{"product_id":"thermopompe-3-zones-senville-r454b-18000-btu","title":"SENVILLE R454B 3-Zone Heat Pump | 18000 BTU","description":"\u003ch2\u003eA compact multi-zone platform for cooling and heating several rooms with a single outdoor unit\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSENVILLE R454B 18,000 BTU 3-Zone Heat Pump\u003c\/strong\u003e addresses a common problem in homes, condos, and small buildings in Greater Montreal: several rooms need independent temperature control, but the owner does not want to multiply outdoor units on the façade, balcony, or side of the building.\u003c\/p\u003e\n\u003cp\u003eWith outdoor unit \u003cstrong\u003eSENA-18HF-MOA\u003c\/strong\u003e, Senville offers a multi-zone platform that can support \u003cstrong\u003etwo to three zones\u003c\/strong\u003e, depending on the configuration selected. The attached technical documentation precisely confirms this “2-3 zone” connection capacity, a single-phase 208\/230 V power supply, and ductless heat pump technology. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eAt AirGreen, this type of system is particularly relevant for certain projects in \u003cstrong\u003eMontreal, Laval, Longueuil, the South Shore, and the North Shore\u003c\/strong\u003e, where the rooms are sufficiently separated that a single wall-mounted unit cannot distribute air properly. A second-floor bedroom, an enclosed office, and a living area on the ground floor may have very different needs at the same time.\u003c\/p\u003e\n\u003cp\u003eRather than trying to circulate cold or warm air through multiple hallways and doors, a multi-zone configuration places an indoor unit directly in the areas that need it.\u003c\/p\u003e\n\u003cp\u003eThe combination presented by AirGreen uses:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eOutdoor unit: SENA-18HF-MOA\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAHRI: 215735311\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eClass capacity: 18,000 BTU\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSEER2: 25.0\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eEER2: 15.0\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eHSPF2 Region 4: 10.4\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eR-454B\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eENERGY STAR: yes\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCold Climate: yes\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eheating advertised down to \u003cstrong\u003e-30 °C\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eWiFi included\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e220 V\u003c\/strong\u003e power supply\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eMCA: approximately 18 A\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eMOP: 20 A\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe brochure also confirms an SEER2 of \u003cstrong\u003e25\u003c\/strong\u003e, an EER2 of \u003cstrong\u003e15\u003c\/strong\u003e and an HSPF2-4 of \u003cstrong\u003e10,4\u003c\/strong\u003e. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eOne essential clarification: the brochure illustrates two zones, but the outdoor unit supports up to three zones\u003c\/h3\u003e\n\u003cp\u003eThe attached documentation presents a commercial configuration on the first page, \u003cstrong\u003eDual Zone SENA-18HF\/D\u003c\/strong\u003e, with two 9,000 BTU indoor units. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePage 4 is nevertheless more important for understanding the outdoor unit itself: model \u003cstrong\u003eSENA-18HF-MOA\u003c\/strong\u003e is listed as compatible with \u003cstrong\u003e2 to 3 zones\u003c\/strong\u003e. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis means that the brochure shows a particular combination, but the outdoor unit can be used in a three-zone configuration when the selected indoor units are compatible.\u003c\/p\u003e\n\u003cp\u003eFor an AirGreen installation, we therefore always verify the exact combination before ordering:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003emodels of the three indoor units;\u003c\/li\u003e\n\u003cli\u003erated capacities of each;\u003c\/li\u003e\n\u003cli\u003ecompatibility with the SENA-18HF-MOA;\u003c\/li\u003e\n\u003cli\u003emanufacturer’s combination limitations;\u003c\/li\u003e\n\u003cli\u003etotal capacity actually available;\u003c\/li\u003e\n\u003cli\u003eAHRI number applicable to the selected configuration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis is particularly important in a multi-zone system, because three indoor units do not mean that each one can produce its maximum rated capacity simultaneously without limitation.\u003c\/p\u003e\n\u003ch3\u003eWhy 18,000 BTUs can serve three zones\u003c\/h3\u003e\n\u003cp\u003eA multi-zone system should be understood as \u003cstrong\u003eshared outdoor capacity\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe brochure lists the following for the SENA-18HF-MOA:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003erated cooling capacity: \u003cstrong\u003e19,000 BTU\/h\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003ecooling range: \u003cstrong\u003e5,400 to 28,000 BTU\/h\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003erated heating capacity: \u003cstrong\u003e20,000 BTU\/h\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003eheating range: \u003cstrong\u003e5,700 to 27,000 BTU\/h\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThis modulation explains why an 18,000-BTU-class outdoor unit can supply several small zones.\u003c\/p\u003e\n\u003cp\u003eLet’s take a residential configuration as an example: three bedrooms or small spaces do not necessarily require their full capacity at the same time. A bedroom exposed to the sun may require substantial cooling in the late afternoon, while another north-facing zone requires very little.\u003c\/p\u003e\n\u003cp\u003eThe inverter compressor then distributes the available capacity according to the system’s demands.\u003c\/p\u003e\n\u003cp\u003eThe right question is therefore not simply “how many BTUs do the indoor heads provide in total?” We must also consider \u003cstrong\u003ehow the zones will actually be used\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhen three zones make more sense than a single large head\u003c\/h3\u003e\n\u003cp\u003eIn our \u003cstrong\u003emulti-zone heat pump projects in Montreal and Greater Montreal\u003c\/strong\u003e, we often encounter buildings where the total area does not seem particularly large, but where the layout makes a single head ineffective.\u003c\/p\u003e\n\u003cp\u003eA typical example is a floor comprising:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003etwo closed bedrooms;\u003c\/li\u003e\n\u003cli\u003ea small office;\u003c\/li\u003e\n\u003cli\u003ea central hallway.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eInstalling a single high-capacity heat pump in the hallway does not guarantee comfort in all three rooms. As soon as the doors are closed, air circulation becomes limited.\u003c\/p\u003e\n\u003cp\u003eIn this type of configuration, three small indoor units connected to a single outdoor unit can provide much more precise control.\u003c\/p\u003e\n\u003ch3\u003eOne important advantage: each zone can have its own setpoint\u003c\/h3\u003e\n\u003cp\u003eThe main benefit of a \u003cstrong\u003e3-zone heat pump\u003c\/strong\u003e is not simply having three air handlers.\u003c\/p\u003e\n\u003cp\u003eIt is the ability to adapt comfort to each room.\u003c\/p\u003e\n\u003cp\u003eA bedroom can be set to a different temperature than the office. An unoccupied room can operate at a more economical setpoint. The area used in the evening can receive more heating or cooling.\u003c\/p\u003e\n\u003cp\u003eThis avoids treating the entire house as a single thermal zone when the needs differ.\u003c\/p\u003e\n\u003cp\u003eHowever, an important characteristic of multizone systems must be respected: indoor units connected to the same outdoor unit generally have to operate in a compatible mode. With a conventional residential multizone system, one should not expect to heat one room while another simultaneously requests cooling.\u003c\/p\u003e\n\u003ch3\u003eSEER2 of 25: high seasonal efficiency\u003c\/h3\u003e\n\u003cp\u003eThe brochure gives the SENA-18HF-MOA a \u003cstrong\u003eSEER2 of 25\u003c\/strong\u003e and an \u003cstrong\u003eEER2 of 15\u003c\/strong\u003e. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThese values are particularly interesting in a multizone system, where the compressor must constantly adjust its speed to meet the needs of several spaces.\u003c\/p\u003e\n\u003cp\u003eSenville also presents this product as ENERGY STAR certified and advertises up to 50% energy savings under certain comparison conditions. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eAt AirGreen, we prefer never to turn this type of percentage into a promise about the electricity bill. Actual consumption depends greatly on:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ethe previous system;\u003c\/li\u003e\n\u003cli\u003einsulation;\u003c\/li\u003e\n\u003cli\u003ethe requested temperatures;\u003c\/li\u003e\n\u003cli\u003eschedules;\u003c\/li\u003e\n\u003cli\u003ethe number of active zones;\u003c\/li\u003e\n\u003cli\u003eoutdoor temperatures;\u003c\/li\u003e\n\u003cli\u003ethe use of supplemental electric heating.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCertified ratings such as \u003cstrong\u003eSEER2, EER2, and HSPF2\u003c\/strong\u003e remain the best tools for objectively comparing several systems.\u003c\/p\u003e\n\u003ch3\u003eHSPF2 of 10.4 and operation down to -30 °C\u003c\/h3\u003e\n\u003cp\u003eThe SENA-18HF-MOA is presented as a \u003cstrong\u003ecold-climate heat pump\u003c\/strong\u003e, with heating operation advertised down to \u003cstrong\u003e-30 °C\u003c\/strong\u003e. The brochure confirms this minimum outdoor temperature limit. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eAirGreen’s data indicate approximately:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e20,000 BTU\/h at -8 °C\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e19,000 BTU\/h at -15 °C\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003eup to \u003cstrong\u003e10,000 BTU\/h at -30 °C\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe COP listed in the specifications is approximately:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2.53 at -8 °C\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003eapproximately \u003cstrong\u003e1.3 at -30 °C\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis shows why it is necessary to analyze more than just the “-30 °C” mention.\u003c\/p\u003e\n\u003cp\u003eAt -30 °C, the unit can still produce heat, but its available capacity is significantly lower than at milder temperatures.\u003c\/p\u003e\n\u003cp\u003eFor a homeowner in \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, \u003cstrong\u003eMontréal\u003c\/strong\u003e, or the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e, this means that supplemental heating may still be necessary during periods of extreme cold, depending on the building’s heat loss.\u003c\/p\u003e\n\u003ch3\u003eMultizone heating adds another dimension to the calculation\u003c\/h3\u003e\n\u003cp\u003eWith a single-zone system, we mainly compare the unit’s capacity with the heating load of a space.\u003c\/p\u003e\n\u003cp\u003eIn a three-zone system, simultaneous demand must also be considered.\u003c\/p\u003e\n\u003cp\u003eSuppose three rooms that each require several thousand BTUs on a very cold day. The sum of their needs may exceed the capacity the outdoor unit can provide at that specific moment.\u003c\/p\u003e\n\u003cp\u003eThat is why a serious multi-zone selection does not simply consist of adding three indoor units until reaching a number that seems acceptable.\u003c\/p\u003e\n\u003cp\u003eAt AirGreen, we instead examine:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003ethe needs of each zone;\u003c\/li\u003e\n\u003cli\u003esimultaneous demand;\u003c\/li\u003e\n\u003cli\u003ethe outdoor unit's low-temperature capacity;\u003c\/li\u003e\n\u003cli\u003ehow occupants use each room;\u003c\/li\u003e\n\u003cli\u003ethe presence of supplemental heating.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWiFi included: particularly useful with multiple zones\u003c\/h3\u003e\n\u003cp\u003eSenville indicates smart app control and Alexa integration. The system allows users to create schedules and change settings remotely. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIn a three-zone system, this feature is more useful than on a simple single-zone system.\u003c\/p\u003e\n\u003cp\u003eFor example, a homeowner can:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003elower a bedroom's temperature during the day;\u003c\/li\u003e\n\u003cli\u003ekeep an office at a different setpoint;\u003c\/li\u003e\n\u003cli\u003eschedule the main living area according to occupancy hours;\u003c\/li\u003e\n\u003cli\u003eadjust a zone without going to the remote control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe brochure also mentions a \u003cstrong\u003eUSB WiFi kit\u003c\/strong\u003e in the configuration shown. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eSelf-diagnostic and leak detection\u003c\/h3\u003e\n\u003cp\u003eThe documentation mentions an integrated \u003cstrong\u003eself-diagnostic and leak detection\u003c\/strong\u003e system. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eOn a multi-zone system, this feature is useful because the circuit is more complex than with a single-zone system.\u003c\/p\u003e\n\u003cp\u003eIt includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003emultiple refrigerant lines;\u003c\/li\u003e\n\u003cli\u003emultiple indoor units;\u003c\/li\u003e\n\u003cli\u003emore connections;\u003c\/li\u003e\n\u003cli\u003emultiple condensate drains;\u003c\/li\u003e\n\u003cli\u003emultiple electronic controls.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA diagnostic code can help guide service, but it does not replace a refrigeration technician's measurements when capacity becomes insufficient or one zone behaves differently from the others.\u003c\/p\u003e\n\u003ch2\u003eWhy installing a three-zone system requires much more planning than a simple mini-split\u003c\/h2\u003e\n\u003ch3\u003eR-454B and precharge up to 75 feet according to the brochure\u003c\/h3\u003e\n\u003cp\u003eThe documentation indicates a charge of \u003cstrong\u003e78.31 oz of R-454B\u003c\/strong\u003e and a total precharge for up to \u003cstrong\u003e75 feet\u003c\/strong\u003e for the outdoor unit. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eFor a multi-zone system, the total line length quickly becomes substantial.\u003c\/p\u003e\n\u003cp\u003eThree indoor units can be installed on three different walls, or even on different floors. We therefore need to plan:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ethe length of each circuit;\u003c\/li\u003e\n\u003cli\u003etotal length;\u003c\/li\u003e\n\u003cli\u003eheight differences;\u003c\/li\u003e\n\u003cli\u003edrain routing;\u003c\/li\u003e\n\u003cli\u003ecable routing;\u003c\/li\u003e\n\u003cli\u003eoutdoor line sets;\u003c\/li\u003e\n\u003cli\u003eaccess for servicing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe fact that the system is precharged does not mean that every installation can automatically be completed without adjustment. The final charge must correspond to the actual lengths and the manufacturer's requirements.\u003c\/p\u003e\n\u003ch3\u003e1\/4 in – 3\/8 in piping\u003c\/h3\u003e\n\u003cp\u003eThe AirGreen listing indicates 1\/4 in – 3\/8 in piping.\u003c\/p\u003e\n\u003cp\u003eThese relatively compact dimensions make it easier to route the lines than with large central systems.\u003c\/p\u003e\n\u003cp\u003eBut in a three-zone installation, aesthetics must be considered.\u003c\/p\u003e\n\u003cp\u003eThree pairs of lines running up a façade can become much more visible than a single-zone installation. At AirGreen, we therefore try to group and organize the runs to limit the visual impact.\u003c\/p\u003e\n\u003cp\u003eOn the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, in Laval, or in Montreal's residential neighborhoods, this detail often makes a major difference in the perceived quality of the installation.\u003c\/p\u003e\n\u003ch3\u003e137 lb outdoor unit: the location must be properly prepared\u003c\/h3\u003e\n\u003cp\u003eThe brochure gives the outdoor unit's approximate dimensions as:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e37.24 × 16.14 × 31.89 in\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eand weighs approximately \u003cstrong\u003e137.35 lb\u003c\/strong\u003e. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe outdoor airflow can reach approximately \u003cstrong\u003e2,130.7 CFM\u003c\/strong\u003e, while the stated sound level is \u003cstrong\u003e61.5 dB(A)\u003c\/strong\u003e. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eWe must therefore select a location that takes into account:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003esnow accumulation;\u003c\/li\u003e\n\u003cli\u003edrainage during defrost;\u003c\/li\u003e\n\u003cli\u003enoise;\u003c\/li\u003e\n\u003cli\u003eclearances;\u003c\/li\u003e\n\u003cli\u003eneighboring properties;\u003c\/li\u003e\n\u003cli\u003ethe length of the three refrigerant line runs;\u003c\/li\u003e\n\u003cli\u003efuture access to the compressor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAn outdoor location that seems convenient for the first indoor unit may make the other two runs unnecessarily long. That is why the overall routing must be planned before the first hole is drilled.\u003c\/p\u003e\n\u003ch3\u003eMCA 17.5 A and maximum protection 20 A\u003c\/h3\u003e\n\u003cp\u003eThe brochure states:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eMCA: 17.5 A\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003emaximum fuse: 20 A\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e208\/230 V, single-phase, 60 Hz\u003c\/strong\u003e power supply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe AirGreen data sheet rounds the MCA up to \u003cstrong\u003e18 A\u003c\/strong\u003e and also indicates an MOP of \u003cstrong\u003e20 A\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eFor a system capable of supplying up to three zones, this electrical demand remains relatively modest.\u003c\/p\u003e\n\u003cp\u003eNevertheless, the circuit must be sized according to the nameplate data and the requirements applicable to the job site.\u003c\/p\u003e\n\u003ch3\u003eThree drains, three potential problems if the route is poorly designed\u003c\/h3\u003e\n\u003cp\u003eWith three indoor units, up to three condensate drains must also be managed.\u003c\/p\u003e\n\u003cp\u003eOn site, this is just as important as the refrigerant piping.\u003c\/p\u003e\n\u003cp\u003eWhenever possible, we aim for gravity drainage with a continuous slope.\u003c\/p\u003e\n\u003cp\u003ePoor planning can lead to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eunnecessary condensate pumps;\u003c\/li\u003e\n\u003cli\u003enoise;\u003c\/li\u003e\n\u003cli\u003ebackflow;\u003c\/li\u003e\n\u003cli\u003eleaks;\u003c\/li\u003e\n\u003cli\u003eadditional maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIn a bedroom, a small condensate pump that starts regularly can become much more disruptive than anticipated when the quote was prepared.\u003c\/p\u003e\n\u003ch3\u003eAutomatic louver control\u003c\/h3\u003e\n\u003cp\u003eThe AirGreen data sheet indicates automatic louver control:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evertical: automatic\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ehorizontal: automatic\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis function facilitates air distribution in each room.\u003c\/p\u003e\n\u003cp\u003eHowever, it does not replace the proper placement of the indoor unit.\u003c\/p\u003e\n\u003cp\u003eIn a bedroom, we avoid having the airflow point directly at the bed whenever possible. In an office, we avoid blowing directly onto the workstation. In a living room, we instead try to use the length of the room to promote better distribution.\u003c\/p\u003e\n\u003ch3\u003eThree small zones should not be treated as one 18,000-BTU zone.\u003c\/h3\u003e\n\u003cp\u003eA common mistake when choosing a multi-zone system is to reason as if it were a single-zone system.\u003c\/p\u003e\n\u003cp\u003eThe homeowner sees “18,000 BTU” and assumes they automatically have 6,000 BTU available at all times in each of the three rooms.\u003c\/p\u003e\n\u003cp\u003eThe reality is more dynamic.\u003c\/p\u003e\n\u003cp\u003eThe compressor shares its capacity according to demand. If only one zone is operating, the system may reduce its output. If all three zones demand significant heating simultaneously, the total capacity is distributed.\u003c\/p\u003e\n\u003cp\u003eThat is why we analyze \u003cstrong\u003esimultaneous loads\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat area can this system heat and cool?\u003c\/h3\u003e\n\u003cp\u003eThe brochure associated with the SENA-18HF\/D mentions an indicative range of approximately \u003cstrong\u003e750 to 1,250 sq. ft.\u003c\/strong\u003e \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis information must be interpreted cautiously in a three-zone configuration.\u003c\/p\u003e\n\u003cp\u003eA very well-insulated 1,000 sq. ft. dwelling does not have the same load as an older 1,000 sq. ft. floor with several windows and exposed walls.\u003c\/p\u003e\n\u003cp\u003eFloor area alone does not determine the right choice.\u003c\/p\u003e\n\u003cp\u003eWe consider:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ewindow orientation;\u003c\/li\u003e\n\u003cli\u003einsulation;\u003c\/li\u003e\n\u003cli\u003enumber of floors;\u003c\/li\u003e\n\u003cli\u003eceiling height;\u003c\/li\u003e\n\u003cli\u003esun exposure;\u003c\/li\u003e\n\u003cli\u003enumber of occupants;\u003c\/li\u003e\n\u003cli\u003ecurrent heating system;\u003c\/li\u003e\n\u003cli\u003eparts distribution.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDisplayed provincial rebate: $2,400\u003c\/h3\u003e\n\u003cp\u003eThe AirGreen product sheet provided with the product indicates a \u003cstrong\u003e$2,400 provincial rebate\u003c\/strong\u003e for this combination.\u003c\/p\u003e\n\u003cp\u003eIt also mentions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eENERGY STAR: yes\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold Climate: yes\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003eENERGY STAR number \u003cstrong\u003e3630058\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe brochure confirms ENERGY STAR certification and positions the system as a cold-climate heat pump. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eHowever, all financial assistance must be confirmed when the quote is prepared, especially for a multi-zone system where eligibility may depend on the exact combination of the outdoor unit and indoor units.\u003c\/p\u003e\n\u003ch3\u003eWarranty: a difference between the AirGreen product sheet and the brochure\u003c\/h3\u003e\n\u003cp\u003eThe AirGreen product sheet states:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e10 years compressor – 10 years parts – 0 years labor.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe attached brochure instead indicates a standard warranty of \u003cstrong\u003e10 years on the compressor and 5 years on parts\u003c\/strong\u003e. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe technical table on page 5 also states \u003cstrong\u003e10 years compressor \/ 5 years parts\u003c\/strong\u003e. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis difference must be confirmed before purchase. Coverage may depend on the retailer’s program, product registration, or applicable commercial terms.\u003c\/p\u003e\n\u003ch3\u003eWhy three zones may be more attractive than three separate systems\u003c\/h3\u003e\n\u003cp\u003eThree single-zone systems would have three outdoor units.\u003c\/p\u003e\n\u003cp\u003eA multi-zone system uses only one.\u003c\/p\u003e\n\u003cp\u003eThis can reduce:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ethe outdoor space occupied;\u003c\/li\u003e\n\u003cli\u003ethe number of supports;\u003c\/li\u003e\n\u003cli\u003ethe visual impact;\u003c\/li\u003e\n\u003cli\u003ethe number of outdoor electrical circuits;\u003c\/li\u003e\n\u003cli\u003ethe space occupied on a balcony or along a house.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIn Montreal, where outdoor space can be very limited, this advantage can sometimes be decisive.\u003c\/p\u003e\n\u003cp\u003eOn the other hand, a multi-zone system shares a single outdoor unit. A major failure of this unit can therefore affect all zones simultaneously.\u003c\/p\u003e\n\u003cp\u003eIt is a compromise to consider when making your choice.\u003c\/p\u003e\n\u003ch3\u003eWhy choose AirGreen for a three-zone heat pump\u003c\/h3\u003e\n\u003cp\u003eA properly executed multi-zone installation requires more preparation than a single-zone system.\u003c\/p\u003e\n\u003cp\u003eAt AirGreen, we analyze:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ethe load of each room;\u003c\/li\u003e\n\u003cli\u003eindoor unit combinations;\u003c\/li\u003e\n\u003cli\u003esimultaneous capacity;\u003c\/li\u003e\n\u003cli\u003elow-temperature performance;\u003c\/li\u003e\n\u003cli\u003erefrigerant line lengths;\u003c\/li\u003e\n\u003cli\u003ethe three drains;\u003c\/li\u003e\n\u003cli\u003eoutdoor routing;\u003c\/li\u003e\n\u003cli\u003eclearances;\u003c\/li\u003e\n\u003cli\u003eelectrical supply;\u003c\/li\u003e\n\u003cli\u003erebates;\u003c\/li\u003e\n\u003cli\u003efuture access for servicing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWe serve \u003cstrong\u003eMontreal, Laval, Longueuil, the South Shore, the North Shore, and Montérégie\u003c\/strong\u003e for the installation, replacement, and maintenance of multi-zone HVAC systems.\u003c\/p\u003e\n\u003ch3\u003eOur assessment of the SENVILLE SENA-18HF-MOA\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eSENVILLE SENA-18HF-MOA\u003c\/strong\u003e platform brings together several features that are particularly relevant for a small multi-zone system:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ecompatibility with \u003cstrong\u003e2 to 3 zones\u003c\/strong\u003e according to the brochure;\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e18,000 BTU\u003c\/strong\u003e capacity class;\u003c\/li\u003e\n\u003cli\u003eannounced technical cooling capacity of up to \u003cstrong\u003e28,000 BTU\/h\u003c\/strong\u003e in modulation;\u003c\/li\u003e\n\u003cli\u003emodulating heating capacity up to \u003cstrong\u003e27,000 BTU\/h\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSEER2 25\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEER2 15\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHSPF2-4 10.4\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003eheating down to \u003cstrong\u003e-30 °C\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eR-454B\u003c\/strong\u003e refrigerant;\u003c\/li\u003e\n\u003cli\u003eENERGY STAR;\u003c\/li\u003e\n\u003cli\u003eCold Climate;\u003c\/li\u003e\n\u003cli\u003eWiFi;\u003c\/li\u003e\n\u003cli\u003emaximum electrical protection of \u003cstrong\u003e20 A\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt is particularly useful when several small rooms need to be controlled while limiting the number of outdoor units.\u003c\/p\u003e\n\u003cp\u003eHowever, the most important point remains selecting the actual combination. The attached brochure shows two 9,000 BTU indoor units, even though the SENA-18HF-MOA technical sheet confirms compatibility with up to three zones. A three-zone configuration must therefore be validated with the exact indoor models before installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTo get a quote for a SENVILLE 3-zone heat pump, contact AirGreen. We can check the capacity of each room, the combination of indoor units, piping lengths, and applicable financial assistance before confirming the equipment for your property in Montreal, Laval, Longueuil, the North Shore, or the South Shore.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Senville","offers":[{"title":"Default Title","offer_id":56120039964964,"sku":null,"price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/00_THERMOPOMPE_3_ZONES_SENVILLE_R454B_18000_BTU_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD_RIVE_NORD.png?v=1789057749","url":"https:\/\/airgreen.ca\/en\/products\/thermopompe-3-zones-senville-r454b-18000-btu","provider":"AirGreen Climatisation \u0026 Chauffage \/ Air Conditioning \u0026 Heating","version":"1.0","type":"link"}