An equal or approved furniture spec is what keeps a furniture bid competitive. It still names a product, but it describes the requirement by performance and dimension and lets another manufacturer propose an equal, which the architect or owner then accepts or rejects. Without that language, a spec sheet that names one product sends the whole project through that brand’s dealer, and every other brand has to arrive as a formal substitution request with the architect’s sign-off.
This guide is for the people who receive those specs: architects and designers, owners’ representatives and procurement staff. It covers how a spec gets locked to one brand, what approved-equal language does in a public bid, what a substitution package needs to be accepted, how to write a spec that several brands can answer, and when locking a brand in is the right decision.
How a single-brand spec gets written into your drawings
A furniture spec closes in two steps. First, a specific product goes onto the construction drawings. Then the spec sheet names it with no route for anything else. From that point, as our piece on why a hundred brands beat a single catalog explains, the project goes through that brand’s dealer, and an open-line counter-spec needs a formal substitution request and the architect’s sign-off.
The product on the drawings can come from the dealer who helped during design. A major-line dealer works under an agreement with a sales quota: it commits to specifying a share of every project from its manufacturer’s catalog, as our explainer on the dealer model sets out. Its recommendations are shaped partly by your project and partly by that commitment, so the products it proposes come from that one catalog.
Designers feel the cost of that directly. When one catalog has to furnish a whole project, its strongest products carry the rooms they suit and the rest arrive as compromises, such as the chair that is nearly right or the table that is a little off in size. Our guide for architects and designers calls it a slow erosion of intent.
The details finish the job. A spec written around one manufacturer’s proprietary dimensions will either fail review or produce a single bid, and in public work a single bid is usually the worse of the two.
What ‘equal or approved’ legally means in a public bid
In a public bid, approved-equal language is what turns a brand name into a reference rather than a requirement. Our public sector furniture guide sets out what an open bid needs: a specification written to performance and dimension, with approved-equal language, so more than one manufacturer can answer it, and a written sole-source justification for any item specified without an equal.
The rules that govern it are your own. Your policy, charter or state law decides which purchasing routes you may use, and the dollar thresholds that separate quotes from a formal bid vary by state. Confirm them with your procurement office before the solicitation goes out.
Two practical consequences follow. From drafting the solicitation to a signed award, a formal furniture bid commonly runs six to twelve weeks, and that window has to close before the furniture lead time even starts. And bids and awards are public record, so every decision to accept or reject a substitute should be one you could explain to a resident or a reporter.
Getting the balance right is harder than it sounds. As our cooperative purchasing guide notes, a furniture bid written too tightly draws a protest, and one written too loosely draws bids on product that will not hold up.
Building a substitution package that won’t get rejected
A substitution is a request, and the architect or owner keeps control of whether it is acceptable. The package has to make that decision easy. A generic claim that a product is comparable does not do that. A package that answers the requirement line by line does.
A package worth submitting includes:
- ›The exact model, options, surfaces and accessories proposed, with standard features separated from options.
- ›Every deviation from the basis of design, stated up front rather than left for the reviewer to find.
- ›Current test reports, certificates and warranty terms for the exact product and finish combination being quoted, not for the product line in general.
- ›Any certification the spec calls for, such as low-emitting furniture certification. A spec that states it gives the reviewer grounds to reject a substitute that arrives without it.
- ›Samples or a mock-up wherever a station carries real risk.
- ›A complete installed-scope comparison, so freight, installation and other trades are priced the same way on both sides.
Timing matters as much as content. Our biotech open-line guide puts the best entry point at programming or early basis-of-design review, before every product is locked. A later alternate is still possible, but only with enough time for technical review, contract checks, submittals, samples, pricing, approvals and ordering. A good alternate starts from the requirement and ends with configured and installed value, not with list price.
Spec language that keeps three brands alive to bid day
Write to performance and dimension rather than to a model number. Our municipal office furniture guide lists what that means in practice: name the standards, the sizes, the warranty term and the finishes you need, then let each bid answer with a product.
A few more habits keep the field open without loosening the spec:
- ›Put the proof obligation on the vendor, in writing, before award. A vendor who can produce test reports and certificates quickly has done the work before.
- ›Ask for itemised pricing rather than a lump sum, with a clear scope, so an alternate can be compared line by line.
- ›Write required certifications into the spec rather than assuming every product will qualify.
- ›Ask each dealer which brands it is contractually obligated to specify, not just which brands it carries. Our RFP checklist explains why the second answer is the one that predicts your bid.
- ›Where you buy from a cooperative contract whose award was competed across a wide product range, you can usually describe what each piece has to do and how well, rather than trying to describe a product generically.
This is where an open line furniture dealer is useful in a way an aligned one cannot be. We have no quota to fill, so we have no reason to steer your document toward one manufacturer. When a specified product cannot arrive in time for the schedule, or its price breaks the budget, we can propose a real alternate from a different manufacturer with a comparable spec, which is more useful than a downgrade within one catalog. Asking whether a dealer will do that is one of the questions in our guide to reading an office furniture proposal.
When brand lock-in is genuinely the right call
Sometimes one brand is the right answer, and an honest dealer says so. Four situations come up.
- ›A corporate global agreement. If your company contracts one major manufacturer across all locations, the core specification is already decided. Open-line still helps with the ancillary product the agreement does not cover.
- ›A deliberate standards program. A multi-site standards program is a short written list of approved products for each function, with pricing agreed and a set way to order, so locking those products in is the point. The risk is a standard set so narrowly that a site with genuinely different needs goes around it.
- ›A category with no one-for-one alternate. Our healthcare dealer guide names modular clinical casework as one, where COI’s priority lines do not create a one-for-one substitute. The answer there is to keep the strongest basis-of-design decision in that category, bring in another qualified line only where one fits, and compete the rest of the project.
- ›Furniture you will keep reconfiguring. A bench or panel system from a line that stays in production can be re-stacked as headcount changes, so staying with the line you already own can matter more than the price of a different system.
In each case, lock the category that needs it and compete everything else. One locked decision does not have to hand the whole project to one dealer.
When should you bring a dealer into the spec?
Ideally during programming or early basis-of-design review, before every product is locked. That is when the spec can still be written to performance and dimension without reissuing anything. Bring us the drawings, the spec sheet or just the room list, and we will compare the specified products with alternates from our 100+ brands, side by side, before the document goes out. Our furniture specification service covers how that review works.
