Pre-Construction HVAC
Built Right From the Ground Up
A well-planned mechanical system supports comfort, efficiency, and a smoother build from day one. Global Comfort Air works with builders, renovators, and homeowners on complete HVAC planning and installation for new homes, additions, and commercial projects across the GTA.
Pre-Construction HVAC Services
HVAC System Design
Manual J load calculations, duct design, and equipment selection for new construction. We design systems that meet Ontario Building Code and ENERGY STAR® new home requirements.
Mechanical Rough-In
Complete ductwork, gas piping, and refrigerant line rough-in during the framing stage. We coordinate with your builder to meet construction schedules without delays.
Equipment Installation
Installation of furnaces, air conditioners, heat pumps, HRVs, and air handlers at the appropriate construction stage with full commissioning and testing.
HRV/ERV Installation
Heat Recovery Ventilator installation — required by Ontario Building Code for new construction. Provides fresh air while recovering heat energy from exhaust air.
Gas Rough-In
Gas piping rough-in for all appliances including furnace, water heater, stove, fireplace, and BBQ hookup. Fully permitted and inspected by TSSA.
Builder Partnerships
We work with residential and commercial builders throughout the GTA as a trusted HVAC subcontractor. Competitive pricing, reliable scheduling, and quality workmanship on every project.
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The Right Approach
Why Early HVAC Planning Matters
The mechanical system is one of the most complex and consequential elements of any new home. Decisions made during the design phase — equipment selection, duct routing, equipment room sizing, and ventilation strategy — have a direct impact on comfort, efficiency, and operating costs for the life of the building.
Involving your HVAC contractor early in the process allows for optimized duct routing that minimizes pressure losses, properly sized equipment rooms, and a ventilation strategy that meets code while maximizing indoor air quality. Changes made after framing is complete are significantly more expensive and often result in compromises.
Ontario Building Code Requirement
Heat Recovery Ventilators (HRV)
Ontario Building Code requires HRV installation in all new residential construction. As HRV specialists, we design and install systems that meet code requirements while maximizing fresh air delivery and energy recovery.
Energy Recovery
HRVs recover 70–80% of the heat energy from exhaust air, dramatically reducing the energy cost of ventilation in cold climates.
Fresh Air Delivery
Continuous fresh air supply to bedrooms and living areas — eliminating stale air, excess CO₂, and indoor pollutants without opening windows.
Moisture Control
Proper ventilation removes excess moisture from cooking, bathing, and occupancy — preventing condensation, mould, and structural damage.
Code Compliance
All HRV installations are designed and installed to meet Ontario Building Code Section 9.32 ventilation requirements and ASHRAE 62.2 standards.
From Blueprint to Commissioning
Our Pre-Construction HVAC Process
Design Consultation
We review your architectural plans, discuss your comfort goals and budget, and perform Manual J load calculations to determine the optimal system configuration for your new home.
System Design & Permitting
We produce a complete HVAC design including duct layout, equipment specifications, and HRV/ventilation plan. We apply for all required mechanical permits before work begins.
Rough-In Stage
During framing, we install all ductwork, gas piping, refrigerant lines, and HRV ducting. We coordinate with your builder and other trades to maintain the construction schedule.
Equipment Installation & Commissioning
After drywall, we install all equipment, make final connections, and commission the complete system — including balancing, thermostat programming, and HRV calibration.
Builder Partnerships
A Trusted HVAC Partner for GTA Builders
We work with residential and commercial builders throughout the Greater Toronto Area as a reliable HVAC subcontractor. Our team understands construction schedules, trade coordination, and the importance of getting it right the first time. We offer competitive pricing, consistent quality, and the accountability that comes with over 27 years in the GTA market.
Our Pre-Construction Advantage
Why Builders and Homeowners Choose Us
Manual J Certified Design
Every new construction project begins with a proper Manual J load calculation — the industry standard for accurate equipment sizing. We never guess at system size.
Ontario Building Code Expertise
Our team is thoroughly familiar with Ontario Building Code mechanical requirements, ENERGY STAR® new home standards, and local building department expectations across the GTA.
Single-Source Accountability
We handle the complete mechanical scope — HVAC design, ductwork, gas piping, HRV, and equipment installation — under a single contract with one point of accountability.
Construction Schedule Reliability
We understand that delays in one trade affect all others. Our pre-construction team is committed to meeting rough-in and installation milestones to keep your project on schedule.
Ready to Get Started?
Contact us today for a free estimate. Our licensed technicians are available 24/7 for emergency service across the GTA.
Serving Peel · Toronto · York · Halton · Durham · Barrie
Frequently Asked Questions
When should I involve an HVAC contractor in new construction?
As early as possible — ideally during the design phase. Early involvement allows us to optimize duct routing, equipment placement, and system design before walls are closed. This saves money and ensures better results.
Is an HRV required in new Ontario homes?
Yes — Ontario Building Code requires Heat Recovery Ventilators (HRVs) in all new residential construction. HRVs provide fresh air ventilation while recovering heat from exhaust air, improving both air quality and efficiency.
What is a Manual J load calculation?
Manual J is the industry-standard method for calculating a home's heating and cooling loads based on insulation, windows, orientation, and climate. Proper load calculations ensure your HVAC system is correctly sized — not too big, not too small.
Can you work with our builder?
Absolutely. We regularly work as HVAC subcontractors for residential and commercial builders across the GTA. We're experienced in coordinating with other trades and meeting construction schedules.
Do you handle permits for new construction HVAC?
Yes — we manage all required mechanical permits and coordinate inspections with the local building department. All our work is fully permitted and code-compliant.
Why Choose Global Comfort Air?
Serving the Greater Toronto Area since 1999, we bring factory-trained expertise, premium Lennox equipment, and a commitment to your complete satisfaction on every job.
- Manual J load calculations for proper system sizing
- Ontario Building Code compliant design
- ENERGY STAR® new home program experience
- HRV/ERV specialists — required for new builds
- Coordination with builders and other trades
- Lennox equipment with full manufacturer warranty
- Permit and inspection management
- Residential and commercial new construction
Pre-Construction HVAC Service Area — Greater Toronto Area & Beyond