How to market a net zero or Passive House project with a short video and accurate claims
How to market a net zero or Passive House project: show airtightness, ventilation and solar on film, use certification terms exactly and avoid greenwashing.
In this article
A Passive House or net zero project is hard to photograph for the same reason it's impressive: the performance is invisible. Airtightness is tape behind drywall, ventilation is a box in a closet, and the best evidence is a utility bill nobody wants to post. Meanwhile "sustainable" and "net zero" appear in so much marketing that readers have learned to skim past them. This guide covers what to show so performance becomes visible in a short film, how to word certification claims so they're exactly true, how to stay clear of greenwashing under the FTC's Green Guides, and a six-image plan for a 30-second project film.
Key takeaways
- Show the visible evidence of invisible performance: deep window reveals, triple-pane units, exterior shading, the ventilation unit, the solar array and the comfortable, daylit rooms they produce.
- Put the numbers in the caption, not the film, and say whether each one is modeled or measured.
- Use the certifier's exact terms and stage: Phius distinguishes Design Certification from Final Certification, and the Passive House Institute certifies Classic, Plus and Premium classes, with EnerPHit for retrofits.
- The FTC's Green Guides say marketers "should not make unqualified general environmental benefit claims," so replace "eco-friendly" with the specific benefit you can substantiate.
- Use real photos for construction-stage evidence such as membranes and blower door tests, and label any animated or rendered views as what they are.
How to market a net zero or Passive House project
Market a net zero or Passive House project by making its invisible performance visible: show the details that cause it, such as thick walls, triple-pane windows, shading, the ventilation unit and the solar array, and the result, which is quiet, bright, even comfort. State only the certification and performance claims you can document, in the certifier's exact wording and at the right stage, with the numbers and whether they're modeled or measured in the caption. Swap vague words like "green" for specific, substantiated benefits.
The audience is usually two groups at once. Prospective clients want comfort, health, quiet and lower bills; peers and specifiers want details and data. A short film can win the first group's attention, and the caption and project page can satisfy the second.
Make the invisible visible: what to show for each principle
Phius describes passive building through principles you can actually point a camera at: continuous insulation "without any thermal bridging," "an extremely airtight building envelope," "high-performance windows (double or triple-paned) and doors" with managed solar gain, "balanced heat- and moisture-recovery ventilation," and "a minimal space conditioning system" (Phius, Passive Building FAQs, as of October 2026). Each one has a visible trace.
| Principle | What you can show | What the caption carries |
|---|---|---|
| Continuous insulation, no thermal bridges | Deep window reveals that show wall thickness; a wall section drawing; exterior insulation during construction (real photo) | Wall assembly and insulation approach in plain words |
| Airtightness | Taped membranes and window connections before drywall (real photo); the blower door set up on test day (real photo) | The blower door result, with the unit and test date |
| High-performance windows and shading | Triple-pane units, deep overhangs, exterior blinds or screens | Window type and orientation strategy |
| Balanced ventilation | The heat- or energy-recovery ventilator in its closet; quiet supply diffusers in finished rooms | Ventilation type and what it does for air quality |
| Minimal space conditioning | A small heat pump unit where a furnace would usually be | Heating and cooling system and its size |
| Renewables, for net zero | The solar array on the roof or carport | Array size and whether net zero is modeled or measured, over what period |
The finished rooms are part of the evidence. A big south window with no curtains drawn against glare, a quiet bedroom on a busy street, a living room that's comfortable in January: that's what the principles feel like, and it's what clients are buying.
Certification claims: use the certifier's exact words
Certification is where accurate wording matters most, because each program has stages and names, and using them loosely misstates where the project stands.
Phius. Phius offers two tiers. Phius ZERO "pushes further than the flagship Phius CORE, by achieving all of the same requirements and also netting out energy use on an annual basis with renewable energy" (Phius FAQs). Certification comes in two steps: "Design Certification is awarded after the feedback process is complete and the project meets all requirements," and final certification follows after a Phius rater or verifier "performs site visits" and the documentation is submitted once "all on-site inspection and testing is complete" (Phius, Submit a Project, as of October 2026).
Passive House Institute. PHI certifies buildings to the Passive House and EnerPHit standards, with classes defined by renewable generation: Classic, "without renewable energy generation"; Plus, where "on an annual average, energy generation equals energy consumption"; and Premium, where "significantly more energy is generated than consumed." EnerPHit "is the established standard for the energy-efficient retrofit of existing buildings" (Passive House Institute, as of October 2026).
DOE. The Department of Energy's program for homes "so energy efficient that a renewable energy system could offset most or all the home's annual energy use" has been renamed: "The DOE Zero Energy Ready Home program is now known as DOE Efficient New Homes," and homes are "verified by a qualified third-party as part of the certification process" (DOE Efficient New Homes, as of October 2026). Use the current name for new projects.
| Where the project stands | Accurate way to say it | Avoid |
|---|---|---|
| Designed to the standard, not submitted | "Designed to Phius CORE criteria" or "designed using Passive House principles" | "Passive House certified" |
| Design certification awarded | "Received Phius Design Certification" | "Certified Passive House" with no qualifier |
| Final certification awarded | "Phius CORE certified" or "Phius ZERO certified," as awarded; for PHI, "Certified Passive House" with the class awarded, such as Plus | Mixing programs, such as "PHI-certified Phius ZERO" |
| No certification, solar sized to offset use | "Solar array sized to offset the home's modeled annual energy use" | "Net zero home" with no basis |
| A year of utility data showing net zero | "Produced more energy than it used from [month, year] to [month, year]" | Implying future years are guaranteed |
Check the certificate or the certifier's project listing before you post, and read the certifier's own rules before using its name or logo in marketing. If the project is mid-process, say so: "final certification pending" is a perfectly good caption.
Net zero, carbon neutral and "green": avoiding greenwashing
The FTC's Green Guides set out how environmental marketing claims are read and substantiated; the FTC's page lists the most recent revision as October 1, 2012 (FTC, Green Guides, as of October 2026). Two sections matter most for a project film.
On broad claims, the Guides say "unqualified general environmental benefit claims are difficult to interpret and likely convey a wide range of meanings," that marketers "should not make unqualified general environmental benefit claims," and that a claim can be qualified with "clear and prominent qualifying language that limits the claim to a specific benefit or benefits" (16 CFR 260.4). "An eco-friendly home" is the kind of claim that section warns against; "a home designed to use about as much energy as its rooftop solar produces in a year, based on the energy model" is specific.
On certifications, the Guides treat a certifier's name, logo or seal as a possible endorsement, and add that "third-party certification does not eliminate a marketer's obligation to ensure that it has substantiation for all claims reasonably communicated by the certification" (16 CFR 260.6). A seal in the end card doesn't let the film claim more than the certification covers.
Practical rules that follow:
- Say "net zero energy" if you mean energy, and don't let it slide into "carbon neutral" or "zero emissions," which are different claims.
- Say whether the figure is modeled or measured, and over what period.
- Name the benefit: lower energy use, filtered fresh air, quiet, even temperatures.
- Don't imply the house has no environmental impact; construction, materials and the site all have one.
This is general information, not legal advice; for advertising that makes numerical environmental claims, check with counsel.
A six-image plan for a 30-second performance film
A short film can't prove performance, and it shouldn't pretend to. Its job is to make a viewer curious enough to read the caption and the project page. Six finished images can do that:
- Exterior with the solar array visible, at an angle that also shows the overhangs.
- A deep window reveal, shot close, so the wall thickness reads at a glance.
- The main living space in daylight, large glazing and shading in view.
- The ventilation unit or a quiet diffuser, tidy and well lit.
- A wall section drawing, clean and legible on a phone.
- Dusk exterior, warm windows, a calm closing scene.
Arch2Video makes this kind of film from exactly six images of one project, including drawings, and returns a 1080 × 1920 vertical MP4 of about 30 seconds with six connected five-second AI-generated scenes and an original soundtrack, for USD 15 per video. The AI director plans the order, and every film includes a small cast of original, fictional adults in at least one scene, which suits a film about comfort. AI motion is an interpretation of each image, so it shows the house, not its performance; keep construction-stage evidence such as taped membranes and blower door tests as real, unanimated photos in a carousel or on the project page, the same principle as never letting AI finish a site photo. If any image is a rendering of an unbuilt project, label the film as concept work; disclosure wording for AI and rendered images has examples.
Where to use it and how to caption it
Instagram and LinkedIn. Lead with the human benefit, then the facts, using a template like: "[Size] family home on a busy street, quiet inside and heated by one small heat pump. [Certification as awarded], [month, year]. Blower door result: [your number and unit]. Solar sized to offset modeled annual use." Fill in your project's own figures; never round toward the target. LinkedIn video for design firms covers posting from the company page versus a principal.
The project page. Put the film at the top, then the certification and its stage with a link to the certifier's listing, the energy model summary, test results, the wall assembly and the team, including the consultant and the rater or verifier. A case study page template gives a structure.
After a year. If you can get the owner's permission to share a year of utility or monitoring data, a short follow-up post with measured results is the most credible thing you'll publish about the project.
Frequently asked questions
Can I call my project a Passive House before it's certified?
Describe it accurately for the stage it's at. "Designed to Phius CORE criteria" or "designed using Passive House principles" is accurate before certification; "received Phius Design Certification" is accurate once that's awarded; "Phius CORE certified" or "Certified Passive House" belongs after final certification from the relevant certifier. If certification is in progress, "final certification pending" is honest and still good marketing.
Do I need to qualify "net zero" in my marketing?
You should say what it means and what it's based on. The FTC's Green Guides warn against unqualified general environmental claims and call for clear qualifying language that limits a claim to specific benefits. In practice, say "net zero energy," state whether it's modeled or measured and over what period, and don't stretch it to "carbon neutral." This is general information, not legal advice.
How do I show airtightness in a video?
Show its traces. Real photos of taped window connections and membranes before drywall, and of the blower door set up on test day, are the evidence; the test result with its unit and date goes in the caption. Keep those images real rather than AI-animated, and pair them with finished-room views that show what the airtightness delivers: quiet, draft-free comfort.
Can an AI video show a building's energy performance?
No. An AI video animates the images you give it, so it can show the house, the solar array, the windows and the rooms, but not how much energy the building uses. Performance belongs in the caption and on the project page, with the certification, the model or test results and their dates. Use the film to make people curious enough to read them.