Plenum Commercial HVAC website template

Plenum is for commercial ventilation and HVAC contractors who work in factories, restaurant kitchens, schools and clinics. A visitor can get a typical price on the home page in a minute, look through finished projects described by building type, and send a request with the estimate already filled in.

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Who Plenum is for

Built for these, and tested against them.

Commercial ventilation contractor working in factories, restaurant kitchens, schools and clinics
Mechanical subcontractor whose buyers are facilities and operations managers
Kitchen extract and canopy installer that also cleans and certifies ductwork
HVAC firm that wants an instant estimate on the home page carried into a request form
Industrial air-handling and heat-recovery installer showing finished projects by building type
Contractor with a planned maintenance offer and a night-time breakdown line
Commercial air-conditioning and controls company that phases work around open buildings

What’s included

Everything below ships with the template, already filled in.

Pages: 7 pages, written and laid out
Grows with you: 6 project entries at /projects/, 4 post entries at /journal/, 4 member entries at /team/ — add one and its index and detail page both update
Enquiries: A working form — messages land in your Sitelas inbox
Fonts: Montserrat and Roboto · light theme
Everywhere: Built and checked at phone, tablet and desktop widths
Yours to change: Every colour, word and photograph — in the editor or by asking an AI agent

Build Plenum by asking your AI agent

No editor required. The agent writes your copy, swaps the photos and publishes the site.

1Connect Sitelas to Claude, ChatGPT or another AI agent that supports MCP. How to connect
2Ask for it in plain words: “Build a website for a commercial ventilation contractor working in factories, restaurant kitchens, schools and clinics using the Plenum template.”
3Open the preview link it sends back, ask for changes, and publish when it reads right.

Then keep changing it from the same chat

Rewrite the copy“Rewrite every page in a warmer, friendlier voice.”
Change the design“Make the colours earthier and use a serif for headings.”
Add or remove pages“Add a Pricing page and remove the Blog.”
Rearrange sections“Move the testimonials higher and add an FAQ.”
Swap the photos“Replace the photos with ones that fit my business.”
Run the site“Show me this week's form messages, then publish.”

Everything here can also be done by hand in the visual editor.

About the Plenum template

Built for commercial ventilation and HVAC contractors

Plenum suits a mechanical contractor that works in factories, kitchens, schools and clinics. A visitor can get a typical price on the home page in a minute, see buildings like theirs in the projects, and send a request with the total already filled in.

What's on the site

Home — an instant estimate, your services, projects, the sectors you serve, a founder's note, credentials, testimonials and articles
Our services — four services, a numbered FAQ and a section on your own fabrication workshop
About us — your story, maintenance contracts, your team and recent projects
Projects — every project with its own page of facts
Journal — articles, each with its own page
Free estimate — a cost calculator and a request form that receives its total
Contact — a service request form with a preferred date and time, your address on a map, phone and hours

What to know

Projects, articles and team members are collections, so you add one and it appears. Requests land in your Sitelas inbox. The calculator's prices, the figures, the testimonials and the team are samples to replace.

When to pick something else

Plenum is the wrong template for these. Where there is a better one, it is linked.

Household plumber fixing leaks, drains and water heaters — try Flange
Furnace, boiler and heat pump installer for homeowners — try Flue
Electrical contractor publishing call-out rates and test certificates — try Busbar
General contractor putting up whole buildings — try Girder
Emergency trade wanting a loud, dark, phone-first look — try Conduit
Shop selling fans, filters or spare parts with a checkout — try Stockroom
One-van sole trader covering a postcode area — try Mainstay

Free to use · No credit card required

1Opens in the editor with the starter content in place
2Change the words and pictures to yours
3Publish to a sitelas.com address, or your own domain

Key Highlights

An instant estimate on the home page whose total carries into the request form

A full cost calculator by floor area, storeys, use and controls

Projects with their own pages: sector, location, year and scope

A section for each sector you serve, with a projects-completed figure you set

A services page with your four services and a numbered FAQ

Your phone, email and hours on every page

hvacventilationcommercial-hvacmechanical-contractorkitchen-extractlocal-businesstradesquote-calculatororangedark

Questions about Plenum

How does the estimate panel work?

Visitors pick a type of building and a type of system and slide the floor area; the total updates as they go. The Request this estimate button opens the request form on the Free estimate page with that total filled in. The Free estimate page also has a fuller calculator that prices by floor area, storeys, how the space is used, heat recovery and controls, and fills the same form. Every price is one you set, from the editor or by asking your AI agent.

Can I show the buildings I have worked on?

Yes. Projects are a collection: each has a photo, a sector, a location, a year, a scope and a short story, and gets its own page. The home page shows the first six; the Projects page shows them all.

Who is Plenum for?

Plenum is built for a commercial ventilation contractor working in factories, restaurant kitchens, schools and clinics, a mechanical subcontractor whose buyers are facilities and operations managers and a kitchen extract and canopy installer that also cleans and certifies ductwork. Not built for household plumber fixing leaks, drains and water heaters — try Flange instead.

What pages come with Plenum?

7 pages, already written and laid out: Home, Our services, About us, Projects, Journal, Free estimate and Contact. Add, rename or remove pages whenever you like.

Can Claude or ChatGPT build my site from Plenum?

Yes. Connect Sitelas to your AI agent and ask for a site that uses Plenum. It fills in your details, sends you a preview link, and publishes when you approve. The same chat can keep running the site afterwards.

Can I change Plenum without code?

Yes. Click any text, photo or colour to change it in the visual editor, or ask your AI agent to make the change. Nothing is locked.

What does it cost?

Nothing to start, with no trial clock. A free site runs on a sitelas.com address; Pro is $9 a month per site ($90 a year) for your own domain, analytics and more room.

Can I use my own domain?

Yes, on Pro. Point your domain at the site and the SSL certificate is issued and renewed for you.

Make Plenum yours

It opens in the editor with every page already written. Change what you want, publish when it reads like you.

Free to use · No credit card required

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