HVAC Design, Installation & Project Delivery
From cooling load calculations to full building commissioning, We are your HVAC designer, contractor, and project manager, delivering reliable systems across Nigeria.
HVAC Designer & Project Manager
ASHRAE · HAP · CIOB · Google PM
HVAC Designers, Contractors & Project Managers
From Design to Commissioning, We Handle the Full Building Project
ByHolla Services delivers end-to-end HVAC and mechanical projects across Nigeria, from cooling load calculations, ductwork fabrication, and VRF/VRV multi-zone systems to chiller piping, kitchen extraction, cold storage rooms, and data-centre precision cooling. Our lead engineer is an ASHRAE member with certifications in HAP cooling load design, CIOB construction quality management, Google project management, and system commissioning, backed by 14+ years of hands-on design-build experience on real commercial projects.
Complete HVAC Services
Specialised services covering every cooling, heating, and air flow need for homes, offices, and mission-critical facilities.
Cooling Load Calculation & System Sizing
Get the exact AC capacity your space needs. No oversized waste, no undersized struggle, just perfectly balanced comfort and lower electricity bills.
Learn moreVRF / VRV & Central Air Conditioning Systems
Cool every room to its own temperature from one quiet, efficient system. Perfect for large homes, offices, and estates.
Learn moreCommercial & Server Room / Data Centre Cooling
Protect your equipment from heat failure with precision cooling built for 24/7 uptime. No downtime, no costly hardware replacements.
Learn moreAir Conditioning Installation
Enjoy years of quiet, efficient cooling with a clean, warranty-backed installation. No breakdowns, no water stains, no headaches.
Learn morePlumbing & General Technical Installations
One trusted team for HVAC and plumbing. No coordination headaches, no delays, no finger-pointing between contractors.
Learn moreRoutine AC Servicing & Maintenance Plans
Keep your AC efficient, clean, and reliable year-round. Lower electricity bills, fewer breakdowns, no surprise repair costs.
Learn moreAC Repair & Emergency Service
Get back to cool fast. Same-day repair that fixes the root cause, not just the symptom. No recurring breakdowns.
Learn moreKitchen Cooker Hoods & Extraction Systems
Keep your commercial kitchen safe and compliant with professional extraction systems that handle high heat, grease loads, and strict air quality standards.
Learn moreExtractor & Fresh Air Fans
Proper ventilation keeps indoor air healthy, removes odours, heat, and humidity, and meets building code requirements for homes and businesses.
Learn moreYour Comfort, Engineered to Last
Every project is designed, installed, and commissioned to deliver reliable cooling for years.
Certified HVAC Design
HAP-certified cooling load design means your system is sized right. No guesswork.
Full Design-Build
From load calculation to commissioning, one team owns the whole project. No finger-pointing.
Zero-Risk Estimates
Free, no-obligation estimates with honest upfront pricing.
14+ Years, 800+ Clients
Trusted by 800+ homes, offices, and data centres since 2012.
About ByHolla Services
Engineering You Can Trust, Comfort You Can Feel
ByHolla Services is an Air Conditioning, Plumbing installation and servicing outfit with Mechanical Engineering and Project Management training. As an ASHRAE member with certifications in HAP cooling load design, CIOB construction quality management, Google project management, and system commissioning, we deliver quality standards across all services. For over 14 years, we have served 800+ clients across Nigeria with reliable HVAC design, installation, maintenance, and general contracting.
Real HVAC Work Across Nigeria
CommercialCommercial Office Tower: Full Ductwork & VRF Installation
Complete ductwork fabrication and installation across multiple floors, with insulated supply runs, diffusers and a VRF system delivering zoned cooling for every office. The building now runs efficiently with concealed ductwork and precise temperature control.
CommercialMulti-Unit VRF Condenser Bank Installation
Outdoor VRF condenser bank installed on a commercial rooftop, serving multiple indoor zones from a central plant. The system delivers quiet, efficient cooling for an entire building complex.
CommercialRooftop Chiller Piping & Insulation System
Large-scale chiller piping network with professional insulation, supporting a central chilled-water system for a Lagos commercial facility. Properly insulated runs minimise energy loss and protect against condensation.
ResidentialFamily Home: Split-Unit Installation
The family enjoys quiet, efficient cooling in every room. Neat piping and drainage protect their walls and ceilings from water damage, and the units run reliably through every Lagos heatwave.
CommercialIkeja Commercial Building: Ceiling Ductwork & Cassette AC
Suspended ceiling with integrated insulated ductwork, cassette units and precision air distribution. A clean, professional finish that delivers even cooling without visible wall-mounted units.
CommercialVictoria Island Office: Linear Slot Diffuser Installation
Clean, architectural linear slot diffusers integrated into a premium office ceiling. Delivers even, draft-free air distribution across an open-plan workspace with a sleek, minimalist finish.
What Our Clients Say
Real, verified reviews from homes and businesses.
"They were very professional and courteous to me. I was attended to on time and they have integrity as well... I will highly recommend them."
Jumoke Ogunleye
Google Review
"They are wonderful! Very professional and not greedy. They have solid workers who are very courteous, patient and polite."
Nesvilla Glam
Local Guide · Google Review
"Set up a data centre some years ago and Biola handled the HVAC. It was a good job and professionally handled."
Ola Kolapo
Google Review
"ByHolla services has proven to be professional in rendering HVAC services in all the years of our contractual relationship. Bravo!"
Ike Alika
Google Review
"Always impressed by their quick response time, professionalism and follow up messages. I definitely recommend."
Adeleke Togun
Local Guide · 28 reviews
"ByHolla services is synonymous with global best practices in the built industry."
Bodunrin Oguntoye
Google Review
Serving Clients Across Nigeria
From Lagos to Abuja, Port Harcourt to Ogun and Oyo. Wherever your project is in Nigeria, our certified HVAC team can reach you.
Cool, Reliable Comfort Is One Message Away
From a single AC unit to a full building project, get a straight answer on WhatsApp, not a sales pitch.