the GTA. Every quote is written, not verbal.

Call 24/7(647) 852-2359

KeepRite Ion 23

up to 23SEER2ENERGY STAR® Certified

Why Homeowners Choose the KeepRite Ion 23

Fully variable-speed compressor (20–100%) modulates output instead of cycling fully on and off, holding temperature steadier

Rated to heat down to -13°F (-25°C), covering most winter nights in our service area

Up to 23 SEER2 cooling and up to 12 HSPF2 heating — strong efficiency in both directions

ENERGY STAR qualified, on R-454B refrigerant, with a 10-year limited compressor warranty and 10-year parts warranty when registered

A Good Fit If

Homeowners in colder pockets of our service area — Simcoe, north Durham, north York Region — who need genuine cold-weather heat pump performance

Buyers who want a Canadian-engineered system built with Ontario winters specifically in mind

Households replacing a central furnace-and-AC setup with one system that heats and cools

Anyone comparing central ducted heat pumps against ductless mini-splits for a whole-home retrofit

KeepRite Ion 23

Why Homeowners Choose the KeepRite Ion 23

A Good Fit If

Manufacturer Specifications

KeepRite Ion 23 — Frequently Asked Questions

More Heat Pumps We Install

Get a Quote on the KeepRite Ion 23

Get a free quote

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KeepRite Ion 23

Why Homeowners Choose the KeepRite Ion 23

A Good Fit If

Manufacturer Specifications

KeepRite Ion 23 — Frequently Asked Questions

More Heat Pumps We Install

Get a Quote on the KeepRite Ion 23

Get a free quote