Case Study #6

czystepro.pl — Energy Audits & Subsidies with AI

SaaS for salespeople and energy auditors working with Poland's Clean Air and My Electricity 6.0 subsidy programs. ISO 13790 energy calculator, 6,197 ZUM-certified devices, PDF offers, auditor marketplace, and AI assistant — all in one PWA.

6,197 ZUM devices in database
ISO 13790 Calculation engine
PWA Works offline

Problem

Salespeople and auditors working with Poland's Clean Air program spend their days in the field — measuring buildings, calculating energy losses, and then manually entering data into Excel to generate offers in Word.

The program requires precise energy calculations based on PN-EN ISO 13790, and all devices must be from the official ZUM list (6,197 entries). Checking this manually takes hours and risks costly errors.

No central tool means: slow offers, audit mistakes, lost subsidies, and frustrated clients waiting weeks for documentation.

Solution

CzystePro guides salespeople and auditors from first client contact to subsidy application — in one tool.

1. ISO 13790 Energy Calculator

Two modes: Wizard (simplified pre-audit for salespeople) and PRO (full ISO 13790 audit with EU/EK/EP calculations, Glaser condensation analysis, WT 2021 compliance). Result: a complete building energy performance certificate.

2. ZUM Device Database (6,197 entries)

The entire official ZUM list integrated into the platform. Salespeople select heat pumps, windows, or insulation — the system automatically verifies subsidy eligibility. Zero manual checking.

3. Heating System Comparator

Clients see a side-by-side comparison of 3 systems (e.g., heat pump vs gas vs coal) with annual costs, ROI, and subsidy impact. Helps close the sale in 15 minutes instead of a week.

4. PDF Offer Generator

Clean Air and My Electricity 6.0 offers — with subsidy calculations, device lists, and cost estimates. Generated with one click, ready for the subsidy office.

5. AI Assistant (Gemini)

A chatbot that knows the regulations, building codes, and subsidy program details. A salesperson asks: "What subsidy for a heat pump in a 120m² house in climate zone III?" — the AI responds with specific amounts and conditions.

6. Auditor Marketplace

A panel connecting salespeople (who acquire clients) with certified energy auditors (who perform full audits). Order management, status tracking, and GDPR-compliant consent flows.

Before vs After

❌ Before
Energy calculations: Excel + calculator
ZUM list check: manually on IOS website
Generating offers: Word + 2-3 hours
Subsidy knowledge: quarterly training
✅ With CzystePro
Energy calculations: ISO 13790 in 5 min
ZUM list check: auto-verification
Generating offers: 1 click (PDF)
Subsidy knowledge: AI assistant 24/7

Results

6,197
ZUM devices in database
5 min
Pre-audit instead of 3h
2
Subsidy programs (CP + MP)
PWA
Works offline in the field

Instead of calculating in Excel and searching devices on the ZUM website, I complete an entire pre-audit in 5 minutes on my phone. The client gets a PDF offer right away — before competitors can even call back. CzystePro changed the way I work.

Tomasz K.
Renewable Energy Salesperson, Clean Air program · Greater Poland

Tech Stack

Next.js 15 React TypeScript Supabase Google Gemini Stripe PWA ISO 13790 Vercel

Why this stack?

Timeline

Week 1-2 Research subsidy programs (CP + MP 6.0), ISO 13790 norms analysis, multi-tenant architecture, UI design
Week 3-4 Energy calculation engine (EU/EK/EP), ZUM database import (6,197 devices), pre-audit wizard for salespeople
Week 5-6 PDF offer generator (CP + MP), heating comparator, ROI calculator, Stripe integration
Week 7-8 Gemini AI assistant, auditor marketplace, PWA + offline, landing pages, SEO blog (13 articles), production deploy
3 open slots remaining this week

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