What does 14.3+ SEER2 mean for my cooling bill?

SEER2 measures cooling efficiency under updated testing standards — higher is more efficient. At 14.3+ SEER2, the ML14KC1 meets the current minimum efficiency standard for new central AC in most of Canada, a real improvement over an older 10–13 SEER unit without paying for premium variable-speed equipment.

What is R-454B refrigerant, and why does it matter?

R-454B is the newer refrigerant replacing R-410A across the industry because it has a lower global-warming potential. New AC equipment, including the ML14KC1, ships on R-454B rather than the older R-22, which was phased out in Canada and is now expensive and hard to source for repairs.

What size ML14KC1 do I need?

It's available from 2 to 5 tons of cooling capacity. The right size depends on your home's square footage, insulation, window exposure and ductwork — we run a load calculation rather than just matching tonnage to the furnace already installed, since an oversized AC short-cycles and doesn't dehumidify properly.

Does this AC qualify for a rebate?

Standard central air conditioners like the ML14KC1 are not part of Ontario's current electrification rebate programs, which are focused on heat pumps. If lowering costs through a rebate matters to you, ask us about heat pump options that cool and heat in one system.

What's the warranty on the ML14KC1?

Lennox backs the compressor with a 5-year limited warranty and parts with a 5-year warranty that extends to 10 years once you register the unit after installation, which we take care of on install day.

Lennox · Air Conditioner

Lennox ML14KC1

Name: Lennox ML14KC1
Brand: Lennox

The Lennox ML14KC1 is a Merit Series single-stage central air conditioner that meets or exceeds 14.3 SEER2 and runs on the newer, lower-GWP R-454B refrigerant. It's the practical, mid-priced replacement most homeowners land on when an older AC fails, and Imperial Heating sizes and installs it for homes across York Region, Durham and the GTA.

14.3+SEER2ENERGY STAR® Certified

Get a Free Quote (647) 852-2359

Lennox ML14KC1 Merit Series central air conditioner

Why Homeowners Choose the Lennox ML14KC1

Meets or exceeds 14.3 SEER2 and is ENERGY STAR certified — an efficiency step up from older single-stage units

Runs on R-454B, the newer low-global-warming-potential refrigerant now standard on current equipment

Sound levels as low as 73 dB keep the outdoor unit reasonably quiet for a single-stage system

Backed by a 5-year compressor warranty and 5-year parts warranty (10-year with registration)

A Good Fit If

Homeowners replacing an aging or failed central AC who want a dependable, no-frills upgrade rather than a premium variable-speed system

Households cooling a typical 2–5 ton home — most detached, semi and townhouse layouts fit this range

Anyone whose current AC still runs the phased-out R-22 refrigerant and needs a modern-refrigerant replacement

Buyers who want ENERGY STAR efficiency without paying for two-stage or inverter technology

Manufacturer Specifications

Series: Merit® Series
Efficiency: Meets/exceeds 14.3 SEER2
Cooling stage: Single-stage
Sound level: As low as 73 dB
Refrigerant: R-454B (low-GWP)
Sizes: 2 – 5 tons
Compressor warranty: 5-year limited
Parts warranty: 5-year (10-year with registration)
Certifications: ENERGY STAR® Certified

Get a free quote on the Lennox ML14KC1 (647) 852-2359

Specifications published by Lennox. View manufacturer spec sheet

Lennox ML14KC1 — Frequently Asked Questions

Common questions homeowners ask about the Lennox ML14KC1 before booking an install.

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Get a Quote on the Lennox ML14KC1

Tell us about your home and we'll give you honest pricing and sizing for the Lennox ML14KC1 — installed across York Region, Durham, Simcoe and the GTA. Every quote is written, not verbal.

Call 24/7(647) 852-2359

Lennox ML14KC1

14.3+SEER2ENERGY STAR® Certified

Why Homeowners Choose the Lennox ML14KC1

Meets or exceeds 14.3 SEER2 and is ENERGY STAR certified — an efficiency step up from older single-stage units

Runs on R-454B, the newer low-global-warming-potential refrigerant now standard on current equipment

Sound levels as low as 73 dB keep the outdoor unit reasonably quiet for a single-stage system

Backed by a 5-year compressor warranty and 5-year parts warranty (10-year with registration)

A Good Fit If

Homeowners replacing an aging or failed central AC who want a dependable, no-frills upgrade rather than a premium variable-speed system

Households cooling a typical 2–5 ton home — most detached, semi and townhouse layouts fit this range

Anyone whose current AC still runs the phased-out R-22 refrigerant and needs a modern-refrigerant replacement

Buyers who want ENERGY STAR efficiency without paying for two-stage or inverter technology

Lennox ML14KC1

Why Homeowners Choose the Lennox ML14KC1

A Good Fit If

Manufacturer Specifications

Lennox ML14KC1 — Frequently Asked Questions

More Air Conditioners We Install

Get a Quote on the Lennox ML14KC1

Get a free quote

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Lennox ML14KC1

Why Homeowners Choose the Lennox ML14KC1

A Good Fit If

Manufacturer Specifications

Lennox ML14KC1 — Frequently Asked Questions

More Air Conditioners We Install

Get a Quote on the Lennox ML14KC1

Get a free quote