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AIO Vertical Stack XL

AIO Vertical Stack XL is the higher capacity version of the Vertical Stack.

The AIO Vertical Stack XL is the higher-capacity version of the Vertical Stack, designed to fit the same space as a VTAC. Its compact 23" x 24" footprint saves floor space and delivers up to 0.6" WC static pressure for direct venting or ducting. A unique feature: it installs on a corridor wall for full servicing without entering the room. A bathroom exhaust connects to the dedicated stale-air outlet on either side. Available with or without integrated ERV, venting outside or through ductwork.

Key Features

Compact unit
Easy to install
High ESP for internal and external ducting
Extraordinary flexible ducting
Bathroom exhaust connection
Auto-restart
Washable filters

Options

900/1,800W electric heat
With or without ERV
230V
Hardwire or LCDI cord
R32
MERV 13 filtration on return air

Operation

Cool, heat, dehumidify, and auto
Selectable fan speeds, low, med, high, and auto
Fresh air ERV - field configurable amount of fresh air (with optional ERV Module)

Mounting

Vertical

Airflow

22" x 31" external vent
Available 0.7" WC for external ducting, adapters, and louvers
Available 0.6" WC for internal ducting and louvers

Included controls

Onboard touch controller for diagnostics and programing

Optional controllers

WiFi app for Android and iPhone
Wall Mounted Advanced touchscreen with a 7‑day program
Wall Mounted Basic touch controller
Third party thermostat interface
BACnet/Modbus interface

Extraordinarily Flexible Ducting

Model V’s powerful backward centrifugal ECM fan facilitates efficient condenser air movement through ductwork, enabling flexible placement within a room or apartment. Unlike traditional VTACs, it doesn’t require an outside wall. The design allows air supply from the top or both sides, with flexible condenser intake options (left, right, or rear). Flexible ducting choices with 0.7 in. W.C. make Model V versatile for installation without restrictions in any dwelling area.

Outside air
Recirculate air
Fresh air intake
Stale air exhaust

No Access Required

The versatile design of AIO makes the system extremely reliable and inexpensive to maintain. If a repair is needed, a single unit can be taken off-line without affecting the entire system. It's possible to install AIO Vertical stack XL on the corridor wall of each apartment/hotel room so that all maintenance can be achieved from a common area - at any time, which means no maintenance personnel needs to enter the unit.

AIO Vertical Stack XL serviced from the corridor — no room access required

Installation

What's Inside

AIO Vertical Stack XL internal components diagram

Key Specifications

High Performance

Heat Pump only	95°F¹	105°F²	115°F³
Capacity
Maximum (kBtu/h)	24.0	22.0	21.0
Recommended (kBtu/h)*	22.0	20.5	18.5
Nominal (kBtu/h)	20.3	18.3	17.5
Minimum(kBtu/h)	4.5	4.5	3.1
Power Input
Maximum (kW)	2.35	2.32	2.36
Recommended (kW)*	2.05	2.25	2.31
Nominal (kW)	1.74	1.96	2.15
Minimum (kW)	0.34	0.36	0.36
Efficiency
Maximum	10.23	9.48	8.91
Recommended*	10.76	9.11	8.01
Nominal	11.65	9.36	8.15
SEER2***	13.91	-	-
Moisture removal (Pts/h)	1.9	2.1	2.31

1: 95°F; ID: 80°F, W.B. 67°F;; OD: 95°F, W.B. 75°F
2: 105°F; ID: 80°F, W.B. 67°F;; OD: 105°F, W.B. 75°F
3: 115°F; ID: 80°F, W.B. 67°F;; OD: 115°F, W.B. 75°F

* This is the recommended capacity for sizing the unit to the space.

***SEER2 does not apply to PTHP-type units and is shown solely to enable comparison with similar heat pump systems. Values are for reference and comparison purposes only.

Heat Pump only**	47°F¹	17°F²	5°F³	0°F⁴	-5°F⁵
Capacity
Maximum (kBtu/h)	24.0	17.5	12.5	9.5	8.2
Recommended (kBtu/h)*	20.0	11.6	9.3	8.3	7.6
Nominal (kBtu/h)	17.3	10.4	8.3	7.4	6.8
Minimum(kBtu/h)	5.0	4.15	3.85	3.85	3.85
Power Input
Maximum (kW)	2.34	2.28	2.21	2.38	2.38
Recommended (kW)*	1.80	1.48	1.39	1.40	1.23
Nominal (kW)	1.42	1.29	1.21	1.22	1.06
Minimum (kW)	0.32	0.35	0.34	0.37	0.40
Efficiency
Maximum	3.01	2.25	1.66	1.2	1.0
Recommended	3.3	2.3	1.96	1.74	1.81
Nominal	3.56	2.37	2.01	1.79	1.88
Minimum	4.58	3.53	3.28	3.07	2.8
HSPF2***	9.12	-	-	-	-

1: 47°F; ID: 70°F, W.B. 60°F;; OD: 47°F, W.B. 43°F
2: 17°F; ID: 70°F, W.B. 60°F;; OD: 17°F, W.B. 13°F
3: 5°F; ID: 70°F, W.B. 60°F;; OD: 5°F, W.B. 3°F
4: 0°F; ID: 70°F, W.B. 60°F;; OD: 0°F
5: -5°F; ID: 70°F, W.B. 60°F;; OD: -5°F

* This is the recommended capacity for sizing the unit to the space.

** The tables show Heat Pump performance only. An electric heating element can be added to provide an additional output of 3,100 or 6,100 BTU/h.

***SEER2 does not apply to PTHP-type units and is shown solely to enable comparison with similar heat pump systems. Values are for reference and comparison purposes only.

High Efficiency

Heat Pump only	95°F¹	105°F²	115°F³
Capacity
Maximum (kBtu/h)	24.0	22.0	21.0
Recommended (kBtu/h)*	22.0	20.5	18.5
Nominal (kBtu/h)	11.6	18.3	17.5
Minimum(kBtu/h)	4.5	4.5	3.1
Power Input
Maximum (kW)	2.35	2.32	2.36
Recommended (kW)*	2.05	2.25	2.31
Nominal (kW)	1.74	1.96	2.15
Minimum (kW)	0.34	0.36	0.36
Efficiency
Maximum	10.23	9.48	8.91
Recommended*	10.76	9.11	8.01
Nominal	11.65	9.36	8.15
SEER2***	15.4	-	-
Moisture removal (Pts/h)	1.9	2.1	2.31

1: 95°F; ID: 80°F, W.B. 67°F;; OD: 95°F, W.B. 75°F
2: 105°F; ID: 80°F, W.B. 67°F;; OD: 105°F, W.B. 75°F
3: 115°F; ID: 80°F, W.B. 67°F;; OD: 115°F, W.B. 75°F

* This is the recommended capacity for sizing the unit to the space

***SEER2 does not apply to PTHP-type units and is shown solely to enable comparison with similar heat pump systems. Values are for reference and comparison purposes only.

Heat Pump only**	47°F¹	17°F²	5°F³	0°F⁴	-5°F⁵
Capacity
Maximum (kBtu/h)	24.0	17.5	12.5	9.5	8.2
Recommended (kBtu/h)*	20.0	11.4	9.2	8.3	7.6
Nominal (kBtu/h)	14.2	10.4	8.3	7.4	6.8
Minimum(kBtu/h)	5.0	4.15	3.85	3.85	3.85
Power Input
Maximum (kW)	2.34	2.28	2.21	2.38	2.38
Recommended (kW)*	1.80	1.45	1.20	1.40	1.23
Nominal (kW)	1.42	1.29	1.21	1.22	1.06
Minimum (kW)	0.32	0.35	0.34	0.37	0.40
Efficiency
Maximum	3.01	2.25	1.66	1.2	1.0
Recommended	3.3	2.3	2.25	1.74	1.81
Nominal	3.56	2.37	2.01	1.79	1.88
Minimum	4.58	3.53	3.28	3.07	2.8
HSPF2***	9.15	-	-	-	-

1: 47°F; ID: 70°F, W.B. 60°F;; OD: 47°F, W.B. 43°F
2: 17°F; ID: 70°F, W.B. 60°F;; OD: 17°F, W.B. 13°F
3: 5°F; ID: 70°F, W.B. 60°F;; OD: 5°F, W.B. 3°F
4: 0°F; ID: 70°F, W.B. 60°F;; OD: 0°F
5: -5°F; ID: 70°F, W.B. 60°F;; OD: -5°F

* This is the recommended capacity for sizing the unit to the space.

** The tables show Heat Pump performance only. An electric heating element can be added to provide an additional output of 3,100 or 6,100 BTU/h.

***SEER2 does not apply to PTHP-type units and is shown solely to enable comparison with similar heat pump systems. Values are for reference and comparison purposes only.

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