{"product_id":"thermopompe-4-zones-conforto-mhmz-36000-btu-r410a","title":"4-Zone Heat Pump CONFORTO MHMZ | 36,000 BTU - R410A","description":"\u003ch2\u003eTwo offices, a living room and a bedroom: four zones for a home where people also work\u003c\/h2\u003e\n\u003cp\u003eNow that work often happens at home, rooms are no longer used the way they were. Two offices are full from nine to five, the living room fills up in the evening and the bedroom is only used at night. Heating the whole house to the same temperature all day no longer makes sense. The \u003cstrong\u003e4-Zone Heat Pump CONFORTO MHMZ | 36,000 BTU - R410A\u003c\/strong\u003e gives each of these four rooms its own \u003cstrong\u003ewall head\u003c\/strong\u003e and set point, all connected to a single \u003cstrong\u003eMHMZ436DACFC condenser\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis \u003cstrong\u003e3-ton\u003c\/strong\u003e condenser serves \u003cstrong\u003e4 zones\u003c\/strong\u003e here, which is its maximum of 4. The wall heads intended for it are the \u003cstrong\u003eMHWAL09DACFC\u003c\/strong\u003e, the \u003cstrong\u003eMHWAL12DACFC\u003c\/strong\u003e and the \u003cstrong\u003eMHWAL18DACFC\u003c\/strong\u003e. Its certified ratings are \u003cstrong\u003e22.2 SEER2\u003c\/strong\u003e, \u003cstrong\u003e13.6 EER2\u003c\/strong\u003e and \u003cstrong\u003e10.3 HSPF2\u003c\/strong\u003e. The system is \u003cstrong\u003eENERGY STAR\u003c\/strong\u003e certified with the \u003cstrong\u003ecold-climate designation\u003c\/strong\u003e under \u003cstrong\u003eENERGY STAR ID 2495072\u003c\/strong\u003e, and it qualifies for a \u003cstrong\u003e$3,960 LogisVert grant\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWorking from home changes how you heat\u003c\/h3\u003e\n\u003cp\u003eWhen two people work in two separate rooms, those two rooms are the ones that need to be comfortable during the day, not the bedroom or the living room. With one head per room, the offices keep their working set point while the rest of the house stays a little cooler. In the evening, demand shifts to the living room; at night, to the bedroom. Each zone only consumes when it is in use.\u003c\/p\u003e\n\u003cp\u003eThis size targets a complete mid-sized home: a two-storey whose upper floor has a bedroom and two small rooms converted into offices, a bungalow with a basement office, or a large condo. The result depends on the insulation; in an older house, the \u003cstrong\u003eelectric baseboards\u003c\/strong\u003e stay in place for deep cold.\u003c\/p\u003e\n\u003ch3\u003eFour heads, four uses\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eMHWAL18DACFC\u003c\/strong\u003e, the largest of the three intended heads, goes in the living room. The \u003cstrong\u003eMHWAL12DACFC\u003c\/strong\u003e suits the main bedroom, and the \u003cstrong\u003eMHWAL09DACFC\u003c\/strong\u003e the offices, which are generally small rooms. The load calculation confirms each choice, taking into account each room's exposure and the heat given off by computers and screens.\u003c\/p\u003e\n\u003cp\u003eThe four heads share the condenser's capacity. During the day, the two offices take most of it; in the evening, the living room. With 4 zones out of a maximum of 4, every connection is used.\u003c\/p\u003e\n\u003ch3\u003eThe sun-exposed office, a case to plan for\u003c\/h3\u003e\n\u003cp\u003eOne rule applies to every multi-zone system of this type: the heads on the same condenser work in the same mode, all heating or all cooling. In most homes, this goes unnoticed. A south-facing office, with computer equipment on all day, can however get too warm on a sunny April afternoon while the rest of the house still asks for heat.\u003c\/p\u003e\n\u003cp\u003eWe take this into account from the visit onward: the choice and placement of the office head, blinds or curtains to cut direct sun, a lower set point for the office in heating mode. On these shoulder-season days, a slightly lower office set point almost always settles the matter. We prefer to explain it before the installation rather than let you find out in April.\u003c\/p\u003e\n\u003ch3\u003eWinter according to the certificate\u003c\/h3\u003e\n\u003cp\u003eThe certificate lists \u003cstrong\u003e33,000 BTU\/h at -8 °C\u003c\/strong\u003e (17 °F), with a \u003cstrong\u003eCOP of 2.40\u003c\/strong\u003e, and \u003cstrong\u003e36,000 BTU\/h at -15 °C\u003c\/strong\u003e (5 °F), with a \u003cstrong\u003eCOP of 1.90\u003c\/strong\u003e. The maximum published capacity is \u003cstrong\u003e36,000 BTU\/h at -15 °C\u003c\/strong\u003e. The two points are measured separately; we report each one as published.\u003c\/p\u003e\n\u003cp\u003eAt -15 °C, the four heads therefore share 100% of the condenser's nominal size. A COP of 1.90 means that at that temperature, each kilowatt-hour consumed returns 1.90 kilowatt-hours of heat, where an electric baseboard returns one. ENERGY STAR's \u003cstrong\u003ecold-climate designation\u003c\/strong\u003e confirms that the combination meets the low-temperature performance criteria.\u003c\/p\u003e\n\u003cp\u003eThese figures come from certificate \u003cstrong\u003eAHRI 210605816\u003c\/strong\u003e, published by NEEP.\u003c\/p\u003e\n\u003ch3\u003eBackup heat and defrost\u003c\/h3\u003e\n\u003cp\u003eThe certificate does not publish a point colder than -15 °C. We therefore recommend keeping the existing baseboards, set slightly below the heads' set point; they stay off for most of the winter. In cold, humid weather, the condenser also runs \u003cstrong\u003edefrost cycles\u003c\/strong\u003e of a few minutes, during which the heads stop blowing warm air and a cloud of vapour rises from the outdoor unit. This is normal, and the baseboards fill in these short pauses.\u003c\/p\u003e\n\u003ch3\u003eThe inverter compressor and small demands\u003c\/h3\u003e\n\u003cp\u003eA home where people work creates many small demands: a single office occupied on a Friday, a bedroom warming up before bedtime. The \u003cstrong\u003einverter compressor\u003c\/strong\u003e adapts by running slowly and metering just enough \u003cstrong\u003eR-410A refrigerant\u003c\/strong\u003e for the head that is calling. It speeds up when several zones ask at once, without the repeated starts that would wear out the unit.\u003c\/p\u003e\n\u003ch3\u003eSummer: cool offices during working hours\u003c\/h3\u003e\n\u003cp\u003eIn cooling, the system is built around a nominal size of \u003cstrong\u003e36,000 BTU\/h\u003c\/strong\u003e for the four zones. The offices, warmed by the sun and the equipment, are cooled during the day, the bedroom only for the night. Extended low-speed operation removes moisture from the air, which makes a working day more comfortable without cold air blowing on the desk. Each head also offers a dehumidification mode.\u003c\/p\u003e\n\u003ch3\u003eThe ratings, in plain terms\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eHSPF2\u003c\/strong\u003e of 10.3 measures heating efficiency over the whole cold season; in Quebec, it is the rating that weighs most on the bill. The \u003cstrong\u003eSEER2\u003c\/strong\u003e of 22.2 measures cooling efficiency over a whole summer, and the \u003cstrong\u003eEER2\u003c\/strong\u003e of 13.6 measures cooling at full load, during a heat wave. The \u003cstrong\u003eCOP\u003c\/strong\u003e expresses efficiency at a specific temperature: 2.40 at -8 °C and 1.90 at -15 °C.\u003c\/p\u003e\n\u003ch3\u003eThe $3,960 LogisVert grant\u003c\/h3\u003e\n\u003cp\u003eThe system is listed in Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e program, with \u003cstrong\u003e$3,960\u003c\/strong\u003e for the owner of an existing home, according to the list in effect on the installation date. We confirm eligibility before signing and prepare the detailed invoice, model numbers and proof of payment. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003eefficient heat pump grant\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\n\u003ch2\u003eInstallation and maintenance\u003c\/h2\u003e\n\u003ch3\u003eOur installation\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\u003cstrong\u003eVisit and load calculation\u003c\/strong\u003e: each room is measured, and its exposure and use are noted.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eHead placement\u003c\/strong\u003e: in an office, the head blows across the room without aiming directly at the workstation.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCondenser\u003c\/strong\u003e: above the snow line, on a wall bracket or a stand, sheltered from snow sliding off the roof.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eRefrigerant lines\u003c\/strong\u003e: one set per head, grouped in a line cover on the facade or run indoors when possible.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDrains\u003c\/strong\u003e: one sloped condensate drain per head.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eElectrical\u003c\/strong\u003e: a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e for the condenser, checked at the panel.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCommissioning\u003c\/strong\u003e: vacuum, leak test, check of each zone and setup of the four remotes with you.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eMaintenance\u003c\/h3\u003e\n\u003cp\u003eRinse the filters of all four heads every two weeks in season, preferably on the same day. Keep the condenser clear of snow and leaves, without covering it in winter. One \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance visit per year cleans the coils, fans and drains and checks the electrical connections. Our \u003ca href=\"\/en\/pages\/services-de-nettoyage-climatiseurs-et-thermopompes-murales-grand-montreal\"\u003ecleaning service\u003c\/a\u003e takes over when you prefer to hand off the annual visit.\u003c\/p\u003e\n\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\n\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the 4-Zone Heat Pump CONFORTO MHMZ | 36,000 BTU - R410A. We assess your four rooms and how they are used, and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Conforto","offers":[{"title":"Default Title","offer_id":67797773418788,"sku":"MHMZ436DACFC","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_MULTIZONE_CONFORTO_MAXIMUM_MHMZ_R410A_4_ZONES_3_TONNES_36000_BTU_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082571","url":"https:\/\/airgreen.ca\/en\/products\/thermopompe-4-zones-conforto-mhmz-36000-btu-r410a","provider":"AirGreen Climatisation \u0026 Chauffage \/ Air Conditioning \u0026 Heating","version":"1.0","type":"link"}