YORK R Series 20 SEER Ducted Air Conditioner | 18000 BTU

Discreet grilles and air distribution suited to your interior

During a renovation, we can integrate cooling in a way other than adding a unit to a wall. The YORK R Series ducted air conditioner in the 18,000 BTU category allows the indoor unit to be concealed above a suspended ceiling or in a suitable mechanical space. Air is then distributed through ducts to wall or ceiling grilles, whose placement can be adapted to the layout. This configuration is expressly presented in the YORK catalog.

At AirGreen, we approach this type of project by considering the unit and its ductwork as a whole. We start by determining which rooms need to be served, the available pathways, and your comfort expectations. Our service covers Montreal, Laval, Longueuil, the North Shore, and the South Shore, both for installation and post-installation support.

Two details help properly identify this product: “R Series 20 SEER” is a series designation, while this combination is documented at 16 SEER. Similarly, the name 18,000 BTU refers to its commercial category; the ducted-unit table indicates a rated cooling capacity of 17,100 BTU/h. We use these detailed figures to compare the equipment.

A ducted system that also provides heating

The system shown combines the DHR18NDB21S indoor unit with the DHR18CSB21S outdoor unit. Despite the term “air conditioner” in its commercial name, it is indeed a ducted heat pump, with both cooling and heating functions. The catalog distinguishes this ducted unit from the ceiling cassettes and floor-ceiling units in the same series.

We use the following specifications from the table on printed page 19 of the catalog, dedicated to ducted units:

These values come from the table specific to the ducted unit, rather than from that of another indoor unit using the same outdoor unit. Our commercial sheet also identifies the assembly by reference AHRI 8578421.

Variable capacity, with no shortcut on sizing

The R Series uses an inverter-driven variable-speed compressor. The manufacturer describes modulation intended to adjust output and reduce the fluctuations associated with the starts and stops of conventional systems.

However, we do not translate this technology into a universal floor area to be covered. Heat pump sizing must take the climate, heating and cooling needs, and building characteristics into account.

For your project, we therefore ask for concrete information: room dimensions, window exposure, known insulation, ceiling height, and occupancy patterns. We also seek to understand the current discomfort. A bedroom that is too hot in the afternoon, an office occupied all day, and a family room used in the evening do not necessarily lead to the same distribution choices.

Our objective is to justify selecting this 18,000 BTU category, then determine how the air will be distributed throughout the selected spaces.

Multiple grilles do not constitute multiple independent zones

The YORK combination presented belongs to single-zone systems, with an outdoor unit paired with an indoor unit. We therefore do not present each grille as a zone that automatically has its own setpoint temperature.

As an illustrative scenario, consider a floor comprising two bedrooms and an office. We can study a ducted distribution system serving these rooms, but we must also examine their respective needs and how they function when the doors are closed.

The return air deserves particular attention here. A conditioned room must have a path that allows air to return to the unit. The technical guides from Pacific Northwest National Laboratory emphasize that insufficient return air can create pressure imbalances and temperature differences between rooms.

Adding a supply grille without providing a return-air path is therefore not a complete design. We incorporate both paths into our proposal instead of limiting ourselves to the number of visible outlets.

Static pressure: a decisive factor for the ductwork

Static pressure is one of the data points to verify in determining whether the fan can move air through the planned ductwork. Excessive restrictions can reduce airflow and compromise comfort; the pressure measurement must be compared with the equipment specifications.

The supplied catalogue specifies a range of 0 to 0.4 in. water column for the DHR18NDB21S, under the heading “static pressure.” We do not assign it the 0.8 in. value indicated for the higher capacities.

Documentary validation is still required before the final ductwork calculation: a supplementary submittal sheet bearing the same references indicates, for its part, 0 to 0.15 in. water column of external static pressure. These indications should not be considered interchangeable without confirmation of their scope and the applicable conditions.

We therefore have the data to be used and the relationship between pressure and airflow confirmed before approving the layout. This precaution is particularly important when a homeowner wishes to retain existing ducts or serve distant rooms.

Four published airflow rates and acoustic comfort to be assessed in the room

The YORK table presents four airflow rates, from highest to lowest: 588, 529, 412 and 382 CFM, meaning cubic feet of air per minute. The corresponding indoor sound pressure levels are 40, 39, 36 and 28 dB(A). The minimum level of 28 dB(A) therefore does not represent all operating speeds.

Outdoors, the DHR18CSB21S is listed at 56 dB(A) in the catalogue.

We discuss acoustic comfort in relation to the location of the grilles and the unit. The return-air path also matters: a return directly connected to the fan can transmit its noise into the occupied space. For a bedroom, we therefore wish to examine the duct network before promising a result based on a single brochure value.

Heating down to −18 °C, within the documented limits

The outdoor unit has an advertised operating range of −18 to 24 °C in heating mode. This lower limit does not mean that the heat pump retains its nominal capacity at −18 °C.

The ducted system table lists 18,800 BTU/h nominal heating capacity, with test conditions including an outdoor temperature of approximately 8 °C. We distinguish this measurement from performance in extreme cold.

Our commercial data sheet also indicates that this combination is certified neither as ENERGY STAR nor as ENERGY STAR for Cold Climates. We therefore define the role of the existing heating system during the project assessment. The brochure does not provide a detailed capacity or coefficient of performance table at −15 °C that would allow us to claim that this system alone will cover the building's winter heating needs.

A wired controller included and a WiFi option to be clarified

The page dedicated to the ducted system presents the standard DWCR wired controller. We are retaining this product-specific information rather than automatically attributing to it the infrared remote shown with other units in the R Series.

For more advanced programming needs, the catalog also describes the DWCR2, with seven-day programming and eight events per day, as well as lockout functions. Its selection must be specified in the quotation.

WiFi is listed as an option on our commercial data sheet. However, the brochure does not confirm a WiFi module specific to this combination; its presentation of the EWPE app refers to the P, X, and Z series. We therefore request confirmation of compatibility before including an interface or promising remote functions.

A ducted installation that accounts for the ducts, access, and maintenance

Allow for more than the cabinet footprint

The indoor unit measures 41 × 28 × 11 in, in the order width × depth × height, according to the catalog. Its net weight is listed as 73 lb, or approximately 33 kg.

We use these dimensions for a preliminary integration study, not as sufficient clearance on their own. Our preparation must also account for the connections, duct transitions, and access to components requiring maintenance.

For the outdoor unit, the published dimensions are 38 × 28 × 16 in. We have the dimension orientation, supports, and clearances confirmed against the applicable plan before finalizing its location.

For a renovation in Montreal or Longueuil, we ideally request photos of the open ceiling and the proposed passage routes. We can then discuss the actual constraints before the finishes limit the possibilities.

Two separate electrical power supplies

The manufacturer specifies that the indoor and outdoor units require separate power supplies. The system operates at 208/230 V, single-phase, 60 Hz, clarifying the “220 V” designation in our commercial sheet.

The indoor values appear in the table specific to the ducted unit.

We have the necessary circuits specified in the quote. The responsible professional must validate the conductors and protection according to the nameplates and applicable requirements. We do not reduce this installation to a single 25 A outdoor connection.

Distinguish refrigerant piping from air ducts

The system uses R-410A, with a 1/4 in liquid line and a 1/2 in gas line. The catalog specifies a maximum total piping length of 164 ft, or 50 m, as well as a maximum elevation difference of 49.2 ft, or 15 m.

These limits concern the refrigerant connections between the units. They do not constitute authorization to install a 50-meter air distribution network. Air ducts must be studied separately, according to their route, dimensions, and available pressure.

We also distinguish between a technical limit and a length included in the price. Additional passages, difficult access, and concealed connections must be described in the quote.

Arrange condensate drainage

The internal condensate pump is one of the advertised features of the ducted unit. The indoor drain connection is specified as having a 1 in. outside diameter.

We plan the drain route before closing the ceiling. In this presentation, the brochure does not specify the pump's permissible lift height; we confirm this limit in the applicable instructions.

We also want the owner to know where the service access and drainage components are located. A concealed unit must remain accessible for inspection, without relying on an improvised opening in a new finish.

Two AirGreen projects that illustrate our approach

In Îles-Laval: integrate a ducted unit into an existing cavity

During a project in Îles-Laval, we installed a GREE All Match Slim Duct R32 in a ceiling that was already open. The wood structure, insulation, and available space required us to work simultaneously on the unit's orientation, the connections, and future access. Our report also describes the attention given to the return air, transitions, and duct sealing.

The documented result is a heating and cooling system integrated into the structure, with limited visual presence in the living space. This project involved GREE equipment, not this YORK unit; we draw on it as an integration experience, not as a performance measurement for the R Series.

For your project, we apply the same planning question: how can the entire system be installed cleanly while preserving the access needed after the finishes are completed?

In Longueuil: address the ductwork at the same time as the equipment

In a mixed-use building in Longueuil, our ventilation system modernization project included adapting and balancing the ductwork. The initial diagnosis identified, among other things, unbalanced airflow, noise, and leaks. The report states that the managers appreciated the cleanliness of the work and the transparency of the follow-up.

This was a different commercial installation from the YORK ducted unit presented here. The lesson remains relevant: we must examine the ductwork when a comfort issue accompanies a replacement, rather than automatically attributing every difficulty to the old equipment.

Commissioning that also verifies the distribution

For a ducted system, we recommend clearly including the following checks in the scope of work:

1. Refrigeration circuit tightness and preparation, with pressure testing and evacuation according to the applicable procedures.
2. Verification of the charge and controls, based on the actual installation.
3. Airflow and static pressure measurement, with an examination of the distribution and any possible network leaks.
4. Drainage testing and an operating overview, before the documents are handed over to the owner.

Checks of the refrigeration circuit, static pressure, airflow, and duct leaks are among the commissioning practices described by the Pacific Northwest National Laboratory.

We want the completion of the work to provide more than an appliance that starts up: the settings and observations should make it possible to understand how the system operates.

Maintenance made easier by the choices made at the outset

We plan access to the filtration system from the design stage. Depending on the return-air configuration, a filter placed at an accessible grille can simplify maintenance compared with a filter located near equipment that is difficult to reach. This choice should be studied along with the ductwork.

The brochure provided does not specify a cleaning frequency for the DHR18NDB21S. We therefore provide the instructions corresponding to the filter actually installed and the manufacturer's instructions, without assuming that all filters can be washed.

To prepare for an AirGreen service call, we ask you to note the affected rooms, the selected mode, and any displayed code. A change in noise, weak airflow, or a temperature difference that appeared after a change in furniture should be described precisely.

If there is water on the ceiling, a burning smell, or repeated electrical trips, we recommend turning off the appliance and requesting professional service rather than repeatedly restarting it.

A clear budget, without assuming any guarantee or subsidy

The work must be detailed

We price the project by distinguishing the equipment, ductwork, grilles, return air, filtration, connections, and controls. We also specify the openings, technical access points, possible removal of an old system, and included finishes.

At AirGreen, we provide a free on-site estimate and submit a final offer before work begins. The value of a visit is especially clear for a ducted system: we can examine what will be concealed behind the ceiling as well as what will remain visible in the rooms.

The 10-10-0 package comes with conditions

Our commercial product sheet lists 10 years on the compressor, 10 years on parts, and no labour included in this package. The catalogue distinguishes a standard warranty of 7 years on the compressor and 5 years on parts, followed by extended residential coverage of 10 years on the compressor and parts, with registration.

Coverage including labour is also offered with the purchase and registration of an extended warranty for residential applications. We confirm the conditions applicable to the equipment sold, particularly when the project is commercial.

LogisVert eligibility must be verified before any deduction

Hydro-Québec indicates that heat pumps installed as of November 26, 2025 must be ENERGY STAR certified to be eligible for LogisVert financial assistance.

Since our product sheet presents this combination as uncertified, we do not deduct a LogisVert grant from its budget on that basis. When financial assistance influences the choice, we propose comparing the installed costs with those of a combination whose eligibility has been confirmed.

Prepare your ducted installation with AirGreen

We are evaluating the YORK R Series 18,000 BTU class for its documented capacity, ducted distribution, and integration possibilities in your building. Our proposal must specify the areas concerned, the heating system retained, maintenance access, and the work required.

Prepare a few photos of the area to be served, the ceiling, the electrical panel, and the proposed outdoor location. This information will help us prepare a tailored quote rather than an estimate based solely on the number of BTUs.

Contact AirGreen at 514-316-2973 or at sales@airgreen.ca to have your ducted air conditioner project evaluated in Montréal, Laval, Longueuil, on the North Shore or the South Shore, and receive your quote.