Senville Pro Partner · Authorized dealer/installer
Four rooms, one outdoor unit: the three Senville models that take four heads.
Senville 4-zone heat pump
Four rooms on one outdoor unit: the 18K (18,000 BTU) stops at three heads, so everything starts at the 28K (28,000 BTU). Here are Senville’s two four-head kits, the line-set limits with four heads, and what the 28K, the 36K (36,000 BTU) and the 48K (48,000 BTU) deliver at −15 °C and earn in LogisVert.
Updated October 26, 2026 · Senville, ENERGY STAR, NEEP and Hydro-QuébecSchematic drawn to the published widths and heights. The 18K and 28K share the same cabinet dimensions, 37.24 × 16.14 × 31.89 in; the 36K stands 38.39 in tall, the 48K 52.48 in. senville.ca spec tables, October 14, 2026.
This page answersFor homes with four rooms to heat and cool from one outdoor unit: which of Senville’s four outdoor units take four heads, the four-head kits Senville sells, the line-set limits with four heads and the LogisVert range once the 18K is out.
Our 3 Senville systems with four zones, right below.
One system per eligible outdoor unit: 28K, 36K or 48K. The size of each of the four heads is set at the visit.
Four heads: the 18K drops out
For each of its four multi-zone outdoor units, Senville publishes how many heads it takes. At four heads the 18K is out; the other three stay, each with its certified deep-cold heat, circuit and LogisVert amount; the 36K and 48K have their Quad-Zone kits.
Wall heads in thousands of BTU/h: 9 = 9,000 BTU/h.
- 18KSENA-18HF-MOA2 or 3 headsOut at four heads
Senville prints “2-3” in the spec table of its SENA/18HF/D kit and “SENA-18HF-MOA (2 to 3 Zones)” on its 9,000 wall-head page; its English and French titles say “3 Zones”. A fourth head fits none of these readings.
- 28KSENA-28HF-MOA2 to 4 heads, per four English pages out of five
No Quad-Zone kit
Senville’s Quad-Zone page offers only the 36K and 48K. Here the four heads are chosen one by one, and the French title on fr.senville.ca even says “(2 à 3 zones)”, as does the SENA/30HF/DIC ceiling-cassette kit (“2-3”): we use 2 to 4, the value on four English pages out of five.
- Heat at −15 °C
- 27,000BTU/h · COP 2.00
- Maximum at −30 °C
- 14,000BTU/h · COP 1.26
- LogisVert
- $3,600indicative
- Circuit
- 30 A · 35 Amin. ampacity · max. fuse
Certified at 27,000 BTU/h of cooling; Senville sells it as a 28,000 BTU unit.
See our 28K 4-zone system - 36KSENA-36HF-MOA2 to 5 heads per Senville
SENA/36HF/Q SKU SENA-36HF-Q9999
- 9,000 × 4
- 9,000 × 3 + 12,000
- 9,000 × 3 + 18,000
- 9,000 × 2 + 12,000 × 2
- Heat at −15 °C
- 36,000BTU/h · COP 2.00
- Maximum at −30 °C
- 22,400BTU/h · COP 1.47
- LogisVert
- $4,560indicative
- Circuit
- 37 A · 40 Amin. ampacity · max. fuse
Its ceiling-cassette kits (“2-4”) and the multi-zone service manual (“one to four units”: not confirmed) cap it at four: with four heads, every reading that goes to four or more agrees.
See our 36K 4-zone system - 48KSENA-48HF-MOA2 to 6 heads, or 2 to 5 depending on the page
SENA/48HF/Q SKU SENA-48HF-Q12121212
- 12,000 × 4
- Heat at −15 °C
- 47,000BTU/h · COP 2.00
- Maximum at −30 °C
- 24,600BTU/h · COP 1.27
- LogisVert
- $5,400indicative
- Circuit
- 37 A · 40 Amin. ampacity · max. fuse
“2-6” on its five-head kit page, “2-5” on its four-head kit page (October 26, 2026): four heads fit either way.
See our 48K 4-zone system
With the 18K out
The range of the three units that take four heads. The LogisVert floor rises from $2,400 (18K) to $3,600 (28K).
- LogisVert, indicative$3,600 → $5,400
- Heat at −15 °C27,000 → 47,000 BTU/h
- Maximum at −30 °C14,000 → 24,600 BTU/h
Heat bars on the same scale, 0 to 50,000 BTU/h.
Head counts: senville.ca kit spec tables and the 9,000 BTU multi-zone head page, re-read October 26, 2026, with the Quad-Zone category and the fr.senville.ca catalogue; English outdoor-unit titles, October 14, 2026. Heat: rated capacity at −15 °C published by ENERGY STAR, maximum capacity at −30 °C reported by Senville to NEEP, COPs from NEEP. LogisVert: Hydro-Québec’s list by AHRI number. Certified data read October 14, 2026, re-checked unchanged October 26, 2026.
What each four-head kit connects to its outdoor unit
Senville sells five combinations of four wall heads, four on the 36K and one on the 48K. Added up, their heads exceed the certified rated capacity in four cases out of five, up to 125% on the 36K with three 9,000 heads and one 18,000.
| Heads in the combination | Sum of the heads | Share of rated cooling capacity | Lines, liquid · gas |
|---|---|---|---|
| SENA/36HF/Q · SKU SENA-36HF-Q9999 · 36K certified at 36,000 BTU/h of cooling · printed pre-charge: 125 ft | |||
| 9,000 × 4 | 36,000 BTU/h | 100% | 4 × 1/4 · 3/8 in |
| 9,000 × 3 + 12,000 | 39,000 BTU/h | 108% | 4 × 1/4 · 3/8 in |
| 9,000 × 3 + 18,000 | 45,000 BTU/h | 125% | 3 × 1/4 · 3/8 in + 1 × 1/4 · 1/2 in |
| 9,000 × 2 + 12,000 × 2 | 42,000 BTU/h | 117% | 4 × 1/4 · 3/8 in |
| SENA/48HF/Q · SKU SENA-48HF-Q12121212 · 48K certified at 47,000 BTU/h of cooling · printed pre-charge: 125 ft not confirmed (150 ft on the five-head page of the same unit) | |||
| 12,000 × 4 | 48,000 BTU/h | 102% | 4 × 1/4 · 3/8 in |
| 28K (SENA-28HF-MOA): no Quad-Zone kit from Senville; four heads of your choice, within the published 2 to 4. | |||
heads add up to more than the certified rated cooling capacity
No published rule for the MOA series
On its Build Your Own page, Senville only writes “Total indoor capacity must suit the outdoor unit you selected”, with no minimum or maximum. Only an older Senville sheet, written for the MOZ generation and still linked from the 9,000 head, says each head then has its output adjusted; nothing confirms the rule carries over to the MOA series.
Two values for the same 48K
On October 26, 2026, the SENA/48HF/Q kit page prints a 125 ft pre-charge and “2-5” heads, the same values as the 36K; on October 14 it said 150 ft and “2-6”, like the five-head kit page of the same SENA-48HF-MOA. We treat 125 ft as not confirmed, to be validated with Senville before any quote.
Heads and pre-charges: senville.ca SENA/36HF/Q and SENA/48HF/Q kit pages, re-read October 26, 2026. Rated cooling capacity at 35 °C: NEEP, read October 14, 2026 and re-checked October 26, 2026. Sum and share: AirGreen calculation (sum of heads ÷ rated capacity). Lines: installation manual QS006UI-YTD(R454B), p. 18, and service manual SM_ODUMULTI_R454B_3D INV_US1_NA_2403, p. 3. MOZ rule: “Compatible Indoor Combinations for Senville Multi-Zone Systems” sheet, undated.
80 m of line set for four heads, never more than 35 m to any one
The multi-zone installation manual sets lengths by the number of heads connected, not by outdoor unit: with four heads, the limits are the same on the 28K, the 36K and the 48K.
Allowed lengths, without quick connectors unless noted
- All four lines together80 m (262 ft)
- Any one head, at most35 m (115 ft)
- Average if the 80 m is shared evenly20 m (65.6 ft)calculation
- Any one head, with quick connectors22.5 m (73 ft)not confirmed
Total with quick connectors and four heads: unreadable in the manual’s table. not confirmed
Two long runs leave only 10 m
Two heads at 35 m use 70 m of the 80 m allowed: 10 m is left for the other two. With four rooms far apart, where the outdoor unit goes matters as much as its capacity.
Height differences and the standard length per head do not change with the number of heads: see the multi-zone page.
Without quick connectors: installation manual QS006UI-YTD(R454B), p. 14, and service manual SM_ODUMULTI_R454B_3D INV_US1_NA_2403, pp. 3-4, which give the same values. With quick connectors: installation manual only, badly extracted table, values not confirmed. Average and remainder: AirGreen calculation.
Before choosing a 4-zone system: five sourced answers
Can the 18K take four heads?
No. Every Senville page that gives a figure for the SENA-18HF-MOA stops at three heads. A fourth room needs the 28K or a larger unit; the 18K remains a fit for two or three rooms.
senville.ca: SENA/18HF/D kit and 9,000 BTU multi-zone wall head, October 26, 2026; Build Your Own page, October 14, 2026; fr.senville.ca, Multizone catalogue, October 26, 2026.Does the 28K really take four heads?
Yes, per four English pages out of five: “2-4” in the SENA/30HF/D and SENA/30HF/T kit spec tables, “(2-4 Zones)” in the outdoor-unit title and “2 to 4 Zones” on the 9,000 head page. The SENA/30HF/DIC ceiling-cassette kit (“2-3”, re-read October 27, 2026) and the French title on fr.senville.ca (“(2 à 3 zones)”) say 2 to 3. Senville still sells no four-head kit on the 28K.
senville.ca: SENA/30HF/D and SENA/30HF/T kits, 9,000 BTU head and Quad-Zone page, October 26, 2026; outdoor-unit title, October 14, 2026; fr.senville.ca catalogue, October 26, 2026.Which lines do the heads of a four-head kit need?
They follow each head’s size: 1/4 in (liquid) and 3/8 in (gas) for a 9,000 or 12,000 head, 1/4 in and 1/2 in for an 18,000 head. The 36K’s 9,000 × 3 + 18,000 combination therefore takes three 1/4 · 3/8 lines and one 1/4 · 1/2; the other four combinations use 1/4 · 3/8 only.
Installation manual QS006UI-YTD(R454B), p. 18, and service manual SM_ODUMULTI_R454B_3D INV_US1_NA_2403, p. 3, read October 14, 2026.Which installation manual applies to a 4-zone system?
The multi-zone manual QS006UI-YTD(R454B), the one linked from the 36K Quad-Zone kit page; it is the one that gives the lengths with four heads. Manual CS019UI-EP(R454B), linked from other multi-zone kit pages, covers single-zone wall units and says nothing about multi-zone.
SENA/36HF/Q kit page, October 26, 2026; 18K and 28K kit pages, October 14, 2026, and SENA/48HF/F, October 26, 2026.Can a kit connect more BTU than its outdoor unit?
On paper, yes: the 9,000 × 3 + 18,000 combination connects 45,000 BTU of heads to a 36K certified at 36,000 BTU/h of cooling, and the 48K’s 12,000 × 4 connects 48,000 to 47,000. Senville publishes no derating rule for its MOA series; the combination is set at the visit, room by room.
SENA/36HF/Q and SENA/48HF/Q kit pages, October 26, 2026; NEEP rated cooling capacity, October 14, 2026; Build Your Own page, October 14, 2026.
Your Senville 4-zone system, sized for each room and installed by AirGreen.
We visit the four rooms, choose between the 28K, 36K and 48K for the heat you need at −15 °C, lay out the lines within the 80 m allowed, then the quote states the AHRI certificate of the unit chosen and its indicative LogisVert amount.
Applies to the whole Senville range
Sources
- Senville Canada, senville.ca: SENA/18HF/D, SENA/30HF/D, SENA/30HF/T, SENA/36HF/Q, SENA/36HF/DIC, SENA/36HF/TIC, SENA/48HF/Q and SENA/48HF/F kits, 9,000 BTU multi-zone wall head and Quad-Zone category, read October 26, 2026; Build Your Own page and outdoor-unit titles, read October 14, 2026.
- fr.senville.ca, Multizone catalogue (outdoor-unit and kit titles), read October 26, 2026.
- Multi-zone installation manual “MULTI-ZONE OUTDOOR UNIT AIR CONDITIONER”, QS006UI-YTD(R454B), senville.com, undated, read October 14, 2026.
- Service manual “MULTI OUTDOOR UNIT INVERTER SERIES”, SM_ODUMULTI_R454B_3D INV_US1_NA_2403, senville.com, read October 14, 2026.
- “Compatible Indoor Combinations for Senville Multi-Zone Systems” sheet (MOZ generation), senville.com, undated, read October 14, 2026.
- ENERGY STAR, Certified Air-Source Heat Pumps (dataset w7cv-9xjt), records 3630061, 3630064 and 3630067, and NEEP, Cold Climate Air Source Heat Pump List, AHRI certificates 215735314, 215735317 and 215735320: read October 14, 2026, re-checked unchanged October 26, 2026.
- Hydro-Québec, LogisVert eligible heat pump search tool: file read October 14, 2026, re-checked unchanged October 26, 2026.
LogisVert amounts are indicative: Hydro-Québec confirms them when you apply. Prices on quotation.