YORK · 2-head multi-zone YORK at AirGreenSold and installed by AirGreen in Montreal, Laval, Longueuil, the South Shore and the North Shore.

YORK multi-zone heat pump, 2 heads · checked October 26, 2026

YORK 2-zone heat pumps: ten outdoor units, from 18,000 to 42,000 BTU/h, for two rooms

For two rooms, all ten YORK outdoor units fit: W or M, from 18,000 to 42,000 BTU/h. YORK publishes 44 combinations of two heads for each series, from 9,000 + 9,000 to 24,000 + 24,000 BTU/h.

See the combinations Book my free estimate

2 zones

At 2 heads, the number of combinations YORK publishes, unit by unit.

18,000W Series3

24,000W Series6

30,000W Series6

36,000W Series15

42,000W Series14

18,000M Series3

24,000M Series6

30,000M Series6

36,000M Series15

42,000M Series14

W SeriesM Series

YORK 2020 catalogue, “Possible outdoor / indoor combinations” charts.

10two-head listings: 5 W and 5 M

18,000 to 42,000 BTU/h, outdoor unit

44published combinations per series

2heads at most on the 18,000 BTU/h units

AirGreen × YORKSold and installed by AirGreen2 heads10 outdoor unitsFrom 9,000 + 9,000 to 24,000 + 24,000 BTU/hW and M SeriesMontreal · Laval · Longueuil · South Shore · North Shore

01 · Combinations

Every 2-head combination, unit by unit.

Pick the outdoor unit size: here are the head sizes YORK allows on it, for the W Series and the M Series.

Outdoor unit

W Series · DHW30CMB21S6 published combinations · See the listing →

9 + 9= 18,0009 + 12= 21,00012 + 12= 24,0009 + 18= 27,00012 + 18= 30,00018 + 18= 36,000

M Series · DHM30CMB21S6 published combinations · See the listing →

9 + 9= 18,0009 + 12= 21,00012 + 12= 24,0009 + 18= 27,00012 + 18= 30,00018 + 18= 36,000

Head sizes in thousands of BTU/h (9 = 9,000 BTU/h); after the = sign, the sum of nominal sizes in BTU/h. Output stays that of the outdoor unit: YORK asks that the outdoor unit be sized for the whole house’s load, and each head for its own room. We don’t install a combination that is not on YORK’s list.

02 · The outdoor units

The 18,000 BTU/h units: two heads, no more.

Outdoor units whose maximum is 2 heads
Item	W Series · 18,000 BTU/h	M Series · 18,000 BTU/h
Outdoor model	DHW18CMB21SAHRI 8581781	DHM18CMB21SAHRI 8581773
Max. heads	2	2
SEER · EER · HSPF	22 · 12.5 · 9	16 · 10.2 · 8.2
Rated cooling · rated heating at 8.3 °C	18,000 · 19,000 BTU/h	18,000 · 19,000 BTU/h
Heating capacity, min. to max.	8,530 to 22,600 BTU/h	8,530 to 22,600 BTU/h
Heats down to	−20 °C	−15 °C
Cooling down to (outdoor)	−18 °C	−5 °C
Min. circuit ampacity (MCA) · max. overcurrent protection (MOCP)	15 A · 25 A	13 A · 20 A
Outdoor unit (W × H × D)	38 × 28 × 16 in.114 lb · 56 dB(A)	35 × 24 × 15 in.95 lb · 56 dB(A)
Total line length	66 ft	66 ft
To the farthest head	33 ft	33 ft
Height difference (up or down)	33 ft	16 ft
Factory charge	56.43 oz	47.61 oz

These units also take 2 heads; their full data is on the page of their maximum head count:

W · 24,000 · up to 3 heads W · 30,000 · up to 4 heads W · 36,000 · up to 5 heads W · 42,000 · up to 5 heads M · 24,000 · up to 3 heads M · 30,000 · up to 4 heads M · 36,000 · up to 4 heads M · 42,000 · up to 5 heads

AirGreen × YORK

The two-head system, designed by YORK, installed by AirGreen.

AirGreen picks the outdoor unit and each head’s size with you within YORK’s combinations, then installs the 2 heads.

What YORK brings

10 outdoor unitsW and M, from 18,000 to 42,000 BTU/h.
88 published combinationsAt 2 heads, W and M together.
Four head typesWall, cassette, floor-ceiling and ducted; our listings come with wall heads.

What AirGreen brings

Sold and installed by AirGreenIn Montreal, Laval, Longueuil, the South Shore and the North Shore.
Free visitWe measure the rooms, the insulation, the electrical service and the refrigerant line route.
Clear quoteThe exact model, what is included and the price, in writing.
RBQ 5645-9605-01Subcategories 15.8, 15.10 and 16.

The result: one head per room, 2 in all, in a combination YORK allows.

See the combinations Book my free estimate

The YORK shop · 2 zones

All two-head listings, right below.

One listing per outdoor unit, with wall heads and its AHRI number; other heads are quoted on request.

Everything to know · 2 zones

03 · Key facts

What is specific to 2-head systems.

9,000 + 9,000BTU/h: the smallest combination, allowed from 18,000 to 36,000 BTU/h, but missing from the list for the 42,000 unit.

22 SEERfor the 18,000 BTU/h W, the highest rating among YORK multi-zones (12.5 EER).

66 ftof total line length and 33 ft to the farthest head, for the 18,000 BTU/h units.

15two-head combinations on the 36,000 BTU/h unit, the widest choice at this count.

With two heads, YORK lists only 9,000 and 12,000 BTU/h heads on the 18,000 BTU/h units; it takes 24,000 BTU/h to connect an 18,000 head.
The 18,000 BTU/h M allows 16 ft of height difference, the W 33 ft.

04 · LogisVert

LogisVert: none of our 2-head YORK systems qualifies.

0/10

None of the 10 AHRI numbers on our 10 listings is on Hydro-Québec’s LogisVert list of October 26, 2026 (“homeowner, existing house” profile), nor in the ENERGY STAR records checked the same day. So we promise no LogisVert amount on these systems.

Frequently asked questions

What people ask us about 2-head systems.

Which YORK outdoor units serve two rooms?

All ten: the W and M at 18,000, 24,000, 30,000, 36,000 and 42,000 BTU/h. The 18,000 BTU/h units stop at two heads.

Can I put two 9,000 BTU/h heads on a 42,000 unit?

No: YORK does not list that combination for the 42,000 BTU/h unit. It is allowed from 18,000 to 36,000 BTU/h.

What are the largest heads in a two-head system?

Two 24,000 BTU/h heads, allowed on the 36,000 and 42,000 BTU/h units; output stays that of the outdoor unit.

Do YORK two-zone systems qualify for LogisVert?

No: no AHRI number on our 10 two-head listings is on Hydro-Québec’s October 26, 2026 list.

AirGreen · Air conditioning & heating

Your 2 rooms, one YORK outdoor unit, installed by AirGreen.

At the free visit, we check whether your two rooms fit an 18,000 BTU/h unit or need a 24,000 to take an 18,000 head.

Book my free estimate 514 316-2973

RBQ 5645-9605-01Subcategories 15.8, 15.10 and 16

Free estimateAt home, no obligation

Sold and installed by AirGreenMontreal, Laval, Longueuil, South Shore and North Shore

Showroom1370 Joliot-Curie Street, unit 712, Boucherville

Sources and dates checked

YORK, Mini-Split Systems catalogue PUBL-7782v6 (November 2020): M and W multi-zone, outdoor units (pp. 24 and 31), indoor units (pp. 23, 25 to 28 and 32 to 35), possible combinations (pp. 29, 30, 36 and 37); copy in our documents, re-read October 26, 2026.
YORK, M Series (PUBL-8258v2) and W Series (PUBL-8259v2) brochures, July 2019: maximum zones per outdoor unit; copies in our documents, re-read October 26, 2026.
Hydro-Québec, LogisVert eligible heat pump list, file of October 26, 2026, “homeowner, existing house” profile, searched by AHRI number.
ENERGY STAR, Certified Air-Source Heat Pumps, dataset w7cv-9xjt, searched by AHRI number on October 26, 2026.
airgreen.ca product pages: outdoor units, head counts and AHRI numbers we carry, read October 26, 2026.

Price on quote. YORK® is a registered trademark, used here to identify the products we sell and install.

YORK 2-zone heat pumps: ten outdoor units, from 18,000 to 42,000 BTU/h, for two rooms

At 2 heads, the number of combinations YORK publishes, unit by unit.

Every 2-head combination, unit by unit.

The 18,000 BTU/h units: two heads, no more.