Made for the PRO

T Series Equipment Interface Module

What is a EIM?

In short, the Equipment Interface Module bridges the gap between thermostat and heating system. The thermostat communicates with the EIM, in turn allowing it to control the boiler, heat pump or zone valve functions that make up the heating system in the home.

Simplifying the installation experience

A front opening system that allows for an easy installation experience of the Equipment Interface Module and access in restrictive spaces, saving the Pro time and money. With clear labeling, the swivel wiring terminal platform caters for varying wire sizes and install scenarios whilst maximizing space and flexibility during the entire wiring process.
Design validated over 8 rounds of OVOC field testing by 60 contractors prior to launch, resulting in a consistent 4.5 star user experience rating by the industry. In some cases installers have said they would install the T Series over the competition purely down to the EIM installation alone. Industry validation of the improvements made to the installation process.

Understanding The Installation Problems

Various installation scenarios

Installations in the home vary depending on country, the age of the home walls, environment, retro fit or new installation and access to wires. All have unique benefits and problems.

Current Solution User Experience Heuristic Review

Honeywell BDR91 Equipment Interface Module

A heuristic review was undertaken on the current EIM solution, which had been on the market for over a decade. Liked by the installer but not without it's limitations and pain points.. • Compact design was a benefit in tight cramped spaces but openings lacked room for wiring, difficulty in manipulating wires into terminal blocks.• Risk of cutting cables due to small space between wall box and EIM.• Limited room for excess cable to move and be packed into making the main component difficult to clip back on and press in connector pins. Too much cable and it pops back off or to don't have pins fully inserted leading to malfunctions in operation.• Limited flexibility for different heating applications and future expansion.• Does not cover sufficiently the different wall junction box types used throughout Europe, not a one solution fits all.

Iterative Development and Testing

Industrial design & User Experience Heuristic Testing:• Numerous concepts were designed and tested to ensure best outcome and flexibility for the installation experience.

The Solution

The variety of installation scenarios, standards and wiring gauges across the EU had to be understood and catered for. A functional, flexible and future proof solution that puts the needs of installers first, eliminating errors and saving time on the job.

Wiring Flexibility

Backplate screw hole flexibility

Installation and Screw Fixation Flexibility

The Honeywell EIM can be used as part of a single (1 Thermostat) or duel (2 thermostat) zone smart heating solution to control your home comfort .

Project date, 2014-2016

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