HVAC Performance Monitor Kit with Arduino Uno + DHT22
Build an Energy-Saving HRV Controller with the HVAC Performance Monitor Kit (Arduino Uno + DHT22)
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
You’ll assemble a fully functional heat recovery ventilator controller that reads indoor and outdoor temperatures via three DS18B20 probes and humidity with a DHT22, then drives a fan through an L298N driver to maintain ideal fresh air exchange without wasting conditioned air. It’s a real‑world project for Indian homes tackling both stale air and rising energy costs — the same principle used in commercial HRV systems, now on your prototyping board.
What You'll Build
A smart HRV controller that automatically adjusts fan speed based on the temperature difference between inside and outside, avoiding cold drafts in winter or heat ingress in summer. The OLED shows real‑time readings and the DS3231 RTC timestamps every sensor sample. Perfect for balancing air quality and comfort during Delhi’s smoky winter or the coastal monsoon.
What You'll Learn
- Programming an Arduino Uno to read three DS18B20 sensors on a single OneWire bus with correct addressing
- Writing decision logic that uses indoor–outdoor differential and DHT22 humidity to decide fan duty cycle
- Integrating a DS3231 real‑time clock to timestamp sensor data for performance logging
- Driving a 12V DC fan with an L298N motor driver and implementing PWM speed control from sensor feedback
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| DS18B20 Probe | 3 |
| DHT22 | 1 |
| L298N Driver | 1 |
| DC Fan 12V | 1 |
| DS3231 RTC | 1 |
| 0.96in OLED | 1 |
| 4.7kΩ Resistors | 5 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| 12V Adapter | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Built for B.Tech ECE and EEE students tackling final‑year projects or Smart India Hackathon challenges around smart buildings and energy conservation. Also a strong fit for ATL Tinkering Lab mentors guiding advanced learners, and for CBSE Class 12 students who want a capstone electronics project that goes beyond blinking LEDs — this kit delivers a complete HVAC automation proof‑of‑concept.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code on the box to chat with the AI companion trained on this specific HVAC monitor project. If you still need help, our team is on WhatsApp within 6 hours to troubleshoot sensor wiring or fan control logic.
Can this monitor control an actual HRV unit in my home?
The kit builds a prototype controller on a breadboard/PCB using the included 12V fan. With proper isolation and an appropriate solid‑state relay, you can adapt it to drive a real heat recovery ventilator — the sensor logic and algorithm remain the same.
Do I need prior experience with HVAC systems?
No. The project teaches you the core thermodynamic principle (recuperating heat while exchanging air) step by step. You’ll understand how commercial HRVs work by building one yourself.
Can I extend this to log data to a cloud platform?
Absolutely. The Arduino Uno’s UART/I2C pins are free; you can add an ESP8266/ESP32 module to send temperature, humidity, and fan status data to ThingSpeak or Blynk — a popular add-on for hackathon dashboards.
HVAC — DS18B20 probes inside and outside control HRV fan speed to maintain ideal fresh air exchange without heat loss.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items