SOLID STATE RELAYS
UNDERSTANDING SOLID STATE RELAYS (SSR) IN HVAC SYSTEMS
In HVAC systems, a solid-state relay (SSR) is an electronic switching device that uses semiconductors like transistors or thyristors to control high-power loads such as motors or heaters with a low-voltage control signal. Unlike traditional electromechanical relays, SSRs offer faster switching, longer lifespan, and no moving parts.
Solid-state relays do not have mechanical components like coils or plungers. They operate using transistors, resulting in quicker switching times and reduced maintenance costs.
How It Works
A low-voltage control signal activates the semiconductor inside the SSR, allowing current to flow through the load. When the control signal stops, the load turns off.
SSRs are effective for controlling fan speeds in HVAC systems, helping improve energy efficiency by regulating air handling.
Recommended SSR manufacturers in India include Schneider, Unison, and Hindustan Electronic.
Our Range of Services
- Chiller Installation
- Chiller Routine Inspections
- Chiller Services & Descaling
- Compressor Winding
- Mechanical Repairs
- Electrical Rectifications
- Pump & VFD Repairs
- Pressure Testing & Gas Charging
- AMC & CAMC Contracts
- Preventive Coatings
- Audits, Certifications, and more
Why Choose Us ?
- 25 years of experience
- Skilled technical team
- Staff trained by Carrier / York
- Quality-assured services
- Quick response times
- 24/7 emergency services
- Transparent communication
- Cost-effective solutions
- Competitive pricing
- Customer-focused approach
- Flexible scheduling options
- Warranty and guarantee offers
Frequently Asked Questions
Who is Compress India, and what sets you apart?▼
Compress India has grown from humble beginnings into a respected leader in industrial HVAC and customized cooling solutions. With over 30 years of experience, we deliver turnkey systems, chillers, and bespoke services across diverse industries, underpinned by innovation, customer satisfaction, and trust.
What industries do you serve?▼
We’re proud to serve a wide range of sectors, including pharmaceuticals, healthcare, IT, telecommunications, logistics, warehousing, steel, textiles, chemicals, food processing, finance, and educational institutions—tailoring solutions to meet each industry's unique needs.
What services do you provide?▼
We offer end-to-end HVAC services, including system design, installation, turnkey project execution, chiller and VRV/VRF system solutions, ducting, fabrication, automation, electrical works, and industrial refrigeration. Whether it’s a small requirement or a large-scale project, we deliver reliable, energy-efficient, and cost-effective solutions.
Do you provide customized HVAC solutions?▼
Yes. Every client has different needs, and we specialize in offering tailored services—ranging from inspection and preventive maintenance to upgrades like insulation replacement, motor servicing, and specialized fabrication. Our customized approach ensures you get solutions that truly fit your operations.
What common AC problems do you address?▼
We handle issues like water leakage (caused by clogged drains or trays), poor airflow (due to dirty filters or fan faults), and cooling failures (caused by refrigerant leaks, outdoor unit problems, or electrical issues). Our expert technicians ensure quick, lasting fixes for all major and minor problems.
How can I reduce AC energy consumption?▼
We recommend regular servicing, using the timer function, keeping rooms sealed, and setting the temperature to 24 °C for maximum efficiency. Upgrading to inverter ACs with higher star ratings is also an effective long-term solution for reducing energy bills.
What is the lifespan of an AC system?▼
On average, centralized HVAC systems last 10–15 years, while room or split AC units run efficiently for 3–6 years under normal daily usage. With regular servicing and proper care, their lifespan can be extended.
How do you ensure quality in your HVAC projects?▼
Every project we undertake goes through strict quality checks at every stage—right from design to installation and maintenance. We use trusted brands, follow industry standards, and our team of skilled engineers ensures that the systems are safe, reliable, and long-lasting.
Do you provide consultation before starting a project?▼
Yes. We believe every client has unique requirements, so we offer detailed consultation and site inspections before starting any project. This helps us understand your needs better and design a solution that balances performance, cost-efficiency, and sustainability.
Can businesses upgrade their existing HVAC systems with you?▼
Absolutely. We specialize in retrofitting and upgrading older HVAC systems with the latest technology. Whether it’s energy-efficient chillers, modern ducting, or smart automation, we help businesses transition to advanced systems without disrupting ongoing operations.