DURASTAR Sirius Heat Wall-Mounted Heat Pump | 6000 BTU - R454B
SEER2 (Seasonal Energy Efficiency Ratio)
HSPF2 (Seasonal Heating Efficiency)
EER2 (Instantaneous cooling efficiency)
COP at -8 °C (Heating energy efficiency)
COP at -15 °C (Heating energy efficiency)
COP at -30 °C (MAX)
CFM (Airflow)
A Small Room Deserves a Unit Its Size
Most of the rooms we want to heat and cool in Quebec are not 600-square-foot living rooms. They are children's bedrooms, home offices, studios, or guest rooms where an oversized unit simply starts and stops without ever finding its rhythm. The DURASTAR Sirius Heat Wall-Mounted Heat Pump | 6,000 BTU - R454B meets this need precisely: a compact format, a wall-mounted heat pump certified for extreme cold, and one of the best seasonal efficiencies in the DuraStar lineup.
Its AHRI-certified ratings are 25.3 SEER2 for cooling, 16.0 EER2, and 14.6 HSPF2 for heating, the best seasonal heating rating of all the DuraStar wall-mounted heat pumps we offer. The system is ENERGY STAR certified with the cold-climate designation, and it operates in heating mode down to -30 °C.
Why Oversizing Costs More in a Small Room
A compressor that is too large for the space reaches the setpoint within minutes, then shuts off. These short cycles wear out components, leave humidity in the air during summer, and create uncomfortable temperature swings. The Sirius Heat 6,000 BTU avoids this problem with its variable-speed compressor: in cooling mode, its certified range is from 2,500 to 11,500 BTU/h, and in heating mode from 3,200 to 10,700 BTU/h at 8 °C. It can therefore run for long periods at low speed, which is essential for stable comfort and effective dehumidification.
This upward capacity range also matters. An attic bedroom facing west may require much more than its floor area would suggest in the late afternoon in July. The unit has the necessary reserve for these peaks, then returns to a discreet operating level.
Certified Heating Performance Figures
- Capacity at 8 °C: 7,000 BTU/h
- Capacity at -8 °C: 8,000 BTU/h, with a COP of 2.49
- Capacity at -15 °C: 7,500 BTU/h, with a COP of 2.29
- Maximum capacity at -30 °C: 3,900 BTU/h, with a COP of 1.22
- Operating range: from -30 °C to 24 °C in heating mode, from -30 °C to 50 °C in cooling mode
Capacity at -8 °C exceeds the nominal capacity. This is normal behavior for an inverter compressor, which slows down in mild weather and speeds up as demand increases. These figures come from certificate AHRI 215359242, published by NEEP, rather than from a marketing sheet.
What COP Means for Your Electricity Bill
An electric baseboard converts one kilowatt-hour into one kilowatt-hour of heat, regardless of the outdoor temperature. At -8 °C, this unit provides nearly two and a half times as much heat for the same amount of electricity. At -15 °C, it still provides more than twice as much. In an enclosed room heated with electricity, the difference quickly becomes apparent on your Hydro-Québec bill, since the vast majority of heating hours in a season in Montreal are above -10 °C.
LogisVert: What You Need to Know About This Size
This system does not appear on the current list of heat pumps eligible for Hydro-Québec's LogisVert program, which explains the $0 value shown on the technical sheet. If the subsidy is essential to your project, the 12,000 BTU model from the same Sirius Heat series is listed. Its ENERGY STAR identifier is 3621138: we always check the current list as of your scheduled installation date, since it changes throughout the year.
Installing a 6,000 BTU Unit Without Compromise: Location, Circuit, and Maintenance
A small unit should not be installed casually. The same rules apply as for a larger format, and some become even more important in a ten-by-twelve-foot room.
The Indoor Unit
The wall-mounted unit measures 28.70 x 7.87 x 11.50 inches and weighs 17.6 pounds. It operates between 20 and 42 dB(A) depending on fan speed, with a maximum airflow of 294 CFM in Turbo mode. At the lowest setting, its sound is comparable to a whisper, making it a good choice for a bedroom. We position it so that the airflow does not blow directly onto the bed or workstation. The vertical louver is adjusted automatically with the remote, while the left-to-right direction is adjusted manually during commissioning.
The wireless remote offers Follow Me, which measures the temperature where you are, ECO/GEAR to limit cooling energy consumption, Sleep, Silence, Turbo, and Active Clean, which cleans and dries the indoor coil. An 8 °C freeze-protection function is also included. Wi-Fi is not built in: DuraStar offers a Wi-Fi adapter module sold separately, and the unit is compatible with the DRSTAT101 wall thermostat.
The Outdoor Unit
The condenser measures 30.12 x 11.93 x 21.85 inches, weighs 62.2 pounds, and produces 53 dB(A). It includes a base-pan heater that prevents defrost water from freezing beneath the unit, as well as an anti-corrosion coating on the fins. We install it on a wall or ground support, always elevated above the snow line, with sufficient clearance for unrestricted airflow.
Refrigerant Lines and Refrigerant
The system uses 1/4- and 3/8-inch lines, precharged for 25 feet. The length can reach 82 feet, with a maximum elevation difference of 49 feet and an addition of 0.16 ounces of refrigerant per extra foot. R-454B is an A2L refrigerant with low global-warming potential, so the indoor unit includes a factory-installed refrigerant leak detector. Our installations are fully exposed, with no work inside the walls, and a finished line-set cover can be added to protect the lines.
Electrical Supply
208-230 V single-phase power supply, 12 A MCA, and a 15 A circuit breaker. A dedicated 15 A circuit is sufficient, greatly simplifying the addition of a unit in a duplex or condo where the electrical panel is already quite full.
What Is Normal and What Is Not
- A white mist coming from the outdoor unit in winter: this is steam from the defrost cycle.
- A slight hissing sound when starting or stopping: this is the refrigerant changing direction.
- A three-minute delay before restarting after a shutdown: this is compressor protection.
However, a burning smell, a circuit breaker that repeatedly trips, or water leaking from the indoor unit requires shutting the unit off and calling a technician.
Maintenance in Three Steps
- Clean the indoor filters every two weeks during periods of intensive use, as recommended by DuraStar.
- Clear the outdoor unit of snow, ice, and leaves.
- Schedule annual HVAC maintenance: coil cleaning, condensate drainage inspection, and electrical connection checks.
Why Entrust This Project to AirGreen
We have been installing wall-mounted heat pumps in Montreal, Laval, Longueuil, the North Shore, and the South Shore for more than fifteen years. We hold RBQ licences for ventilation, refrigeration, and electrical work, and carry $5,000,000 in liability insurance. Before recommending a 6,000 BTU unit, we assess the insulation, windows, and actual use of the room: if a 9,000 BTU unit is needed, we will tell you.
Request your free estimate for the DURASTAR Sirius Heat Wall-Mounted Heat Pump | 6,000 BTU - R454B. We will assess the room, confirm the right size, and provide you with a clear, detailed quote.