Compare 25,000 vs 34,000 BTU output, coverage, mounting height, fuel type and finish before choosing the right Sunpak infrared patio heater.
Choose the Sunpak S25 if you need a 25,000 BTU heater for a smaller patio, lower mounting height or tighter outdoor seating zone. Choose the Sunpak S34 if you need stronger 34,000 BTU output, a larger heated area or more impact for restaurants, outdoor kitchens and bigger patio spaces. Always confirm fuel type, finish, mounting height and clearances before ordering.
The Sunpak S25 and S34 are both permanent infrared patio heaters, but they are not interchangeable. The right model depends on how much heat the space needs, where the heater will be mounted and how the seating area is laid out.
This guide focuses on the standard S25 and S34 models. If you want high and low output settings, compare the Sunpak S34 TSH and S34 TSR two-stage models separately.
Sunpak S25 vs S34 Side by Side
| Feature | Sunpak S25 | Sunpak S34 |
|---|---|---|
| BTU output | 25,000 BTU | 34,000 BTU |
| Approximate heat coverage | About 10 ft. x 10 ft. | About 12 ft. x 12 ft. |
| Best use | Smaller patios, compact seating areas and lower-demand comfort zones. | Larger seating areas, outdoor kitchens, restaurants and spaces needing stronger heat. |
| Control style | Single-stage electronic ignition | Single-stage electronic ignition |
| Fuel options | Natural gas and liquid propane versions available. | Natural gas and liquid propane versions available. |
| Finish options | Black and stainless steel options. | Black and stainless steel options depending on configuration. |
When the Sunpak S25 Makes More Sense
The S25 is the better starting point when the heat area is focused and you do not need the full output of the S34.
For some patios, 25,000 BTU is enough. More BTU is not always better if the space is smaller or mounting is closer to the seating area.
The S25 can be a practical choice for homeowners adding permanent infrared heat to a smaller outdoor living space.
When the Sunpak S34 Is the Better Direction
The S34 is the stronger option when the patio area needs more heat impact than the S25 can provide.
The S34 is a better starting point for bigger patios, outdoor kitchens and dining areas where people are spread out.
For commercial seating, multiple S34 heaters may be easier to plan into heat zones than undersizing with smaller units.
Natural Gas, Propane, Black and Stainless Choices
Once you decide between S25 and S34, the next decision is configuration. Sunpak models are commonly available in natural gas and liquid propane versions, with black and stainless steel finish options depending on the model.
Best when the patio has a permanent natural gas supply and the heater will be installed as a fixed outdoor comfort system.
Best when the site is set up around propane supply. Confirm the exact LP model before ordering.
Black can disappear into many patio structures. Stainless gives a brighter, more visible heater appearance.
Shop Sunpak S25 and S34 Models
25,000 BTU black natural gas infrared patio heater.
View Product25,000 BTU black liquid propane infrared patio heater.
View Product25,000 BTU stainless steel natural gas patio heater option.
View Product34,000 BTU black natural gas infrared patio heater.
View ProductBrowse Sunpak S25, S34, TSH, TSR, natural gas, propane, black and stainless models.
Shop SunpakCompare Sunpak with other patio heaters and outdoor heating options.
Shop Outdoor HeatingSunpak S25 vs S34 FAQ
Is the Sunpak S34 stronger than the S25?
Which Sunpak heater covers more area?
Should I always choose the S34 because it has more BTU?
Do S25 and S34 come in natural gas and propane?
Need Help Choosing S25 or S34?
Send Aqua Terra Backyard your patio dimensions, mounting height, fuel type, finish preference and photos of the area. We can help point you toward the better Sunpak heater direction.
Shop Sunpak Heaters Shop Outdoor HeatingThis guide is for product selection and planning. Always verify current manufacturer installation instructions, clearances, fuel type, local code and professional installation requirements before ordering a gas patio heater.