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The basement unit is chosen with the heat pump. Its backup heat comes next.
Electric heat is sold separately. It is a kit installed in the unit, and each size has its allowed outputs. Pick the size and the refrigerant: you see the units, and the backup heat the manufacturer allows for each one.
Which size, which refrigerant, which backup heat?
The outputs come from the heat-kit table printed for each family. Backup heat does not change the heat pump size: it steps in when the heat pump needs help.
Size
Heat pump refrigerant
The indoor unit’s refrigerant must match the heat pump’s: R-454B with the D5CUHA, R-410A with the others. The exact pairing is confirmed with its AHRI number.
Electric backup heat allowed, from each unit’s manufacturer table.
Kits sold here that fit at least one of these units: EHK05AKB, EHK10AKB.
Electric backup heat allowed, from each unit’s manufacturer table.
Kits sold here that fit at least one of these units: EHKMC05KN, EHKMC08KN, EHKMC10KN.
Also at this size: D5FUHAH24XAK set to 18K: 5, 8, 10 kW (D5FUHA31-01PD, p. 4).
Electric backup heat allowed, from each unit’s manufacturer table.
No kit sold here fits these units: the DLFUAA’s kit is still to be confirmed, and the FJMA4X’s EHC kits are not on our site.
Electric backup heat allowed, from each unit’s manufacturer table.
Kits sold here that fit at least one of these units: EHKMC05KN, EHKMC08KN, EHKMC10KN.
Electric backup heat allowed, from each unit’s manufacturer table.
Kits sold here that fit at least one of these units: EHK05AKB, EHK10AKB, EHK15AKF, EHK20AKF.
Electric backup heat allowed, from each unit’s manufacturer table.
Kits sold here that fit at least one of these units: EHKMC05KN, EHKMC08KN, EHKMC10KN.
Also at this size: D5FUHAH36XAK set to 30K: 5, 8, 10, 15 kW (D5FUHA31-01PD, p. 4).
Electric backup heat allowed, from each unit’s manufacturer table.
Kits sold here that fit at least one of these units: EHK05AKB, EHK10AKB, EHK15AKF, EHK20AKF.
Electric backup heat allowed, from each unit’s manufacturer table.
Kits sold here that fit at least one of these units: EHKMC05KN, EHKMC08KN, EHKMC10KN, EHKMC20KN.
Electric backup heat allowed, from each unit’s manufacturer table.
Kits sold here that fit at least one of these units: EHK05AKB, EHK10AKB, EHK15AKF, EHK20AKF, EHK25AHCF, EHK30AHCF.
Electric backup heat allowed, from each unit’s manufacturer table.
Kits sold here that fit at least one of these units: EHKMC08KN, EHKMC10KN, EHKMC20KN.
Also at this size: D5FUHAH60XAK set to 48K: 8, 10, 15, 20 kW (D5FUHA31-01PD, p. 4).
Electric backup heat allowed, from each unit’s manufacturer table.
Kits sold here that fit at least one of these units: EHK05AKB, EHK10AKB, EHK15AKF, EHK20AKF, EHK25AHCF, EHK30AHCF.
Electric backup heat allowed, from each unit’s manufacturer table.
Kits sold here that fit at least one of these units: EHKMC10KN, EHKMC20KN, EHKMC25KN.
Crossover air handler D5FUAA
D5FUAAH18XAKEHKMC kits allowed: 5, 8, 10 kW. Sold here: EHKMC05KN, EHKMC08KN, EHKMC10KN.
D5FUAA31-01PD, ed. 03/25, p. 6
See the product →Air handler DLFUAA
DLFUAAH18XAKWe do not have the manufacturer’s data sheet: the heat kit is confirmed with the full model number.
manufacturer data sheet not available
See the product →Fan coil FJMA4X
FJMA4X18L0ABEHC kits allowed: 5, 8, 10 kW. EHC kits are not sold on our site.
FJM-31-01PD, ed. 06/25, p. 15
See the product →Fan coil FXM4X
FXM4X1800ALEHK kits allowed: 5, 8, 10 kW. Sold here: EHK05AKB, EHK10AKB.
496 31 5402 05, ed. 09/20, p. 11
See the product →Crossover air handler D5FUAA
D5FUAAH24XAKEHKMC kits allowed: 5, 8, 10 kW. Sold here: EHKMC05KN, EHKMC08KN, EHKMC10KN.
D5FUAA31-01PD, ed. 03/25, p. 6
See the product →Crossover air handler D5FUHA
D5FUHAH24XAKEHKMD kits allowed: 5, 8, 10, 15 kW. EHKMD kits are not sold on our site.
D5FUHA31-01PD, ed. 03/25, p. 4
See the product →Air handler DLFUAA
DLFUAAH24XAKWe do not have the manufacturer’s data sheet: the heat kit is confirmed with the full model number.
manufacturer data sheet not available
See the product →Fan coil FJMA4X
FJMA4X24L0BCEHC kits allowed: 5, 8, 10, 15 kW. EHC kits are not sold on our site.
FJM-31-01PD, ed. 06/25, p. 15
See the product →Crossover air handler D5FUAA
D5FUAAH30XAKEHKMC kits allowed: 5, 8, 10 kW. Sold here: EHKMC05KN, EHKMC08KN, EHKMC10KN.
D5FUAA31-01PD, ed. 03/25, p. 6
See the product →Air handler DLFUAA
DLFUAAH30XAKWe do not have the manufacturer’s data sheet: the heat kit is confirmed with the full model number.
manufacturer data sheet not available
See the product →Fan coil FJMA4X
FJMA4X30L0BBEHC kits allowed: 5, 8, 10, 15, 20 kW. EHC kits are not sold on our site.
FJM-31-01PD, ed. 06/25, p. 15
See the product →Fan coil FEM4X
FEM4X3000BLEHK kits allowed: 5, 8, 10, 15, 20 kW. Sold here: EHK05AKB, EHK10AKB, EHK15AKF, EHK20AKF.
496 31 5601 03, ed. 04/21, p. 11
See the product →Crossover air handler D5FUAA
D5FUAAH36XAKEHKMC kits allowed: 5, 8, 10, 20 kW. Sold here: EHKMC05KN, EHKMC08KN, EHKMC10KN, EHKMC20KN.
D5FUAA31-01PD, ed. 03/25, p. 6
See the product →Crossover air handler D5FUHA
D5FUHAH36XAKEHKMD kits allowed: 5, 8, 10, 15, 20 kW. EHKMD kits are not sold on our site.
D5FUHA31-01PD, ed. 03/25, p. 4
See the product →Air handler DLFUAA
DLFUAAH36XAKWe do not have the manufacturer’s data sheet: the heat kit is confirmed with the full model number.
manufacturer data sheet not available
See the product →Fan coil FJMA4X
FJMA4X36L0BBEHC kits allowed: 5, 8, 9, 10, 15, 20 kW. EHC kits are not sold on our site.
FJM-31-01PD, ed. 06/25, p. 15
See the product →Fan coil FCM4X
FCM4X3600ALEHK kits allowed: 5, 8, 9, 10, 15, 20 kW; the table also lists EHC communicating kits, up to 24 kW on this size (not sold here). Sold here: EHK05AKB, EHK10AKB, EHK15AKF, EHK20AKF.
496 31 4202 02, 5/2018, p. 12
See the product →Fan coil FEM4X
FEM4X3600BLEHK kits allowed: 5, 8, 9, 10, 15, 20 kW. Sold here: EHK05AKB, EHK10AKB, EHK15AKF, EHK20AKF.
496 31 5601 03, ed. 04/21, p. 11
See the product →Crossover air handler D5FUAA
D5FUAAH48XAKEHKMC kits allowed: 8, 10, 20 kW. Sold here: EHKMC08KN, EHKMC10KN, EHKMC20KN.
D5FUAA31-01PD, ed. 03/25, p. 6
See the product →Air handler DLFUAA
DLFUAAH48XAKWe do not have the manufacturer’s data sheet: the heat kit is confirmed with the full model number.
manufacturer data sheet not available
See the product →Fan coil FJMA4X
FJMA4X48L0CBEHC kits allowed: 5, 8, 9, 10, 15, 20, 24, 30 kW. EHC kits are not sold on our site.
FJM-31-01PD, ed. 06/25, p. 15
See the product →Fan coil FVM4X
FVM4X4800BLEHK kits allowed: 5, 8, 9, 10, 15, 20, 24, 30 kW. Sold here: EHK05AKB, EHK10AKB, EHK15AKF, EHK20AKF, EHK25AHCF, EHK30AHCF.
496 31 5104 03, ed. 11/21, p. 15
See the product →Crossover air handler D5FUAA
D5FUAAH60XAKEHKMC kits allowed: 10, 20, 25 kW. Sold here: EHKMC10KN, EHKMC20KN, EHKMC25KN.
D5FUAA31-01PD, ed. 03/25, p. 6
See the product →Crossover air handler D5FUHA
D5FUHAH60XAKEHKMD kits allowed: 10, 15, 20, 25 kW. EHKMD kits are not sold on our site.
D5FUHA31-01PD, ed. 03/25, p. 4
See the product →Air handler DLFUAA
DLFUAAH60XAKWe do not have the manufacturer’s data sheet: the heat kit is confirmed with the full model number.
manufacturer data sheet not available
See the product →Fan coil FJMA4X
FJMA4X60L0DBEHC kits allowed: 5, 8, 9, 10, 15, 20, 24, 30 kW. EHC kits are not sold on our site.
FJM-31-01PD, ed. 06/25, p. 15
See the product →Fan coil FVM4X
FVM4X6000BLEHK kits allowed: 5, 8, 9, 10, 15, 20, 24, 30 kW. Sold here: EHK05AKB, EHK10AKB, EHK15AKF, EHK20AKF, EHK25AHCF, EHK30AHCF.
496 31 5104 03, ed. 11/21, p. 15
See the product →All 27 ARCOAIRE indoor units, right below.
Each product gives the model, the refrigerant and the size. Electric heat is ordered separately, on the parts page. Pricing by quote.
These are fan coils and air handlers.
Three words you hear for the basement unit, and what each one means.
Fan coil
The manufacturer’s word for the indoor unit that blows air through the ducts, matched with a heat pump or an air conditioner. Electric heat is an add-on option.
Brochure 496 32 2600 02, 12/19; 496 31 5104 03, ed. 11/21, p. 1
Crossover air handler
The brand’s name for the D5FUAA and D5FUHA, two R-454B units. For them, electric heat needs its own power supply; the D5FUAA has no single-point connection.
DLS-045-AR-00, 4/2025, p. 3; D5FUAA31-01PD, pp. 1 and 6; D5FUHA31-01PD, pp. 1 and 11
“Electric furnace”
That is this page’s name on our site: it is the word people search for. The manufacturer treats the electric furnace and the fan coil as two different indoor units.
AC-006-AR-00, 12/2022, p. 2
Eight families, four series of heat kits.
Each family has its kit series; the FCM4X has two (EHK and EHC communicating kits). EHK and EHKMC kits are on our site; EHKMD and EHC kits are not.
| Family | Refrigerant | Products | Sizes (tons) | Backup heat allowed, by size | Kits sold here | Document | |
|---|---|---|---|---|---|---|---|
| ARCOAIRE indoor units | |||||||
| D5FUAA Crossover air handler | R-454B | 6 | 1.5 · 2 · 2.5 · 3 · 4 · 5 | EHKMC · 5–25 kW | EHKMC05KN, EHKMC08KN, EHKMC10KN, EHKMC20KN, EHKMC25KN | D5FUAA31-01PD, ed. 03/25, p. 6 | |
| D5FUHA Crossover air handler | R-454B | 3 | 2 · 3 · 5 | EHKMD · 5–25 kW | none | D5FUHA31-01PD, ed. 03/25, p. 4 | |
| DLFUAA Air handler | R-410A | 6 | 1.5 · 2 · 2.5 · 3 · 4 · 5 | to be confirmed | none | manufacturer data sheet not available | |
| FJMA4X Fan coil | R-410A | 6 | 1.5 · 2 · 2.5 · 3 · 4 · 5 | EHC · 5–30 kW | none | FJM-31-01PD, ed. 06/25, p. 15 | |
| FCM4X Fan coil | R-410A | 1 | 3 | EHK · 5–20 kW; EHC · 9–24 kW | EHK05AKB, EHK10AKB, EHK15AKF, EHK20AKF | 496 31 4202 02, 5/2018, p. 12 | |
| FVM4X Fan coil | R-410A | 2 | 4 · 5 | EHK · 5–30 kW | EHK05AKB, EHK10AKB, EHK15AKF, EHK20AKF, EHK25AHCF, EHK30AHCF | 496 31 5104 03, ed. 11/21, p. 15 | |
| FXM4X Fan coil | R-410A | 1 | 1.5 | EHK · 5–10 kW | EHK05AKB, EHK10AKB | 496 31 5402 05, ed. 09/20, p. 11 | |
| FEM4X Fan coil | R-410A | 2 | 2.5 · 3 | EHK · 5–20 kW | EHK05AKB, EHK10AKB, EHK15AKF, EHK20AKF | 496 31 5601 03, ed. 04/21, p. 11 | |
Outputs from each family’s table, without the three-phase-only kits. The 24 and 30 kW kits arrive three-phase and convert to single phase on site. We do not have the manufacturer’s data sheet for the DLFUAA: it is the indoor unit of the certified DLCURA + DLFUAA systems on the central heat pump page.
Three things the manufacturer’s data tells you.
The D5FUAA can run on 115 V.
The manufacturer calls it 115 V conversion capable. On the 18K and 24K, the minimum circuit ampacity is then 5.5 A, versus 4 A at 208/230 V.
D5FUAA31-01PD, ed. 03/25, pp. 4 and 9Leak detected: the D5FUAA blows at full speed.
If its sensor detects a refrigerant leak (code EHC1 or EHC2), the unit switches to TURBO mode until the code clears, and it beeps: that is expected. The manufacturer then says to call a technician as soon as possible.
D5FUAA31-01PD, ed. 03/25, p. 18The large FJM units come in a two-piece version.
From sizes 42 to 60, the FJM fan coil comes in a two-piece modular version, which makes attic and crawl space installs easier.
FJM-31-01PD, ed. 06/25, p. 1What people ask us about these units.
Is it really a furnace?
Not in the manufacturer’s sense. They are fan coils and air handlers: they blow the air the heat pump heats or cools. With an electric heat kit, they add their own heat when the heat pump is not enough.
Is electric heat included?
No. It is a kit sold separately, and each unit size has its allowed outputs in the manufacturer’s table. On the D5FUAA and D5FUHA, it needs its own power supply.
Which heat pump goes with which unit?
The certified pairings are published: D5FUAA and D5FUHA with the D5CUHA, DLFUAA with the DLCURA, on the central heat pump page. The manufacturer also pairs the FJMA4X with the R4H5S in its tables. For the others, the pairing and its AHRI rating are confirmed before the quote.
I only replace the unit in the basement: is that possible?
Yes, if the outdoor heat pump or air conditioner stays compatible: same refrigerant and a recognized pairing. We check the outdoor model at the visit.
What about LogisVert?
Indicative amounts appear on complete-system product sheets: here, the six DLFUAA products paired with the DLCURA. Only Hydro-Québec confirms the amount granted.
How do you choose the backup heat output?
At the visit: we look at the house and the electrical panel. Then we pick an output allowed for the unit size, from the manufacturer’s table.
The right unit in the basement, with the right backup heat.
We look at the heat pump, the ductwork and the panel, then give you a quote with the indoor unit, its heat kit and the system’s AHRI number when it has one.
Sources checked on October 29, 2026
- ARCOAIRE, product data D5FUAA31-01PD (ed. 03/25), pp. 4, 6, 9 and 18: Crossover air handler, EHKMC kits, power, leak detection.
- ARCOAIRE, product data D5FUHA31-01PD (ed. 03/25), pp. 1, 4 and 11: Crossover air handler, EHKMD kits and size settings, separate power supply.
- ARCOAIRE, product specifications FVM4X 496 31 5104 03 (ed. 11/21), pp. 1 and 15; FCM4X 496 31 4202 02 (5/2018), p. 12 (EHK and EHC); FXM4X 496 31 5402 05 (ed. 09/20), p. 11; FEM4X 496 31 5601 03 (ed. 04/21), p. 11: EHK kits; R-410A refrigerant (FVM, FXM, FEM p. 1, FCM p. 5).
- ARCOAIRE, product data FJM-31-01PD (ed. 06/25), pp. 1 and 15: R-410A refrigerant, modular version, EHC kits.
- ARCOAIRE, brochure 496 32 2600 02 (12/19); brochure DLS-045-AR-00 (4/2025), p. 3; brochure AC-006-AR-00 (12/2022), p. 2: unit names.
- ARCOAIRE, product data R4H5S-01PD (ed. 09/22), pp. 12 to 16: pairings with the FJMA4X.
- airgreen.ca product sheets, re-read October 29, 2026.
LogisVert amounts are indicative. Only Hydro-Québec confirms the amount granted. Pricing by quote.
