ISH 2027
Frankfurt am Main.

What ISH is, in two lines

ISH is the world’s leading trade fair for the HVAC + Water sector: heating, ventilation, air conditioning, bathroom and water technology, renewables and energy efficiency. It is organized by Messe Frankfurt, runs on a two-year cycle (odd years) and, in the 2025 edition, brought together 2.183 exhibitors from 54 nations (72% from abroad) and 163.157 visitors from 150 countries, across roughly 275.000 m² of exhibition space. Since 2025 the layout has been oriented toward applied solutions and sustainability, organized by thematic fields: bathroom, plumbing systems, installation, heat generation, indoor air quality, smart building management and software.

It is not a showcase-only fair: it is the point where installers, designers, architects, wholesalers and property managers choose the suppliers for the building sites and tenders of the coming months. The real purchase decisions close in the weeks after the event, when the prospect compares the options seen at the fair against the quote. That is why, at ISH, lead management counts just as much as the stand presence.

What to exhibit, where to exhibit

The definitive 2027 floor plan is not yet published, but ISH’s thematic structure is well established and revolves around two large worlds:

• ISH Water / World of Installation Technology — spread across Hall 3, 4, 5, 6 and the Festhalle: bathroom technology, plumbing systems, installation technology, fittings, water management
• ISH Energy — the full spectrum of building technology: heat generation (heat pumps, hybrid boilers, solar thermal), indoor air quality, ventilation and smart building management

Hall 5, opened in 2023, is the pivot of the new thematic structure and one of the busiest crossing points of the grounds.

The product segment is clear: on one side the water and bathroom world (sanitary ware, fittings, plumbing systems, installation), on the other the energy technology for the building (heating, renewables, climate control, building automation). All under the umbrella of building and construction: ISH is, in effect, the fair where building technology meets the people who design and build the buildings.

A practical positioning tip: choose the hall based on who decides on your product. If you sell sanitary ware, fittings or plumbing systems, space in the Water-area halls puts you in front of installers and designers who evaluate specifications and finishes. If you sell heat pumps, heat generation or building automation, ISH Energy is where the technical specifiers and the large energy-efficiency buyers pass through. In both cases, gear up for the strong international component (72% of exhibitors and visitors from 150 countries): conversations and leads in English are the norm, not the exception.

Visitor profile

The ISH audience is highly professional and strongly international: visitors from 150 countries, an audience that arrives with a building site, a specification or a tender to close, not out of curiosity. In practice you can expect:

• Plumbing and heating installers (SHK) (~25-30%) — the heart of the fair: owners of installation firms and technicians who choose brands and systems for their building sites
• Designers, engineers and building-services consultancies (~20%) — specifiers who validate technologies, draft specifications and steer the spend
• Architects and the construction/building sector (~15%) — those who integrate building technology into the project, from residential to commercial
• Industry and trade wholesale of the sector (~15%) — wholesalers and distributors who select catalogues and supply agreements
• Property managers and facility management (~10-15%) — managers who evaluate energy retrofits, maintenance and system replacement
• Manufacturers and distributors of building technologies (~10%) — operators looking for partners, OEM and channel agreements

The decision-making profile is high: many visitors are senior, with direct spending power (installers, owners) or a specifying role (designers, architects). The international component is massive: distinguish right away the local German buyers of the SHK segment from the large international groups and the specifiers, because the timing and decision cycle are very different.

How to prepare in the 4 weeks before the event

Week -4 → Messaging audit

Check that your value proposition answers the three questions every ISH operator asks themselves in the first 30 seconds at the stand:

1. What you do, in one sentence (e.g. “air-to-water heat pumps for residential retrofits up to 16 kW”)
2. For whom, a precise segment (e.g. “SHK installers and building-services consultancies in Central Europe”)
3. What changes, a measurable benefit (seasonal performance, energy class, installation time, regulatory compliance, running costs)

No endless slides. One clear sentence, repeated by every person on the team in English too, because here half the buyers speak neither Italian nor German.

Week -3 → Stand operation playbook

Define who does what over the five days:

• Who staffs the stand and welcomes the flow (at an event with 163,000 visitors the staffing can never lapse)
• Who handles the product demos (a system that is better understood “in operation” requires a dedicated person)
• Who is in the back office (HQ) to do live follow-up already during the event
• Who is the point of contact for foreign buyers and international delegations

ISH lasts five days: without shift rotations the quality of conversations collapses in the afternoon. With a team of more than 4 people, organize time slots and set appointments in advance with the key prospects (designers and large wholesalers plan their visit weeks ahead).

Week -2 → Qualification form

Every contact collected at the fair must be qualified on the spot, not “later”. The critical questions are only 3:

1. Timing, when do you have the building site / the investment / the tender? (Q1/Q2/Q3/Q4/don’t know)
2. Budget, is there already a spending line or a specification that binds you?
3. Decision, who decides — the installer chooses the brand, but often the designer specifies and the client signs. How many people are involved?

Everything else (geographic area, company size, type of buildings handled) can be found in the public data sources that good automatic enrichment covers, without your having to ask for it at the fair.

Week -1 → CRM integrations

The classic mistake: contacts collected on paper or in the fair app, photos of business cards, and then nobody puts them into the CRM. The follow-up starts too late, when the prospect has already spoken with your competitors — perhaps in the hall next door, since at ISH direct competitors are often in the same thematic hall.

Configure the system so that every badge or card scan, at the fair, lands already in the company CRM, with an event tag + qualification answers + a voice note from the salesperson. Not in an Excel sheet, not in a Google sheet “that we’ll sort out on Monday”.

Is the official ISH app worth it?

Yes, there is an official app: ISH Navigator, published by Messe Frankfurt and available on the App Store and Google Play. It does well what it is designed for, namely visitor navigation and orientation:

• Search exhibitors and products with filters
• Interactive floor plan of the exhibition grounds with stand detail
• Quick finder for favourites
• Calendar and watchlist of the event’s activities

It is an excellent tool for those who visit. But it is important to be honest about what the app does NOT do, which is why it does not replace a lead capture system for those who exhibit:

• It does not integrate with your company CRM (HubSpot, Salesforce, Pipedrive). The contacts stay in the app.
• It does not automatically enrich data. If from the card you only have name + company, you keep just that.
• It does not send follow-ups to the prospect. You have to do that yourself, manually, afterwards.
• It does not generate an executive report on stand performance. At most it gives you a basic export.
• It changes (and is renewed) at every edition: the workflow has no continuity from one fair to the next.

At an event with these numbers — 163,000 visitors in five days, many contacts collected via business card between the halls — you need a tool that digitizes and routes the contact into the commercial workflow fair → CRM → follow-up. It is exactly the pattern that Linkly runs with its 6 AI agents (capture, enrichment, qualification, routing, follow-up, report): see how Linkly works.

What to do during the 5 days of the fair

Day 1 (Monday) → opening and calibration

• Team briefing in the morning: review the 3 messages and the roles (staffing / demo / back office)
• Calibration: the first 10-15 leads of the day serve to tune the qualification questions
• The opening is more orderly: use it for the more technical conversations with designers and specifiers
• At the end of the day, a first debrief: what is working, what to fix tomorrow

Day 2 (Tuesday) → traffic rises

The flow grows noticeably. The first international delegations and the buyers from industry and wholesale arrive. Keep a senior person always present and schedule the product demos here: many strategic prospects plan their visit in the first days.

Day 3 (Wednesday) → the decision-making core

Typically the day of heaviest traffic and the highest concentration of senior buyers, large wholesalers and specifiers. It is the moment to dig into the hot leads of the first two days, set stand appointments and keep the pace on qualification: every contact, already in the CRM with timing/budget/decision.

Day 4 (Thursday) → high quality, traffic still strong

Traffic still high but more manageable. An ideal day for the long technical conversations and for taking prospects to the demos without a queue. Recover the leads you didn’t have time to qualify thoroughly on Wednesday.

Day 5 (Friday) → closing, lighter but targeted traffic

A drop in traffic, but it is the right moment to:

• Close appointments with the hot leads of the previous days
• Have more in-depth conversations (quieter stands)
• Tour the competitors: see who came and what they showed, take cues for the next edition

What to do in the 7 days after the fair

Speed-to-lead is the factor that separates those who monetize the fair from those who file it away. Companies that contact leads within 24-48 hours convert far more than those who start one or two weeks later. At ISH, where the purchase cycle in building is long and tied to the timing of the building site, recovering even just a few days is worth a lot: the prospect is already comparing the quotes.

The winning follow-up playbook:

1. Within 24h, a personalized email to every qualified lead with timing/budget/decision. No template: a reference to something specific said at the stand (the system seen, the building site mentioned, the specification discussed).
2. Within 7 days, the assignment of a referent salesperson for every qualified lead. One specific scheduled touchpoint (call, demo on site, site visit), not a mass email.
3. Within 14 days, deliver on the promises made at the stand (technical data sheet, quotation, product availability). Automatically extractable from the salesperson’s voice notes if the system has recorded them.
4. Within 30 days, an executive report on performance vs target, breakdown by salesperson, segment and country, estimated pipeline. To use when asking management to renew the event budget.

Practical FAQs

How much does it cost to exhibit at ISH?

Costs are not published in standard form and vary widely depending on the thematic hall, floor area, position and fit-out. As a purely indicative order of magnitude for a five-day presence at a German fair of this scale: the exhibition space at Messe Frankfurt starts at several tens of euros per m² for the base fee, on top of which come fit-out, technical services, staff, travel and logistics. For a medium-sized stand you easily reach five-figure sums. The real numbers must be requested directly from Messe Frankfurt: they depend too much on the type of stand and the thematic area.

Which is the best day for the most strategic contacts?

Wednesday is typically the day of heaviest traffic, with the greatest concentration of senior buyers, large wholesalers and specifiers. Monday is more orderly and ideal for the long technical conversations; Friday sees traffic drop but remains useful for closing the hot appointments. Plan the presence of the senior team above all in the central span.

When does visitor registration open?

Generally in the months before the event, with tickets purchasable online on the official site. Early registration is the fastest way to get the badge and avoid the queues; check dates and procedures directly there, because they can vary from edition to edition.

ISH is biennial: are the 2027 dates certain?

ISH runs on a two-year cycle in odd years. The 2025 edition took place in March with 2.183 exhibitors and 163.157 visitors; the next confirmed edition is ISH 2027, from 15 to 19 March 2027 at Messe Frankfurt. The dates are confirmed by the official site, but it is always advisable to re-check them close to the event.

What alternative to paper for collecting contacts?

The stack of business cards collected between the halls is the worst option: time to digitize, transcription errors, lost leads. Three practical alternatives:

1. Official fair app (ISH Navigator), excellent for navigation, but disconnected from your CRM (see section above).
2. CRM with native mobile scanning (HubSpot, Salesforce have dedicated features), works if the team knows how to use them. Often it doesn’t know how to use them with hands full, in a crowded stand.
3. A dedicated lead capture system + AI agents for enrichment, qualification and follow-up, the pattern that Linkly runs. See how Linkly works.

Page updated ahead of the 2027 edition. The quantitative figures cited refer to the 2025 edition (the most recent held); the 2027 targets are to be verified on the official site. For official information and exhibitor/visitor registration, refer to the site ish.messefrankfurt.com.