{"product_id":"thermopompe-monobloc-gree-rooftop-r32-de-4-tonnes-montreal-laval-longueuil-rive-sud-et-rive-nord","title":"Packaged Heat Pump System Gree Rooftop R32 4 Ton | Montreal, Laval, Longueuil, South Shore and North Shore","description":"\u003ch2\u003eA 4 ton is planned in three parts: the air, the power and the roof\u003c\/h2\u003e\n\u003cp\u003eThe Gree \u003cstrong\u003eRooftop R32\u003c\/strong\u003e \u003cstrong\u003epackaged heat pump\u003c\/strong\u003e in the \u003cstrong\u003e4 ton\u003c\/strong\u003e size (48,000 BTU\/h nominal capacity, 47,000 BTU\/h certified in cooling) heats and cools stores, offices and buildings whose load goes beyond what the 2 or 3 ton sizes cover. At this capacity, a successful installation rests on three things that are decided well before the work starts: the duct system has to carry the airflow, the electrical panel has to take the circuit, and the roof has to support the unit.\u003c\/p\u003e\n\u003cp\u003eAt AirGreen, we take up these three parts right at the estimate, with you, with your electrician and, if needed, with the professional responsible for the building structure. Everything is gathered in a single outdoor cabinet (compressor, coils and fan); the unit is all electric, \u003cstrong\u003eENERGY STAR Cold Climate certified\u003c\/strong\u003e, and connects to the duct system already in place or still to be built. We install it in Montreal, in Laval, in Longueuil, on the North Shore and on the South Shore.\u003c\/p\u003e\n\u003ch3\u003ePart one: air distribution\u003c\/h3\u003e\n\u003cp\u003eThe fan on the 4 ton moves \u003cstrong\u003e1,350 CFM\u003c\/strong\u003e at high speed, 900 CFM at medium speed and 860 CFM at low speed. That airflow has to be able to travel through the ducts without the resistance becoming excessive, otherwise part of the unit's capacity never reaches the rooms.\u003c\/p\u003e\n\u003ch4\u003eUnderstanding static pressure\u003c\/h4\u003e\n\u003cp\u003eExternal static pressure is the resistance the air meets outside the unit: ducts, elbows, grilles, filters and dampers. Gree publishes a value of 0.50 in. for this model, within an operating range of 0 to 0.8 in. A duct system that is too restrictive cuts the real airflow, leaves rooms lukewarm in winter and areas poorly cooled in summer, and makes the fan work in poor conditions.\u003c\/p\u003e\n\u003ch4\u003eWhat we measure on site\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eThe cross-section of the main ducts and the branches, compared with the airflow of 1,350 CFM.\u003c\/li\u003e\n\u003cli\u003eThe number and the size of the supply and return air grilles.\u003c\/li\u003e\n\u003cli\u003eThe static pressure of the existing duct system, to place it within the range of 0 to 0.8 in.\u003c\/li\u003e\n\u003cli\u003eLeaks and uninsulated sections, above all those that cross an attic or an unheated space.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf the duct system was designed for a smaller unit, we tell you what corrections to plan for, grille by grille or duct by duct, before you make a decision.\u003c\/p\u003e\n\u003ch3\u003ePart two: the electrical circuit\u003c\/h3\u003e\n\u003cp\u003eThe 4 ton is powered in \u003cstrong\u003e208-230 V single-phase\u003c\/strong\u003e, 60 Hz. That is an advantage for buildings with no three-phase service: there is no need to have one installed to take the unit. Two values published by Gree guide your electrician:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMCA of 39.1 A:\u003c\/strong\u003e the minimum circuit ampacity, used to choose the conductor size.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMOP of 45 A:\u003c\/strong\u003e the maximum overcurrent protection, that is the maximum rating of the breaker or the fuses.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBefore installation, we check with your electrician the capacity available at the panel, the room for a new breaker, the cable route up to the roof and the location of the disconnect near the unit. When the panel is already loaded, it is better to know at the estimate than on the day of the work: a service upgrade is planned, it is not improvised.\u003c\/p\u003e\n\u003ch3\u003ePart three: the roof and handling\u003c\/h3\u003e\n\u003cp\u003eThe cabinet on the 4 ton measures \u003cstrong\u003e44 × 44 × 49-1\/4 in.\u003c\/strong\u003e (1,120 × 1,120 × 1,250 mm) and weighs \u003cstrong\u003e628.3 lb\u003c\/strong\u003e net. That weight is concentrated on a small area. We therefore pass on the weight and the dimensions of the unit so the capacity of the structure can be confirmed, by an engineer if needed, before the work.\u003c\/p\u003e\n\u003cp\u003eWe also plan the lift up to the roof, the duct run between the unit and the building, access for maintenance and the clearance around the cabinet. The published sound pressure, 68 dB(A), also comes into the picture: where possible, we keep the unit away from windows, terraces and the building's air intakes.\u003c\/p\u003e\n\u003ch3\u003eThe control wiring\u003c\/h3\u003e\n\u003cp\u003eOn a roof, the unit often sits far from where the control is meant to go. Gree's universal control connection offers two possibilities: two-wire communication with the GREE controller supplied, or a standard 24 V connection to a thermostat. The communication distance can reach 30 m (98.5 ft.), and polarity-free communication avoids reversed-wire errors. Central control is provided for, and remote control is possible with a gateway offered as an option.\u003c\/p\u003e\n\u003ch3\u003ePreparing for your estimate\u003c\/h3\u003e\n\u003cp\u003eSo the visit covers the three parts in one go, have on hand, if possible:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ea photo of the electrical panel and its nameplate;\u003c\/li\u003e\n\u003cli\u003ethe building plans or a sketch of the duct system, if they exist;\u003c\/li\u003e\n\u003cli\u003ethe information on roof access (ladder, hatch or stairs);\u003c\/li\u003e\n\u003cli\u003ethe details of the current unit, if there is one, and of its location.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThat information lets us arrive with the right questions and give you a recommendation that takes the whole building into account: heating and cooling capacity, airflow, electrical supply and structure. If one of the parts calls for work beforehand, you know it before you commit.\u003c\/p\u003e\n\u003ch2\u003eCertified performance, from a heat wave to deep cold\u003c\/h2\u003e\n\u003cp\u003eOnce the air, the power and the roof are planned, the unit can deliver the performance it is certified for. Here is the data for the 4 ton:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCertified cooling at 35 °C: 47,000 BTU\/h, with an EER2 of 11.2 and a \u003cstrong\u003eSEER2 of 18.0\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eHeating at 8.3 °C: 47,000 BTU\/h.\u003c\/li\u003e\n\u003cli\u003eHeating at -8.3 °C (17 °F): 28,200 BTU\/h, certified nominal capacity.\u003c\/li\u003e\n\u003cli\u003eHeating at -15 °C (5 °F): 51,000 BTU\/h at maximum compressor speed, with a COP of 2.00.\u003c\/li\u003e\n\u003cli\u003eHSPF2 of 8.5 (region IV).\u003c\/li\u003e\n\u003cli\u003eOperating range: \u003cstrong\u003eheating down to -30 °C\u003c\/strong\u003e (and up to 24 °C outdoor), cooling from -5 °C to 52 °C.\u003c\/li\u003e\n\u003cli\u003eAHRI no. 216763053 and ENERGY STAR certificate no. 4006773.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe capacities at -8.3 °C and at -15 °C do not compare directly. The first is the certified nominal capacity; the second is measured at maximum compressor speed, under the criterion of the ENERGY STAR Cold Climate designation, hence the higher figure. The COP of 2.00 at -15 °C means the unit delivers two units of heat for every unit of electricity it uses at that temperature.\u003c\/p\u003e\n\u003ch3\u003eWhat Gree built into the unit\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\"Ultra-Heat\"\u003c\/strong\u003e technology combines two-stage, twin-cylinder compression with hot gas injection, for cold-weather heating performance. Gree adds to it high-efficiency DC Inverter technology, anti-corrosion and dust-proof construction, multiple protections, multi-parameter regulation, zero-wind start-up and an emergency operating mode. The refrigerant is R-32, with a charge of 204.6 oz. To compare this size with the other capacities and brands, see our \u003ca href=\"\/en\/collections\/thermopompe-monobloc-installation-partout-a-montreal-laval-longueuil-rive-sud-et-rive-nord\"\u003epackaged heat pumps\u003c\/a\u003e page.\u003c\/p\u003e\n\u003ch3\u003eAn estimate that covers the air, the power and the roof\u003c\/h3\u003e\n\u003cp\u003eWe assess your ducts, your panel and your roof in a single visit, then we give you a clear recommendation for the \u003cstrong\u003einstallation of your packaged heat pump\u003c\/strong\u003e. 100% free on-site estimate anywhere in Montreal, Laval, Longueuil, the North Shore and the South Shore. Call AirGreen at \u003cstrong\u003e514 316-2973\u003c\/strong\u003e. AirGreen inc., RBQ licence 5645-9605-01.\u003c\/p\u003e\n\u003ch3\u003eDocumentation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/Gree_Rooftop_R32_Thermopompe_Monobloc_Brochure_AirGreen_FR.pdf\" target=\"_blank\" rel=\"noopener\"\u003eGree Rooftop R32 brochure (French)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/Gree_Rooftop_R32_Thermopompe_Monobloc_Brochure_AirGreen_EN.pdf\" target=\"_blank\" rel=\"noopener\"\u003eGree Rooftop R32 brochure (English)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Gree","offers":[{"title":"Default Title","offer_id":56367196012836,"sku":"GK-H04TC\/NhA-D(U)","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_MONOBLOC_GREE_ROOFTOP_R32_4_TONNES_00_PROFIL_MONTREAL.png?v=1790077145","url":"https:\/\/airgreen.ca\/en\/products\/thermopompe-monobloc-gree-rooftop-r32-de-4-tonnes-montreal-laval-longueuil-rive-sud-et-rive-nord","provider":"AirGreen Climatisation \u0026 Chauffage \/ Air Conditioning \u0026 Heating","version":"1.0","type":"link"}