Brand hub
GSW water heaters in Canada
GSW is a Canadian water-heater brand of the A. O. Smith group with conventional gas tanks, the Envirosense high-efficiency and Polaris families, and Adapt tankless series. It is one of the highest-volume tank brands sold in British Columbia, and CANRO names it among the brands it services.
At a glance
- Official site
- Global site
- Canadian office
- Not published
- CANRO supplies
- Confirmed at consultation
- CANRO services
- Confirmed at consultation
- Authorized dealer
- Not claimed until confirmed
- Documented
- 10 series · 0 models · 0 codes
Where CANRO provides on-site service
On-site service is currently offered across Metro Vancouver: Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Delta, Langley, Port Moody, Port Coquitlam, Maple Ridge, Pitt Meadows, White Rock, Tsawwassen; plus Anmore, Belcarra, Lions Bay, Bowen Island, Abbotsford with travel or ferry arrangements confirmed by phone. Everything else on this site is reference information you can use anywhere in Canada.
About GSW
GSW is part of the A. O. Smith family's Canadian water-heating brands, with atmospheric, direct-vent, power-vent and power-direct-vent gas tanks, the Envirosense power-vent and power-direct-vent high-efficiency families (including SF versions with side connections for combination space heating), Polaris, and the Adapt+ Premium, Adapt SC and Adapt NC tankless lines.
WaterHeating.ca adds GSW series and model records as their Canadian sheets are verified; availability for a specific model is confirmed at consultation. CANRO names GSW among the brands it services on its own pages.
Series
GSW series
Each series hub lists its models, verified specifications, manuals and documented fault codes.
Atmospheric vent gas tanks
currentThe GSW Atmospheric Vent gas water heater is the brand's entry-level residential gas tank, published by GSW with the Flame Guard safety system, a glass-lined tank, a heavy-duty anode rod, a turbulator dip tube, a piezoelectric ignitor and an LED pilot and diagnostics indicator.
Gas storage tankNatural gasPower vent gas tanks
currentThe GSW Power Vent gas water heater is a residential gas tank for homes where conventional chimney venting is not an option: a rotatable motorized blower forces the exhaust outside, and GSW lists flexible 2 in, 3 in or 4 in ULC S636 plastic venting up to 180 equivalent feet.
Gas storage tankNatural gasThe GSW Envirosense Power Vent is an ENERGY STAR Qualified condensing gas water heater with a spiral heat exchanger, published by GSW with 94% thermal efficiency, a 22 in diameter cabinet, two anode rods and hot and cold side taps for combination systems.
Gas storage tankNatural gasthermal-efficiency 94The GSW Adapt SC is a standard condensing gas tankless water heater published by GSW with 199,000 BTU/h input, 0.95 UEF, ENERGY STAR certification, X3 Scale Prevention technology and a 15-year limited heat exchanger warranty.
Gas tanklessNatural gasUEF 0.95The GSW condensing tankless gas water heater is powered by Takagi and published by GSW with a 0.93 Uniform Energy Factor, a commercial-grade copper primary heat exchanger, a Type 316L stainless steel secondary exchanger, ULC S636 plastic or Category III/IV stainless venting, and internal freeze protection.
Gas tanklessNatural gasUEF 0.93Direct vent gas tanks
currentThe GSW Direct Vent gas tank is a sealed-combustion, chimney-free water heater that draws combustion air from outdoors through a coaxial vent and vents outside without a blower, published by GSW with a thermopile pilot, LED diagnostics, a glass-lined tank and a top-mounted heavy-duty anode rod.
Gas storage tankNatural gasPower direct vent gas tanks
currentThe GSW Power Direct Vent gas tank is a sealed-combustion water heater for rooms where inside air cannot be used for combustion, drawing combustion air from outside and using a rotatable motorized blower to force the exhaust out, published by GSW with the TankSaver tank design and flexible plastic venting.
Gas storage tankNatural gasThe GSW Envirosense power direct vent is a high-efficiency condensing gas storage water heater with a spiral heat exchanger, published by GSW at 96% thermal efficiency and ENERGY STAR qualification with 50 or 75 USG capacity, an AiQ adaptive gas valve, a leak detection module and a powered anode.
Gas storage tankNatural gasthermal-efficiency 0.96The GSW Polaris is a high-efficiency condensing gas water heater built for combination systems, published by GSW with a 444 stainless steel tank, a submerged combustion chamber and spiral flue rated at up to 96% thermal efficiency, an ultra-quiet blower and a three-light self-diagnostic system.
Gas storage tankNatural gasthermal-efficiency 0.96The GSW Envirosense SF is a fully condensing, side-fire gas storage water heater published by GSW with 93% thermal efficiency and ENERGY STAR qualification, side-mounted hot and cold recirculating taps for combination systems and dual sacrificial heavy-duty anodes.
Gas storage tankNatural gasthermal-efficiency 0.93
Models
GSW models with verified specifications
No models documented yet.
Services
CANRO services for GSW water heaters
On-site service in Metro Vancouver. Brand and model context is kept when you request service.
Fault codes
GSW error codes and status lights
Documented meanings resolved against the specific series, control platform and manual version. A code is not a diagnosis.
No codes documented yet.
Manuals and documents
Official documentation
Links go to the manufacturer's own documents. WaterHeating.ca does not reproduce manuals.
- Atmospheric vent gas — spec sheetAtmospheric vent gas tanks · Canadian document
- Standard atmospheric vent — installation manualAtmospheric vent gas tanks · Canadian document
- GSW residential — warranty sheetAtmospheric vent gas tanks · Canadian document
- Power vent gas — spec sheetPower vent gas tanks · Canadian document
- Power vent gas — installation manualPower vent gas tanks · Canadian document
- GSW residential — warranty sheetPower vent gas tanks · Canadian document
- Envirosense power vent gas — spec sheetEnvirosense power vent gas tanks · Canadian document
- Envirosense power vent gas — installation manualEnvirosense power vent gas tanks · Canadian document
- Adapt SC standard condensing tankless — spec sheetAdapt SC standard condensing tankless · Canadian document
- Adapt SC standard condensing tankless — installation manualAdapt SC standard condensing tankless · Canadian document
- Adapt SC standard condensing tankless — warranty sheetAdapt SC standard condensing tankless · Canadian document
- Condensing tankless gas — spec sheetCondensing tankless gas (powered by Takagi) · Canadian document
- Condensing tankless gas — installation manualCondensing tankless gas (powered by Takagi) · Canadian document
- Condensing tankless gas — service manualCondensing tankless gas (powered by Takagi) · Canadian document
- Condensing tankless gas — residential warranty sheetCondensing tankless gas (powered by Takagi) · Canadian document
- Direct vent gas — spec sheetDirect vent gas tanks · Canadian document
- Direct vent gas — installation manualDirect vent gas tanks · Canadian document
- GSW residential — warranty sheetDirect vent gas tanks · Canadian document
- Power direct vent gas — spec sheetPower direct vent gas tanks · Canadian document
- Power direct vent gas — installation manualPower direct vent gas tanks · Canadian document
- GSW residential — warranty sheetPower direct vent gas tanks · Canadian document
- Envirosense power direct vent gas — spec sheetEnvirosense power direct vent gas tank · Canadian document
- Envirosense power direct vent gas — installation manualEnvirosense power direct vent gas tank · Canadian document
- Envirosense power direct vent — 400/401 series manualEnvirosense power direct vent gas tank · Canadian document
- Polaris high-efficiency condensing gas — spec sheetPolaris high-efficiency condensing gas tank · Canadian document
- Polaris high-efficiency condensing gas — installation manualPolaris high-efficiency condensing gas tank · Canadian document
- Envirosense SF gas — spec sheetEnvirosense SF condensing gas tank · Canadian document
- Envirosense SF gas — 120 series installation manualEnvirosense SF condensing gas tank · Canadian document
- Envirosense SF gas — side-fire installation manualEnvirosense SF condensing gas tank · Canadian document
- Envirosense SF gas — warranty insertEnvirosense SF condensing gas tank · Canadian document
Useful advice
- Tank vs Tankless Water Heater: Which Is Right for a Metro Vancouver Home?
- Repair or Replace a Water Heater: The Decision Framework
- Water Heater Capacity: Nominal Volume, First-Hour Rating and Recovery
- UEF Explained: How to Read a Water Heater Efficiency Number
- Venting Types Explained: Atmospheric, Power Vent, Direct Vent and Tankless
- Water Heater Permits and Inspections in BC: Gas, Plumbing and Homeowner Rules
- Water Heater Maintenance Schedule for Gas Tanks and Tankless Units
- Hot-Water Recirculation Explained: Tankless, Tank and the Wait at the Tap
- Water Heater Temperature Settings and Scald Safety in BC
- Gas Water Heater Installation Constraints: What Has to Be True Before It Goes In
- Does a Tankless Water Heater Need a Bigger Gas Line? Supply and Meter Capacity in BC
- Tankless in a Vancouver Winter: Cold Inlet Water, Flow and Freeze Protection
- What Goes Into the Lifetime Cost of a Gas Water Heater
- How Long Does a Gas Water Heater Last? Lifespan, Age and Replacement Timing
- Gas Water Heater Replacement in a Strata or Condo: Permits, Access and Approval
- Do Gas Water Heaters Work in a Power Outage?
- What Size Tankless Water Heater Does a Vancouver Home Need?
- What a Gas Water Heater Warranty Covers — and What It Does Not
- Gas Water Heater Replacement: What to Expect on Installation Day
- Gas Water Heater Earthquake Strapping in BC
- Water heater types explained
Frequently asked questions
Is GSW sold across Canada?
Yes, through Canadian wholesale channels. Specific model availability and ratings are confirmed at consultation and added here as the Canadian sheets are verified.
Does CANRO service GSW?
CANRO names GSW among the brands it services on its own pages.
Need help with a GSW water heater?
Describe what the water heater is doing and get a straight answer about the next step.
On-site service in Metro Vancouver, BC. Call to check availability.
Sources and verification
- GSW — official site · accessed September 7, 2026
- CANRO Heating & Cooling — Contact (brands serviced) · Canadian source · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.