YORK · 4-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, 4 heads · checked October 26, 2026

YORK 4-zone heat pumps: six outdoor units, from 30,000 to 42,000 BTU/h, for four rooms

For four rooms, six outdoor units: the W and the M at 30,000, 36,000 and 42,000 BTU/h, with 47 combinations of four heads per series. The 36,000 M and both 30,000 units stop at four.

See the combinations Book my free estimate

4 zones

At 4 heads, the number of combinations YORK publishes, unit by unit.

30,000W Series4

36,000W Series15

42,000W Series28

30,000M Series4

36,000M Series15

42,000M Series28

W SeriesM Series

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

6four-head listings: 3 W and 3 M

30,000 to 42,000 BTU/h, outdoor unit

47published combinations per series

12 EER30,000 BTU/h W, versus 7.3 for the M

AirGreen × YORKSold and installed by AirGreen4 heads6 outdoor units30,000 to 42,000 BTU/hW and M SeriesMontreal · Laval · Longueuil · South Shore · North Shore

01 · Combinations

Every 4-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 · DHW36CMB21S15 published combinations · See the listing →

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

M Series · DHM36CMB21S15 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

Four heads at most: the 30,000 W and M, the 36,000 M.

Outdoor units whose maximum is 4 heads
Item	W Series · 30,000 BTU/h	M Series · 30,000 BTU/h	M Series · 36,000 BTU/h
Outdoor model	DHW30CMB21SAHRI 8581966	DHM30CMB21SAHRI 8581962	DHM36CMB21SAHRI 8578493
Max. heads	4	4	4
SEER · EER · HSPF	21 · 12 · 10.2	16 · 7.3 · 8.2	16 · 7.9 · 8.2
Rated cooling · rated heating at 8.3 °C	29,000 · 30,400 BTU/h	29,000 · 30,400 BTU/h	34,000 · 35,800 BTU/h
Heating capacity, min. to max.	7,500 to 36,000 BTU/h	7,500 to 36,000 BTU/h	10,663 to 40,944 BTU/h
Heats down to	−20 °C	−15 °C	−15 °C
Cooling down to (outdoor)	−18 °C	−5 °C	−5 °C
Min. circuit ampacity (MCA) · max. overcurrent protection (MOCP)	19 A · 30 A	26 A · 45 A	28 A · 45 A
Outdoor unit (W × H × D)	38 × 31 × 17 in.145 lb · 59 dB(A)	36 × 31 × 17 in.153 lb · 56 dB(A)	36 × 31 × 17 in.161 lb · 59 dB(A)
Total line length	245 ft	245 ft	245 ft
To the farthest head	82 ft	66 ft	66 ft
Height difference (up or down)	49 ft	33 ft	49 ft
Factory charge	98.76 oz	77.6 oz	102.29 oz

These units also take 4 heads; their full data is on the page of their maximum head count:

W · 36,000 · up to 5 heads W · 42,000 · up to 5 heads M · 42,000 · up to 5 heads

AirGreen × YORK

The four-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 4 heads.

What YORK brings

6 outdoor unitsW and M, from 30,000 to 42,000 BTU/h.
94 published combinationsAt 4 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, 4 in all, in a combination YORK allows.

See the combinations Book my free estimate

The YORK shop · 4 zones

All four-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 · 4 zones

03 · Key facts

What is specific to 4-head systems.

4four-head combinations on the 30,000 BTU/h units, all with at least two 9,000 heads.

12 EERfor the 30,000 BTU/h W (21 SEER), versus 7.3 for the 30,000 M, the widest EER gap between the two series.

15four-head combinations on the 36,000 BTU/h units; the 36,000 M stops there, the W goes up to five.

28four-head combinations on the 42,000 BTU/h units.

The 30,000 BTU/h W allows 82 ft to the farthest head and 49 ft of height difference, versus 66 ft and 33 ft for the 30,000 M.
The 30,000 BTU/h M needs the largest circuit at this size: MCA 26 A and MOCP 45 A, versus 19 A and 30 A for the W.

04 · LogisVert

LogisVert: none of our 4-head YORK systems qualifies.

0/6

None of the 6 AHRI numbers on our 6 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 4-head systems.

Which YORK outdoor units serve four rooms?

The W and M at 30,000, 36,000 and 42,000 BTU/h. The 30,000 W and M, and the 36,000 M, stop at four heads.

Four heads on a 30,000 BTU/h unit, is that possible?

Yes, in four combinations: 4 × 9,000, 3 × 9,000 + 12,000, 3 × 9,000 + 18,000 and 2 × 9,000 + 2 × 12,000 BTU/h.

W or M at 30,000 BTU/h with four heads?

The W is rated 21 SEER and 12 EER, the M 16 SEER and 7.3 EER; the W heats down to −20 °C, the M to −15 °C. The allowed combinations are the same.

Do YORK four-zone systems qualify for LogisVert?

No: no AHRI number on our 6 four-head listings is on Hydro-Québec’s October 26, 2026 list.

AirGreen · Air conditioning & heating

Your 4 rooms, one YORK outdoor unit, installed by AirGreen.

At the free visit, we check whether a 30,000 BTU/h unit is enough for your four heads or a 36,000 or 42,000 is needed.

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 4-zone heat pumps: six outdoor units, from 30,000 to 42,000 BTU/h, for four rooms

At 4 heads, the number of combinations YORK publishes, unit by unit.

Every 4-head combination, unit by unit.

Four heads at most: the 30,000 W and M, the 36,000 M.