YORK · 3-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, 3 heads · checked October 26, 2026

YORK 3-zone heat pumps: eight outdoor units and every three-head combination they take

For three rooms, eight outdoor units: the W and the M from 24,000 to 42,000 BTU/h. YORK publishes 65 combinations of three heads per series; the 24,000 BTU/h units stop at three heads.

See the combinations Book my free estimate

3 zones

At 3 heads, the number of combinations YORK publishes, unit by unit.

24,000W Series5

30,000W Series7

36,000W Series23

42,000W Series30

24,000M Series5

30,000M Series7

36,000M Series23

42,000M Series30

W SeriesM Series

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

8three-head listings: 4 W and 4 M

24,000 to 42,000 BTU/h, outdoor unit

65published combinations per series

3heads at most on the 24,000 BTU/h units

AirGreen × YORKSold and installed by AirGreen3 heads8 outdoor units24,000 to 42,000 BTU/hW and M SeriesMontreal · Laval · Longueuil · South Shore · North Shore

01 · Combinations

Every 3-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 · DHW36CMB21S23 published combinations · See the listing →

9 + 9 + 9= 27,0009 + 9 + 12= 30,0009 + 9 + 18= 36,0009 + 9 + 21= 39,0009 + 9 + 24= 42,0009 + 12 + 12= 33,0009 + 12 + 18= 39,0009 + 12 + 21= 42,0009 + 12 + 24= 45,0009 + 18 + 18= 45,0009 + 18 + 21= 48,0009 + 18 + 24= 51,0009 + 21 + 21= 51,0009 + 21 + 24= 54,00012 + 12 + 12= 36,00012 + 12 + 18= 42,00012 + 12 + 21= 45,00012 + 12 + 24= 48,00012 + 18 + 18= 48,00012 + 18 + 21= 51,00012 + 18 + 24= 54,00012 + 21 + 21= 54,00018 + 18 + 18= 54,000

M Series · DHM36CMB21S23 published combinations · See the listing →

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 24,000 BTU/h units: three heads at most.

Outdoor units whose maximum is 3 heads
Item	W Series · 24,000 BTU/h	M Series · 24,000 BTU/h
Outdoor model	DHW24CMB21SAHRI 8581793	DHM24CMB21SAHRI 8581777
Max. heads	3	3
SEER · EER · HSPF	20.5 · 9.5 · 10.2	16 · 8.2 · 8.2
Rated cooling · rated heating at 8.3 °C	26,000 · 29,000 BTU/h	26,000 · 29,000 BTU/h
Heating capacity, min. to max.	7,500 to 35,000 BTU/h	7,500 to 35,000 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)	21 A · 35 A	20 A · 30 A
Outdoor unit (W × H × D)	38 × 31 × 17 in.153 lb · 59 dB(A)	37 × 28 × 16 in.135 lb · 56 dB(A)
Total line length	197 ft	245 ft
To the farthest head	66 ft	66 ft
Height difference (up or down)	33 ft	33 ft
Factory charge	77.6 oz	77.6 oz

These units also take 3 heads; their full data is on the page of their maximum head count:

W · 30,000 · up to 4 heads W · 36,000 · up to 5 heads W · 42,000 · up to 5 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 three-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 3 heads.

What YORK brings

8 outdoor unitsW and M, from 24,000 to 42,000 BTU/h.
130 published combinationsAt 3 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, 3 in all, in a combination YORK allows.

See the combinations Book my free estimate

The YORK shop · 3 zones

All three-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 · 3 zones

03 · Key facts

What is specific to 3-head systems.

5three-head combinations on the 24,000 BTU/h units, from 9,000 + 9,000 + 9,000 to 12,000 + 12,000 + 12,000.

197 · 245 ftof total line length for the 24,000 BTU/h W and M: the M allows more.

20.5SEER for the 24,000 BTU/h W, with 9.5 EER, the lowest in the W Series.

30three-head combinations on the 42,000 BTU/h units.

At three heads, the 21,000 BTU/h head appears only from the 36,000 BTU/h unit up.
On the 24,000 BTU/h unit, a single 18,000 head is allowed, with two 9,000 heads.

04 · LogisVert

LogisVert: none of our 3-head YORK systems qualifies.

0/8

None of the 8 AHRI numbers on our 8 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 3-head systems.

Which YORK outdoor units serve three rooms?

The W and M at 24,000, 30,000, 36,000 and 42,000 BTU/h. The 24,000 BTU/h units stop at three heads.

Can I connect three 12,000 BTU/h heads to a 24,000 unit?

Yes: 12,000 + 12,000 + 12,000 is among the five three-head combinations listed for the 24,000 BTU/h unit.

From what size can a three-head system include a 24,000 BTU/h head?

From the 36,000 BTU/h unit up, with two 9,000 or 12,000 heads, for example.

Do YORK three-zone systems qualify for LogisVert?

No: no AHRI number on our 8 three-head listings is on Hydro-Québec’s October 26, 2026 list.

AirGreen · Air conditioning & heating

Your 3 rooms, one YORK outdoor unit, installed by AirGreen.

At the free visit, we check whether the 24,000 BTU/h W (197 ft of total line length) is enough, or the 24,000 M or the 30,000 W (245 ft each) is needed for your three rooms.

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 3-zone heat pumps: eight outdoor units and every three-head combination they take

At 3 heads, the number of combinations YORK publishes, unit by unit.

Every 3-head combination, unit by unit.

The 24,000 BTU/h units: three heads at most.