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Free guides & eBooks for your projects.

Practical, no-cost resources written by APIS engineers — playbooks, checklists and feasibility guides on energy, HVAC-R, solar, smart buildings, ESG and lifecycle delivery. Pick what's useful, tell us where to send it, and it's yours.

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Resources you can put to work this week.

Each download is a focused, field-tested resource — no sales fluff. We email it to you instantly, and only send more if you ask us to.

APIS Guide

The Building Energy Audit Playbook

PDF · 24 pages
Energy & ESCO

A step-by-step method to uncover 20–40% in energy savings before you spend on new equipment.

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APIS Guide

Solar PV for Commercial Buildings

Feasibility guide · PDF
Solar & Renewables

Sizing, ROI and grid-connection essentials for rooftop and ground-mount PV across the Western Balkans.

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APIS Guide

HVAC-R Lifecycle Costing

Decision guide · PDF
HVAC-R

A CapEx-vs-OpEx framework to weigh retrofit, replacement and refrigerant-transition options.

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APIS Guide

The Smart Building Readiness Checklist

Checklist · 40 points
Smart & Automation

Assess your building's digital maturity across BMS, metering, connectivity and controls.

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APIS Guide

EU Taxonomy & ESG for Property Owners

eBook · PDF
Sustainability

What environmental alignment actually requires for new-build and retrofit projects, in plain terms.

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APIS Guide

EV Charging Infrastructure Planning

Planning guide · PDF
EV Charging

Load assessment, standards and futureproofing to scope charging for car parks, fleets and sites.

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