YORK R Series 20 SEER Ducted Air Conditioner | 42000 BTU

Distribute comfort throughout the rooms while keeping the equipment out of sight

For a renovation in Montreal, an office floor in Laval or a residence on the South Shore, we can study an air-conditioning system that integrates with the architecture rather than taking up space on the walls. The YORK R Series ducted system follows this approach: its indoor unit is concealed in a utility space and distributes air through ducts connected to wall or ceiling grilles. The YORK brochure expressly presents this installation option above a suspended ceiling or in a suitable storage space.

At AirGreen, we evaluate this solution by starting with the spaces to be served. We examine where occupants want more cooling, the available paths for the ducts and the access that must be preserved after the work. A ducted installation must be designed as a whole: the equipment, air distribution network, control and integration with the building.

The 42,000 BTU version has an efficiency rating of 16 SEER

We distinguish the series name from the performance of the proposed combination. The R Series is presented in the catalog as a family reaching up to 20 SEER, but the column for the ducted model DHR42NDB21S, on printed page 19 of the brochure, indicates 16 SEER, 9.5 EER and 9 HSPF. These are the values that describe this version.

Our product sheet identifies the system by the outdoor unit DHR42CSB21S, the indoor unit DHR42NDB21S and reference AHRI 8578469. The catalog also associates these two models in its presentation of the R Series configurations.

The indoor data comes from the ducted-system table; the refrigerant and outdoor sound pressure are listed in the table for the DHR42CSB21S. We retain the SEER, EER and HSPF designations used by YORK without presenting them as SEER2, EER2 or HSPF2 ratings.

The difference between 42,000 BTU, used to identify the category, and 39,500 BTU/h, published as the nominal cooling capacity, should be retained in a technical comparison. We assess the building's needs based on documented performance, not solely on the figure stated in the product title.

A ducted heat pump, despite being called an "air conditioner"

We present this YORK as a unit capable of cooling and heating. The manufacturer's table classifies the ducted unit as a heat pump, and the outdoor unit uses an inverter-controlled variable-speed compressor. YORK describes this modulation as a way to adjust operation rather than reproduce the abrupt starts and stops of a conventional system.

For our selection, we therefore seek to understand needs during occupied periods, but also when the building is quieter. We ask which spaces are used all day, which rooms are used occasionally, and whether the current problems concern temperature, noise, or air distribution.

We do not infer a savings percentage from the 16 SEER efficiency rating alone. To prepare a relevant energy estimate, we would need to know the equipment being replaced, usage habits, and the building's characteristics.

Four ventilation settings to adjust air distribution

The DHR42NDB21S has four documented airflow levels. The YORK table associates each setting with an indoor sound pressure level.

We use these reference points to discuss the project's priorities. In an office where conversations need to remain easy, we examine the ventilation setting along with the air handler's location. In a large living area, we also work on the grille positions and the distribution among the different branches.

One catalog detail deserves attention: the DHR36NDB21S and DHR42NDB21S ducted units list the same four airflow rates, even though their nominal cooling capacities are respectively 34,000 and 39,500 BTU/h. Choosing the higher category therefore does not automatically mean getting more air to distribute. We take this into account before proposing a replacement to correct an inadequately served room.

A shared setpoint to organize according to room usage

This combination belongs to single-zone systems: one outdoor unit is paired with one indoor unit. We do not present multiple grilles as equivalent to several independent units, each adjustable to a different temperature.

Let us take a design example in Longueuil: a reception area, two offices, and a meeting room need to be served. We would begin by clarifying the occupancy hours and expectations for each space. A room used two hours a day raises different questions from an office occupied continuously.

We would then examine the air-distribution layout, the return-air path, and the controller location. If occupants request significantly different temperatures or completely separate schedules, we would study a different system arrangement rather than promise independence that this single-zone combination does not provide by default.

An included wired controller and a Wi-Fi option to be defined

The catalogue page for the ducted system presents the standard DWCR wired controller. Our sales sheet, meanwhile, indicates optional Wi-Fi. We distinguish these two elements in the quotation: the control supplied with the unit and any accessory added for remote control.

We recommend clarifying from the outset who will use the control and which functions are actually desired. For a commercial space, we can discuss schedules and setpoint management. For a residence, we can examine the request for phone-based access. The compatible module, its app, and its availability must be confirmed before including these functions in the proposal.

Heating down to −18 °C: maintaining a realistic view of performance

The advertised outdoor operating limit in heating mode for the DHR42CSB21S is −18 °C, with a published range extending up to 24 °C. This indication does not mean that the system delivers its nominal capacity of 44 000 BTU/h at −18 °C. The catalogue's nominal heating conditions use an outdoor temperature of approximately 8 °C.

In this table, we do not have detailed capacity and coefficient-of-performance data at −15 °C or −18 °C. We therefore do not reconstruct them from the nominal capacity.

For a heating project in Montréal, on the North Shore or in Montérégie, we define with you the expected contribution of the heat pump and the role of the existing heating system. Our data sheet identifies this combination as not ENERGY STAR® certified for cold climates; we do not present it as a solution that automatically replaces any other heating source.

Design concealed components with as much care as visible grilles

Confirm the required clearance before closing the ceiling

A document review is necessary regarding the indoor dimensions. The brochure prints 48.3 × 30.5 × 1 in., while giving 1,219 × 787 × 279 mm on the same line. These two sets of measurements do not agree. We therefore do not use the 1 in. height as an installation specification.

In addition to the brochure, the YORK technical data sheet DFS-42RHPND-2020, specific to this combination, indicates 48.22 × 30.51 × 11.41 in. for the indoor cabinet, in the order width × depth × height. For the outdoor unit, the dimensions in this data sheet, given in the same order, are 37.79 × 16.14 × 53.14 in.

We use these measurements for the preliminary study, then have the plan corresponding to the planned equipment confirmed. The cabinet volume alone does not represent the space required for the project: we also allow room for connections, transitions to the ducts, and the service opening.

We recommend validating this layout before finishing work begins. An access panel must be placed where servicing will be possible, not simply where it appears least visible.

Have the static pressure applicable to the system confirmed

The brochure states a range of 0 to 0.8 in. of water column for the DHR42NDB21S. However, the dedicated technical data sheet consulted in addition indicates 0 to 0.4 in. of water column for external static pressure. We point out this discrepancy rather than arbitrarily choosing the more favorable value.

Before determining the dimensions and routing of the ducts, we have the applicable limit and ventilation data confirmed. The maximum airflow of 1,180 ft³/min is not a guaranteed airflow for every system.

Our study must specify the lengths, changes in direction, transitions, and grilles selected. We examine these elements together rather than adding outlets without verifying their impact on distribution.

Plan for power supplies to both units

The published rated voltage is 208/230 V, single-phase, 60 Hz. YORK specifies that the indoor and outdoor units require separate electrical supplies. We include this point in the scope of work from the initial assessment.

The outdoor values appear in the outdoor unit table; those for the indoor unit appear in the ducted-unit table. We use them to prepare the electrical validation without confusing them with the unit's continuous power consumption.

We have the wiring and protection devices determined according to the nameplates and site conditions. For a replacement, we request verification of the existing circuits before considering them reusable.

Separate three routes: air, refrigerant, and condensate

The refrigerant connection for this system uses a 3/8 in. liquid line and a 5/8 in. gas line. The catalogue specifies a maximum total length of 50 metres and a maximum height difference of 15 metres between the units. These limits concern the refrigerant piping, not the air ducts.

We therefore draw the distribution network to the rooms and the connection between the units separately. We also specify the visible sections, building penetrations, and associated finishing work. A maximum length allowed by the manufacturer is not automatically a length included in the price.

The ducted unit has an internal condensate pump, and its technical page specifies a drainage connection with an outer diameter of 1 in. We plan the route for this drain at the same time as the other connections, with access for future inspections.

Our work in Laval: correct the ductwork before blaming the unit

In an AirGreen project published about a retail store in Laval, we had identified unsealed duct connections, leaks in the return-air plenum, and the absence of vibration isolation support on a main section. We accompanied the inspection with airflow, static pressure, and supply-air temperature measurements.

The work included redoing the fastenings, insulation work, sealing the joints, and rebalancing the distribution. Our report specifically notes the elimination of the observed vibrations and an average acoustic improvement of 6 dB(A) in the sales area. These results concern this project, not a test of the YORK DHR42NDB21.

We draw one useful rule for your project from this: when a space remains uncomfortable, we examine the distribution and supports before concluding that the equipment's capacity simply needs to be increased.

Organize the handover around three checks

For a ducted installation, we propose a structured handover:

1. Refrigeration circuit: check the connections and perform the evacuation specified in the manufacturer's instructions.
2. Water drainage: check that the drainage works properly and that the relevant components are accessible.
3. Indoor air distribution: check the selected settings and the distribution of air to the different outlets.

The YORK installation manual, consulted as a supplement to the catalogue, expressly calls for checking for leaks at the connections and using a vacuum pump rather than purging air with refrigerant.

We also want the handover to cover the controls, filtration, and maintenance access points. We recommend keeping the references for both units, their serial numbers, and the accessories installed with the invoice.

Maintain the network and recognize a drainage signal

Our maintenance experience in a downtown Montreal store illustrates the value of looking beyond the outdoor unit. In this published project, the measurements revealed dust buildup in certain branches and an airflow imbalance. The work included cleaning, checking the filters, adjusting the balancing dampers, and adapting the operating schedules. This project involved a different commercial system.

For your YORK ducted system, we recommend easy access to the filters and regular drainage monitoring. Any change to the air distribution should also be reported: we want to know whether the problem affects all grilles or only one room.

The R Series manual identifies code E9 as a protection associated with the water level. This code is not enough to conclude that the pump is defective, but it guides the technical inspection. If this message appears or there is any sign of water, we recommend having the unit inspected rather than repeatedly restarting it.

Compare the complete submission, not just the price of the indoor unit

We prepare the price for a YORK ducted installation by distinguishing the equipment from the work required to integrate it. The quote must specify the controls, ductwork, grilles, supports, drainage, electrical and refrigerant connections, as well as testing.

We also request that openings and finishing work be clearly assigned. For an occupied space, we discuss the schedule and access to the rooms before arranging the work.

Our commercial sheet presents a 10-10-0 year warranty, meaning ten years for the compressor, ten years for parts, and no labour included in this indication. However, the brochure distinguishes the standard 7-year compressor / 5-year parts warranty from the 10-10 extension, which is linked to registration for eligible residential applications. It also presents labour coverage requiring the purchase of additional coverage. We therefore confirm the applicable written terms, particularly for commercial use.

Do not assume unconfirmed LogisVert assistance

Our product sheet identifies this combination as not ENERGY STAR® certified. Information published by Hydro-Québec specifies that heat pumps installed on or after November 26, 2025 must have this certification to qualify for financial assistance under LogisVert. We therefore do not present this subsidy as guaranteed for the model described.

When financial assistance is a priority, we recommend comparing the project's total cost with that of a combination whose eligibility has been confirmed. This comparison must include building modifications and warranties, not just the advertised amount for the unit.

Entrust your ducted system project to AirGreen

At AirGreen, we offer a free on-site estimate, installation services, and after-sales support throughout Greater Montréal. For this YORK system, we will assist you in assessing the capacity, ductwork, ceiling integration, and work required.

For your ducted air conditioner in Montréal, Laval, Longueuil, on the North Shore or South Shore, contact us at 514-316-2973 or at sales@airgreen.ca. Tell us which rooms need to be served and your comfort priorities: we will prepare a detailed quote, including the proposed references, inclusions, and warranty terms.