514-316-2973
sales@airgreen.ca
Two outdoor units take four heads: the RAM-G36N4HAA and the RAM-G42N5HAA. For the first, Hitachi publishes 28 quadruples, up to 48,000 BTU/h, 13 of them with an 18,000, 22,000 or 24,000 head. For the second, no table. Neither is ENERGY STAR Cold Climate, so LogisVert pays $50 per 1,000 BTU/h: $1,250 or $1,500. And we have not published any 4-zone installation yet.
4 zonesIndicative LogisVert, four non-ducted heads. Tap a row to open the system.
Each with four wall heads. A head of another type sometimes changes the certificate: we check it on quotation.
Set your four heads or start from an example home. The planner looks for your combination among the RAM-G36N4HAA’s 28 quadruples, and reminds you that the RAM-G42N5HAA is always confirmed with the distributor.
1 outdoor unit out of 4 takes these rooms according to Hitachi’s tables. The RAM-G42N5HAA is confirmed with the distributor.
Only 2 connections: 4 rooms do not fit.
MCA / MOP · 50 m of line set in total
See this system in our shopOnly 3 connections: 4 rooms do not fit.
MCA / MOP · 60 m of line set in total
See this system in our shop12,000 + 9,000 + 9,000 + 9,000 = 39,000 BTU/h: a combination listed in Hitachi’s table 3.7.
MCA / MOP 24 / 40 A · 70 m of line set in total
See this system in our shopHitachi publishes no combination table for this unit: we confirm each combination with the distributor.
MCA / MOP 30 / 50 A · 80 m of line set in total
See this system in our shopCombinations published by Hitachi (airHome Multi technical guide): RAM-G36N4HAA (table 3.7), 21 pairs, 32 triples and 28 quadruples, some with an 18,000, 22,000 or 24,000 head, 48,000 BTU/h at most. A combination missing from its unit’s list is not allowed. RAM-G42N5HAA: Hitachi publishes no combination table; we confirm each combination with the distributor. Mini-cassettes and floor consoles count as non-ducted in the certificates; a RAD-GJ ducted head changes the AHRI number. In its tables, Hitachi lists the largest mini-cassette as size “22” (RAI-GJ22QHAA): it is the RAI-GJ24QHAA we sell as 24,000 BTU/h (technical guide: 24,000 BTU/h cooling, 20,500 BTU/h heating). The planner counts it as 22,000 on the RAM-G36N4HAA. Example sizes: each room’s size is worked out during the visit. Full LogisVert rules (eligibility, deadlines, documents): our LogisVert page.
Table 3.7 of Hitachi’s guide lists 28 combinations of four heads for the RAM-G36N4HAA. Fifteen use only 7,000 to 12,000 heads; thirteen have one 18,000, 22,000 or 24,000 head, never two. The RAM-G42N5HAA has no table: every combination is confirmed with the distributor.
Sizes in thousands of BTU/h, as Hitachi writes them (table 3.7 of the technical guide, re-read in full Oct. 28, 2026). Size 22 is the RAI-GJ22QHAA mini-cassette, which we sell as the 24,000 BTU/h RAI-GJ24QHAA. The bar shows the total against the 48,000 BTU/h maximum connected capacity. Do the arithmetic: these are every combination of four table sizes that fits within 48,000 BTU/h, and no other. None has two heads above 12,000.
| Heads (BTU/h) | Total | RAM-G36N4HAA | RAM-G42N5HAA |
|---|---|---|---|
| 12,000 + 12,000 + 12,000 + 12,000 | 48,000 BTU/h | published | to confirmno table |
| 7,000 + 7,000 + 12,000 + 22,000 | 48,000 BTU/h | published | to confirmno table |
| 9,000 + 9,000 + 12,000 + 18,000 | 48,000 BTU/h | published | to confirmno table |
| 7,000 + 7,000 + 9,000 + 24,000 | 47,000 BTU/h | published | to confirmno table |
| 7,000 + 9,000 + 9,000 + 22,000 | 47,000 BTU/h | published | to confirmno table |
| 7,000 + 7,000 + 12,000 + 24,000 | 50,000 BTU/h | not allowedtotal too high | to confirmno table |
| 7,000 + 12,000 + 12,000 + 18,000 | 49,000 BTU/h | not allowedtotal too high | to confirmno table |
| 9,000 + 9,000 + 9,000 + 22,000 | 49,000 BTU/h | not allowedtotal too high | to confirmno table |
| 7,000 + 7,000 + 18,000 + 18,000 | 50,000 BTU/h | not allowedtotal too high | to confirmno table |
| 12,000 + 12,000 + 12,000 + 18,000 | 54,000 BTU/h | not allowedtotal too high | to confirmno table |
At the edge of the limit: the first five lines total 47,000 or 48,000 BTU/h and are in table 3.7; the next five go over 48,000 and are not. The RAM-G42N5HAA has no table.
A ducted head in the system changes the AHRI number, and the amount follows. Slide the number of ducted heads: on the RAM-G36N4HAA, the grant goes from $1,250 to $1,200, then $1,150 if all four are ducted. On the RAM-G42N5HAA, it drops to $0 with the first one.
NEEP and ENERGY STAR certificates re-checked Oct. 28, 2026; indicative LogisVert, list read Oct. 14, 2026, amounts recomputed Oct. 28, 2026 from the certificates. A mini-cassette or a floor console counts as non-ducted.
The RAM-G36N4HAA has a published table, a published fuse and a smaller cabinet. The RAM-G42N5HAA keeps one free connection, reaches further in line length and delivers more heat at -20°C, but Hitachi publishes no combination rule for it.
| RAM-G36N4HAA | RAM-G42N5HAA | |
|---|---|---|
| Connections, free after 4 heads | 4 · 0 | 5 · 1 |
| Hitachi table with 4 heads | 28 quadruples, 48,000 BTU/h at most | not published |
| Gas ports (in.) | 3/8 × 3 + 1/2 × 1 | 3/8 × 3 + 1/2 × 2 |
| Certified at -8.3°C | 25,000 BTU/h | 30,000 BTU/h 29,000 per the brochure |
| Maximum at -20°C | 18,300 BTU/h · COP 1.65 | 24,500 BTU/h · COP 1.8 |
| Maximum at 8.3°C | 42,000 BTU/h | 51,000 BTU/h |
| SEER2 / EER2 | 23 / 12.0 | 23 / 12.5 |
| HSPF2 Region IV / V (NEEP) | 9.3 / — brochure: 7.64 in Region V | 9.2 / 7.29 brochure: 7.2 in Region V |
| MCA / MOP | 24 / 40 A | 30 / 50 A (3 to 5 heads) |
| Recommended fuse (guide) | 25 A | not published |
| Total line set, total height | 70 m · 20 m | 80 m · 23 m |
| Cabinet | 850 × 800 × 298 mm · 74 kg | 950 × 945 × 370 mm · 98 kg |
| Drain, outdoor sound | 16 mm · 56 dB(A) | 26 mm · 58 dB(A) |
| LogisVert, 4 non-ducted heads | $1,250 | $1,500 |
airHome Multi brochures (EN and FR), technical guide (which does not cover the RAM-G42N5HAA) and NEEP certificates 216097708 and 215827114. Region V: NEEP gives no value for the RAM-G36N4HAA; for the RAM-G42N5HAA, NEEP certifies 7.29 and the brochure prints 7.2.
The whole range heats down to -20°C according to Hitachi. With four rooms, the certification changes, and the LogisVert rate with it.
Both are on the ENERGY STAR list (US market), without the cold-climate designation. LogisVert therefore pays $50 per 1,000 BTU/h certified at -8.3°C: 25 × $50 = $1,250 and 30 × $50 = $1,500.
Cold climate and Most Efficient, it earns $1,920, but it only has three connections and refuses 24,000 heads. The 3-zone page
The RAM-G36N4HAA drops out with its four connections. The RAM-G42N5HAA stands alone, with no published table, on the 30 / 50 A tier. The 5-zone page
The RAM-G36N4HAA has a published table (28 quadruples), 70 m of line set, 24 / 40 A and $1,250 of LogisVert. The RAM-G42N5HAA has no table, reaches 80 m, needs 30 / 50 A, earns $1,500 and keeps one free connection. The choice is made room by room, during the visit.
Yes on the RAM-G36N4HAA, with three small heads: its table lists 7 quadruples with an 18,000 head, such as 9,000 + 9,000 + 12,000 + 18,000, and 2 with a 24,000 head, 7,000 + 7,000 + 7,000 + 24,000 and 7,000 + 7,000 + 9,000 + 24,000. Two heads of 18,000 or more go over 48,000 BTU/h: not allowed. For the RAM-G42N5HAA, every combination is confirmed with the distributor.
Because that is how Hitachi lists it in its combination tables: the largest mini-cassette there is the RAI-GJ22QHAA, size 22, the head we sell as the 24,000 BTU/h RAI-GJ24QHAA. On the RAM-G36N4HAA, it leaves a little more room than a 24,000 wall head: 7,000 + 7,000 + 12,000 + 22,000 is published, 7,000 + 7,000 + 12,000 + 24,000 is not.
The only ENERGY STAR Cold Climate airHome Multi unit, the RAM-G24N3HAA, has only three connections. With four heads, only the RAM-G36N4HAA and the RAM-G42N5HAA remain, listed by ENERGY STAR (US market) without the cold-climate designation.
It changes the certificate. On the RAM-G36N4HAA, one ducted head among four gives mixed certificate 217549985, 24,000 BTU/h certified, so $1,200; four ducted heads give 216097711, 23,000 BTU/h, so $1,150. On the RAM-G42N5HAA, the first ducted head takes the grant to $0: certificates 217512354 and 215827115 are missing from the ENERGY STAR list.
Hitachi gives a maximum overcurrent protection (MOP) of 40 A for the RAM-G36N4HAA and 50 A for the RAM-G42N5HAA with 3 to 5 heads, with minimum circuit ampacities (MCA) of 24 A and 30 A. We check your panel during the visit.
No 4-zone article is published on our blog as of Oct. 28, 2026. Our published airHome Multi systems with a stated zone count are 2- and 3-zone; their articles are on those two pages.
Hitachi and AirGreen warranties: explained once for the whole brand, on the HITACHI page.
No question matches. Call us at 514 316-2973.
During the visit, we measure the four rooms and look for your combination among the RAM-G36N4HAA’s 28 quadruples. For the RAM-G42N5HAA, we have it confirmed with the distributor. The quotation comes with the AHRI number and the indicative LogisVert amount.
Hydro-Québec never solicits anyone by phone or door to door for LogisVert. If someone calls “on behalf of Hydro-Québec” to sell you a heat pump, hang up.
Monday to Thursday 8 a.m. to 6 p.m. · Friday 8 a.m. to 4 p.m.
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LogisVert amounts are indicative: the invoice must show the AHRI or ENERGY STAR number, and Hydro-Québec confirms eligibility and the amount when it processes the claim. Price on quotation.
