Natural Gas Tankless Water Heaters
Natural Gas Tankless Water Heaters — Whole-Home On-Demand Hot Water for Canadian Homes
If your home is connected to the natural gas grid, a natural gas tankless water heater is typically the most cost-effective long-term hot water solution available. Natural gas costs less per BTU than electricity in most Canadian provinces, and a tankless unit only fires when hot water is actually being drawn — no standby heat loss, no keeping a 40-gallon tank warm overnight.
This collection covers the Camplux 5.28 GPM natural gas tankless lineup — the high-output whole-home models available in indoor and outdoor configurations, in gray and white. These are the units suited to a two-to-three bathroom Canadian home where multiple fixtures may run simultaneously. If you're looking for lower-output models or propane options, see the Gas Tankless Water Heaters collection for the full range, or Propane Tankless Water Heaters if you're off the gas grid.
Why Natural Gas Is the Right Fuel for City Homes in Canada
In most Canadian provinces where natural gas is available — Ontario, BC, Alberta, Saskatchewan, Manitoba — natural gas rates are significantly lower than electricity rates on a per-BTU basis. For a household that uses hot water heavily, the operating cost difference between a natural gas tankless unit and an electric tankless unit adds up meaningfully over a heating season.
The other advantage is output. Natural gas tankless units can deliver higher flow rates than most residential electric tankless units without requiring a panel upgrade. A 5.28 GPM natural gas unit handles three simultaneous fixtures — two showers and a kitchen tap, for example — where an equivalent electric unit would require 27kW or more of dedicated electrical capacity.
For homes already on the natural gas grid with an existing gas line near the installation point, a natural gas tankless unit is a straightforward upgrade from a storage tank. The installation requires a licensed gas fitter and proper exhaust venting, but the ongoing operating cost and performance advantages are substantial.
5.28 GPM — Is It Enough for Your Home?
5.28 GPM is the output rating under standard test conditions. In Canadian winter conditions, where inlet water temperatures can drop to 2–5°C in colder provinces, actual output at a given temperature rise will be lower. Here's how to think about it:
- A standard shower uses roughly 1.5–2.5 GPM at 38–40°C output temperature
- A kitchen tap uses roughly 1–1.5 GPM
- A dishwasher uses roughly 1–2 GPM
In a moderate Canadian climate (BC coast, southern Ontario), 5.28 GPM comfortably handles two simultaneous showers or a shower plus kitchen use. In colder provinces (Alberta, Manitoba, Saskatchewan) where winter inlet temperatures are lower, the effective output at full temperature rise is reduced — plan for two simultaneous fixtures rather than three during peak winter demand.
For larger homes or households with consistently high simultaneous demand, consider whether a higher-output unit or a parallel installation would better suit your needs. For most two-to-three bathroom Canadian homes, 5.28 GPM is the right specification.
Indoor vs. Outdoor Natural Gas Tankless — Which to Choose
The indoor 5.28 GPM units — available in white and gray at $913.99 — use a sealed combustion system and require a dedicated exhaust vent through an exterior wall or vertical flue. Indoor installation protects the unit from weather year-round and is the standard choice for whole-home residential use. Installation must be performed by a licensed gas fitter and requires a permit in most Canadian provinces.
The outdoor 5.28 GPM units — available in gray and white at $1,299.99 — mount on an exterior wall and exhaust combustion gases directly into open air, eliminating the interior venting requirement. Outdoor installation is a practical option when running an interior vent isn't feasible. The tradeoff is weather exposure: outdoor units must be protected from freezing during Canadian winters when not in use. For year-round residential use in cold climates, indoor installation is generally the more reliable long-term choice.
Installation Requirements for Natural Gas Tankless Water Heaters in Canada
Natural gas appliance installation in Canada is regulated. In most provinces, the following apply:
- A permit is required before installation begins
- Installation must be performed by a licensed gas fitter (also called a gas technician or gas contractor, depending on the province)
- The installation must pass inspection by the local authority having jurisdiction (AHJ)
- Indoor units require a dedicated exhaust vent that meets local code requirements for combustion appliances
- The gas supply line must be sized appropriately for the unit's BTU demand — confirm with your gas fitter before ordering
All Camplux natural gas tankless water heaters in this collection are CSA-certified for Canadian residential use. Bring the product specifications to your gas fitter before installation to confirm compatibility with your existing gas supply and venting situation.
Natural Gas vs. Propane vs. Electric — Quick Comparison
Natural gas offers the lowest operating cost per BTU in most Canadian provinces where gas is available. Requires a gas line connection and licensed installation. Best for: city homes and suburban properties already on the gas grid.
Propane works identically to natural gas but runs on propane — the right choice for rural properties, cottages, and off-grid setups without a gas line. See Propane Tankless Water Heaters.
Electric requires no gas line or venting permit, but draws significant amperage for whole-home use and has higher operating costs in most provinces. See Electric Tankless Water Heaters.
For a full comparison of all tankless options, see the Tankless Water Heater overview or the Tankless Water Heater Canada page for Canadian-specific buying guidance.
Frequently Asked Questions
How do I know if my home has natural gas?
If your home has a gas furnace, gas range, or gas dryer, you're on the natural gas grid. You can also check your utility bills — if you receive a bill from a gas utility (Enbridge, FortisBC, ATCO Gas, etc.), you have a natural gas connection. If you're on propane, you'll have a propane tank on your property rather than a gas meter.
Can I install a natural gas tankless water heater myself?
In most Canadian provinces, no. Gas appliance installation requires a permit and a licensed gas fitter. Attempting a DIY gas installation can void your home insurance and create serious safety risks. Contact a licensed gas fitter for installation.
Will a 5.28 GPM unit work in a cold Canadian winter?
Yes, but output at full temperature rise is reduced when inlet water is very cold. In moderate climates (BC coast, southern Ontario), 5.28 GPM handles two to three simultaneous fixtures year-round. In colder provinces, plan for two simultaneous fixtures during peak winter demand. If your household has consistently high simultaneous demand in winter, discuss your specific situation with a licensed gas fitter before purchasing.
What's the difference between the gray and white models?
The gray and white versions are identical in performance and specifications — the difference is cosmetic only. Choose based on your installation location and aesthetic preference.