The Complete Guide to Pergola Heaters for Bay Area Weather
The right heater, specified correctly and positioned well, is the difference between a pergola that gets used eleven months a year and one that sits empty on cool evenings. Here is how to think through the decision.
Why heaters matter more than people expect
The Bay Area has a reputation for mild weather, and that reputation is largely deserved. But the conditions that make outdoor spaces uncomfortable, particularly coastal fog and the marine layer that creates cool evenings even in summer, are real constraints on how much an unheated outdoor space actually gets used.
A well-positioned radiant heater under a motorized pergola extends the comfortable outdoor season significantly. The combination of closed louvers, which trap heat, and radiant heaters, which provide direct warmth without heating the air, is notably effective in the Bay Area's typical cool-evening conditions.
Radiant heat vs convective heat
Outdoor space cannot be heated effectively by heating the air. Wind, open sides, and the simple volume of space make air heating impractical. Radiant heat works differently: it heats objects and people directly, the way sunlight does, without relying on warming the surrounding air.
This is why the patio heaters that look like tall mushroom lamps with gas burners at the top perform poorly: they heat the air column around them, which immediately disperses. Radiant heaters mounted overhead and directed at the seating area provide effective, comfortable warmth even in breezy conditions.
Bromic Heating
Bromic is the premium specification choice for outdoor radiant heating in the Bay Area and globally. Their Tungsten and Platinum series are architectural fixtures in their own right, available in both gas and electric, with a design language that integrates cleanly into high-end outdoor environments.
The Bromic Tungsten Smart-Heat gas heater provides substantial BTU output suitable for larger outdoor areas or particularly cold conditions. The Platinum Smart-Heat electric series is cleaner to install, requires no gas line, and is the specification we use most frequently on covered pergola projects in Marin County and on the Peninsula.
Bromic heaters are controllable via their Smart-Heat app and integrate with home automation systems via 0-10V dimming. They can be included in outdoor scenes alongside louvers, lights, and fans.
Infratech
Infratech is a California manufacturer based in Commerce with 60 years of outdoor heating experience. Their electric infrared heaters are specified by landscape architects and outdoor designers throughout the Bay Area and are a strong alternative to Bromic, particularly on projects where the California manufacturing origin is meaningful to the client or where Infratech's specific form factors better suit the installation geometry.
Infratech heaters are available in single and dual element configurations with outputs from 1,500 to 6,000 watts. They integrate with most control systems via 0-10V dimming and can be wired into Lutron, Control4, and other home automation platforms.
Gas vs electric: how to decide
Gas heaters provide higher BTU output and are the right choice for larger spaces, particularly spaces that need to be heated even in winter conditions or that are open on multiple sides. The trade-off is that they require a gas line run to the structure, which adds to the electrical and plumbing scope of the project.
Electric heaters are simpler to install, require no gas line, and produce zero combustion byproducts under the closed louvers. For most Bay Area residential pergola projects, where the winters are mild and the structure is enclosed by louvers when heaters are in use, electric heaters are the practical specification. They are what we install on the majority of our projects.
Placement and coverage
Heater placement matters as much as heater selection. A heater positioned over a walkway rather than a seating area is largely wasted. The goal is to position heaters directly above the zones where people will be sitting, with the beam angled appropriately for the mounting height.
We design heater placement as part of the overall pergola design, not as an afterthought. The number of heaters, their wattage, and their positions are calculated based on the space dimensions, the expected cold-weather use, and the degree of enclosure that the louvers and screens provide.
A common mistake: Underspecifying heater capacity to reduce upfront cost, then finding the space is not comfortable on cool evenings. It is less expensive to add heating capacity during the project than to retrofit additional heaters after installation. We would rather have the conversation about capacity upfront.
Want to talk through heating options for your project?
Heater selection is part of every design conversation. Contact us to start the process.
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