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The Complete Guide to Commercial HVAC in Calgary: Reznor Heating Systems Explained Choosing the right commercial HVAC system for your Calgary facility is one of the most significant decisions you’ll make as a building owner or facility manager. The wrong choice means higher energy costs, uncomfortable employees, code violations, and premature equipment failure. The right choice means reliable warmth through Calgary’s harshest winters, improved indoor air quality, and years of trouble-free operation. At NextAir.ca, we specialize in complete commercial HVAC solutions for Calgary businesses — from single unit heater installations to complex, multi-system mechanical projects. This guide gives you a comprehensive overview of the key heating systems we supply and install, and helps you understand which solution is right for your facility. Understanding Calgary’s Commercial HVAC Requirements Calgary presents unique challenges for commercial HVAC system design: Extreme winter temperatures regularly reaching -30°C to -40°C with wind chill require heating systems with substantial reserve capacity Chinook wind events create rapid temperature swings that demand responsive, modulating heating equipment Wildfire smoke from B.C. and northern Alberta increasingly affects Calgary air quality, requiring filtration upgrades Alberta’s Energy Efficiency Act and National Building Code requirements govern minimum equipment efficiency standards Natural gas is the dominant heating fuel in Calgary, with an extensive distribution network serving most commercial and industrial areas Reznor Heating Products: NextAir’s Core Commercial Offering NextAir is an authorized supplier and installer of Reznor commercial heating products. Here’s a quick overview of the four main product lines and their ideal applications in Calgary: 1. Reznor Unit Heaters — Fast, Powerful Forced-Air Heating Reznor unit heaters are the most widely installed commercial heating solution in Calgary warehouses, garages, and industrial facilities. They deliver rapid heat using a gas burner and integrated fan, making them ideal for large, enclosed spaces where fast warm-up is a priority. Available in capacities from small shop heaters to large industrial units serving hundreds of thousands of cubic feet. Related: Reznor Unit Heaters Calgary — Industrial & Warehouse Heating | NextAir 2. Reznor Tube Heaters — Efficient Infrared Radiant Heating For facilities with high air infiltration — loading docks, aircraft hangars, automotive service bays — Reznor tube heaters provide radiant infrared warmth that isn’t wasted when doors open. They heat people, floors, and equipment directly, making them 30–50% more efficient than unit heaters in high-infiltration environments. An essential consideration for any Calgary facility with frequent large-door operation. Related: Reznor Tube Heaters Calgary — Radiant Infrared Heating | NextAir 3. Reznor Makeup Air Units — Code-Compliant Fresh Air Solutions Wherever your Calgary facility exhausts large volumes of air — from commercial kitchen hoods, spray booths, welding exhaust, or industrial ventilation — a makeup air unit is required to maintain safe building pressure and provide heated fresh air replacement. Reznor’s MUA lineup covers everything from small restaurant makeup air to large industrial replacement air systems. Related: Reznor Makeup Air Units Calgary — MUA Supply & Install | NextAir 4. Commercial Rooftop Units — All-in-One Heating, Cooling & Ventilation For Calgary commercial buildings that require both heating and air conditioning — offices, retail, healthcare facilities, schools — commercial rooftop units provide a complete, packaged solution. Modern RTUs offer significantly higher efficiency than older units and integrate seamlessly with building automation systems for optimal energy management.  Related: Rooftop Units Calgary — Commercial HVAC Solutions | NextAir How to Choose the Right System for Your Calgary Facility The right commercial HVAC solution depends on several factors. Use this quick reference to start your planning: Facility Type Recommended System Key Benefit NextAir Solution Warehouse / Distribution Unit Heater + Tube Heater Fast heat + dock door efficiency Reznor UDAP + CODF Auto Service / Body Shop Tube Heater + MUA Radiant comfort + code compliance Reznor Radiant + MUA Office / Retail Building Rooftop Unit (RTU) Heat & cool in one package Commercial RTU Commercial Kitchen MUA + Supplemental Heat Exhaust replacement + comfort Reznor MUA Aircraft Hangar Tube Heater Array Massive space, door tolerance Reznor CODF Series Manufacturing Plant Unit Heater + MUA Process heat + ventilation Reznor UDAS + MUA NextAir’s Commercial HVAC Process: From Assessment to Commissioning Discovery & Site Assessment: We visit your Calgary facility to understand your heating, ventilation, and air conditioning needs, existing infrastructure, and budget parameters. Engineering & System Design: Our team produces a complete mechanical design including equipment selection, ductwork layout, gas piping sizing, electrical load calculations, and controls specifications. Permit Application: We handle all Alberta Safety Codes and City of Calgary permit applications, ensuring your project proceeds without compliance delays. Equipment Supply: We source all Reznor and other specified equipment through our authorized distributor network, ensuring genuine products with full manufacturer warranties. Professional Installation: Our Red Seal journeymen and licensed gas fitters perform all installation work to Alberta code standards and manufacturer specifications. Commissioning & Handover: Every system is thoroughly tested, balanced, and commissioned before handover. We provide complete documentation and operator training. Ongoing Maintenance: NextAir offers annual and multi-year preventive maintenance contracts to protect your HVAC investment and maintain peak efficiency. Why Calgary Businesses Choose NextAir for Commercial HVAC Local Calgary expertise: We understand Alberta’s building codes, climate demands, and utility infrastructure. Reznor authorized: Direct access to Reznor products ensures genuine equipment and full warranty support. Complete project delivery: From engineering through commissioning, one team manages your entire project. Transparent pricing: Detailed, itemized proposals with no hidden costs. Emergency service: When your heating system fails in a Calgary winter, NextAir responds. Frequently Asked Questions — Commercial HVAC Calgary What areas around Calgary does NextAir service? NextAir provides commercial HVAC services across Calgary and the surrounding area including Airdrie, Chestermere, Cochrane, Okotoks, High River, Strathmore, and the Rocky View County industrial corridor. Can NextAir handle a multi-site commercial HVAC program? Yes. NextAir works with property management companies, retail chains, and industrial operators with multiple Calgary locations to provide consistent, coordinated HVAC supply and service programs. Does NextAir offer emergency HVAC service in Calgary? Yes. Equipment failures during Calgary winters can be dangerous and disruptive. NextAir

Rooftop Units in Calgary: Complete RTU Guide for Commercial & Industrial Buildings Commercial rooftop units (RTUs) are the backbone of heating and cooling for thousands of Calgary office buildings, retail centres, schools, and industrial facilities. They’re self-contained, located out of the occupied space, and designed to handle Calgary’s demanding heating and cooling requirements within a single, roof-mounted package. NextAir.ca is one of Calgary’s leading commercial HVAC contractors specializing in rooftop unit supply, installation, replacement, and preventive maintenance. This guide covers everything you need to know about RTUs in Calgary’s climate. What Is a Rooftop Unit (RTU)? A rooftop unit is a packaged HVAC system mounted on the roof of a commercial or industrial building. It houses all major components — gas-fired heat exchanger, DX cooling coil, compressor, condenser, supply fan, economizer, and controls — in a single weatherproof cabinet. Ductwork connects the unit to the interior space below. RTUs are the preferred heating and cooling solution for: Single-story and low-rise commercial buildings across Calgary Retail strip malls and big-box stores throughout the city Calgary office buildings and medical clinics Light industrial facilities requiring both heating and cooling Schools, recreational facilities, and municipal buildings Why RTUs Are Particularly Well-Suited for Calgary’s Climate Extreme Cold Performance Calgary’s winters regularly push temperatures below -30°C, and quality RTUs designed for Canadian climates include features like low-ambient kits that allow reliable cooling operation in shoulder seasons, enhanced heating capacity for cold-start conditions, and insulated cabinets that prevent heat loss and condensation in frigid temperatures. Chinook Adaptability Calgary’s famous chinook winds create rapid temperature swings — sometimes 20°C within hours. Modern RTUs with modulating heat and variable-speed fans respond to these swings far more efficiently than older single-stage units, maintaining indoor comfort without energy waste. Economizer for Free Cooling Calgary’s cool spring and fall seasons offer excellent economizer opportunities. RTUs equipped with air-side economizers can provide free cooling using outside air when temperatures are favourable — significantly reducing annual cooling energy costs for Calgary facilities. RTU Capacity Ranges and Applications at NextAir Light Commercial RTUs (2–10 Tons) Ideal for Calgary small retail stores, restaurants, medical offices, and professional services offices. NextAir supplies and installs units in this range from leading manufacturers, properly sized for the specific occupancy, envelope, and internal loads of your building. Commercial RTUs (10–50 Tons) The workhorse of Calgary’s commercial HVAC market, mid-range RTUs serve everything from mid-size office buildings to grocery stores and healthcare facilities. Proper zoning design and controls integration are critical at this scale, and NextAir’s engineering team handles full project design and installation. Large Commercial / Industrial RTUs (50+ Tons) Large RTUs serve Calgary’s industrial facilities, big-box retail, institutional buildings, and campus settings. These units often require custom configuration, dedicated curbing, structural roof assessments, and sophisticated controls integration — all services NextAir provides. Key Features to Look For in a Calgary RTU High-efficiency gas heat exchangers rated for Canada’s cold climate requirements Variable frequency drives (VFDs) on supply fans for reduced energy consumption and precise airflow control Integrated economizer with enthalpy control for Calgary’s mixed humid/dry climate Low-ambient cooling capability for Calgary’s cold spring and fall seasons Two-stage or modulating heating for efficient operation during milder Calgary winter days MERV-rated filtration options for Calgary’s dust and wildfire smoke conditions BACnet or LON communications for integration with building automation systems RTU Replacement vs. Repair: How NextAir Helps Calgary Businesses Decide One of the most common questions we receive from Calgary facility managers is whether to repair an aging RTU or invest in a replacement. Key factors include: Age: RTUs older than 15–20 years are typically candidates for replacement, especially as efficiency standards and refrigerant regulations have significantly advanced. Refrigerant type: Units still running on R-22 refrigerant face increasing service costs and supply constraints. NextAir can assess whether retrofitting or replacement makes more economic sense. Repair frequency: If you’ve had two or more significant repairs in recent years, a NextAir technician will help you conduct a lifecycle cost analysis to determine the replacement ROI. Energy costs: Modern high-efficiency RTUs can reduce energy consumption by 20–40% compared to units from the early 2000s — a significant annual saving for Calgary facilities with high energy costs. Related: Reznor Unit Heaters Calgary — Industrial & Warehouse Heating | NextAir Related: Reznor Tube Heaters Calgary — Radiant Infrared Heating | NextAir Related: Reznor Makeup Air Units Calgary — MUA Supply & Install | NextAir Related: All Commercial HVAC Solutions Calgary — NextAir.ca Home Frequently Asked Questions — Rooftop Units Calgary How long does a commercial RTU last in Calgary’s climate? With proper preventive maintenance, a quality commercial RTU should last 15–25 years in Calgary’s climate. Units that are poorly maintained or undersized for the application often fail significantly earlier. NextAir offers preventive maintenance contracts designed to maximize your RTU lifespan. What does RTU installation involve in Calgary? Installation includes structural roof assessment, custom curb fabrication or supply, crane lift for larger units, ductwork connection, gas piping, electrical wiring, refrigerant commissioning, and controls setup. NextAir manages the entire process including permits from the City of Calgary. Can NextAir replace just the RTU without replacing the ductwork? In many cases, yes. If existing ductwork is in good condition and appropriately sized for the new unit, we can simply connect the new RTU. Our technicians inspect the existing duct system as part of the replacement assessment process. Do you service RTUs from brands other than Reznor? Yes. NextAir’s service team is experienced with all major commercial RTU brands including Carrier, Trane, Lennox, York, Daikin, and more. We can service, repair, and maintain any RTU brand installed in your Calgary facility.

Reznor Makeup Air Units in Calgary: Everything You Need to Know About MUA Systems If your Calgary commercial kitchen, manufacturing plant, spray booth, or industrial facility exhausts large volumes of air, you need a makeup air unit (MUA) to replace it — and failing to do so correctly creates dangerous negative pressure, code violations, and serious energy inefficiency. NextAir.ca specializes in Reznor makeup air unit supply, design, and installation across Calgary. In this complete guide, we explain what makeup air units do, why they’re critical, and how to choose the right Reznor model for your facility. What Is a Makeup Air Unit and Why Does Your Calgary Building Need One? A makeup air unit (also called a replacement air unit or fresh air handler) replaces the conditioned air that is exhausted from a building by ventilation fans, commercial kitchen hoods, industrial exhaust systems, or spray booths. In Calgary’s cold winters, this replacement air must be heated to maintain comfortable interior temperatures and prevent negative pressure problems. Negative pressure in a building — caused by exhausting more air than is supplied — creates serious problems including: Back-drafting of combustion appliances (furnaces, boilers, unit heaters) — a significant carbon monoxide risk in Calgary’s winter when buildings are sealed tight Difficulty opening exterior doors, creating safety hazards and fire code violations Uncomfortable drafts and cold spots near building openings Reduced efficiency of exhaust systems — hoods and fans can’t pull adequate air flow when fighting negative pressure Potential code violations with Alberta building and fire safety regulations How Reznor Makeup Air Units Work A Reznor MUA unit draws fresh outside air, heats it with gas-fired heat exchangers, and delivers it into the space at a controlled temperature and volume. In Calgary’s climate, this typically means heating outside air from temperatures as low as -40°C to delivery temperatures between 13°C and 21°C depending on the application. Key components include: Gas burner assembly with modulating heat output matched to outdoor temperature High-efficiency heat exchanger for maximum energy transfer Variable-speed supply fan for precise airflow control Controls and sensors for temperature, airflow, and building pressure balancing Optional energy recovery ventilators (ERV) for additional efficiency in Calgary’s cold climate Top Reznor Makeup Air Units Available Through NextAir Reznor MACH Series — High-Capacity MUA The MACH Series is engineered for large-volume makeup air applications in Calgary industrial facilities, distribution centres, and manufacturing plants. With capacities up to hundreds of thousands of BTU, the MACH Series handles even the most demanding exhaust replacement requirements. Reznor WATTMASTER-Controlled MUA Units Reznor makeup air units with integrated Wattmaster controls provide sophisticated modulation and building pressure management. These are the preferred choice for Calgary facilities where tight pressure control is critical, such as pharmaceutical manufacturing, clean rooms, or facilities with multiple exhaust zones. Reznor RPB Series — Rooftop Packaged MUA For Calgary facilities where indoor equipment space is limited, the RPB Series packages the entire makeup air system into a rooftop unit. This eliminates interior space requirements and simplifies installation in existing buildings — a common scenario in Calgary’s dense industrial parks. Industries in Calgary That Require Makeup Air Units Commercial restaurants and institutional kitchens: Every commercial kitchen exhaust hood requires replacement air. Calgary’s building code requires makeup air for kitchen exhaust exceeding certain volumes. Automotive paint and body shops: Spray booths require precisely balanced makeup air to ensure correct paint application and safe solvent vapour dilution. Industrial manufacturing and fabrication: Welding fumes, dust collection, and process exhaust all create negative pressure that MUA units correct. Cannabis production facilities: Regulated air exchange and pressure balancing are critical for licensed Calgary cannabis producers. Breweries and food processing: Sanitation-related exhaust and process ventilation create significant makeup air requirements. Makeup Air Unit Sizing: What NextAir Considers for Calgary Projects Properly sizing a makeup air unit requires detailed engineering analysis. At NextAir, our design process includes: Total exhaust air volume calculation (CFM) from all exhaust fans, hoods, and ventilation equipment Winter design temperature analysis based on Calgary’s ASHRAE climate data Building pressure balancing requirements and infiltration analysis Gas supply capacity verification at your Calgary utility connection Discharge location planning for optimal air distribution and occupant comfort Alberta Safety Codes review for permit compliance Related: Reznor Unit Heaters Calgary — Warehouse & Industrial Heating | NextAir Related: Reznor Tube Heaters Calgary — Radiant Infrared Heating | NextAir Related: Rooftop Units Calgary — Commercial HVAC Solutions | NextAir Related: All Commercial HVAC Solutions Calgary — NextAir.ca Home Frequently Asked Questions — Reznor Makeup Air Units Calgary Is a makeup air unit required by the Alberta building code? Yes, in most cases. Alberta’s Building Code requires makeup air whenever exhaust rates exceed the natural infiltration capacity of the building. Commercial kitchens, spray booths, and industrial exhaust systems virtually always require a dedicated makeup air system. NextAir’s team ensures all installations are fully code-compliant. Can I add a makeup air unit to an existing building in Calgary? Absolutely. This is one of the most common projects we handle at NextAir — retrofitting makeup air units into existing Calgary commercial and industrial facilities where exhaust problems have developed or where occupancy changes have increased exhaust requirements. How is a makeup air unit different from a rooftop unit? A rooftop unit (RTU) provides conditioned air for space heating and cooling and recirculates interior air. A makeup air unit specifically handles 100% outside air to replace exhausted air. Some facilities need both; NextAir can design integrated systems that coordinate MUA and RTU operation for optimal efficiency. What is the typical cost of a Reznor makeup air unit in Calgary? Costs vary widely depending on airflow capacity, heat output, controls complexity, and installation requirements. Contact NextAir for a detailed quote specific to your Calgary facility — we provide transparent, itemized proposals for all MUA projects.

Reznor Tube Heaters Calgary: Radiant Infrared Heating That Works in Alberta’s Harshest Winters If you operate a warehouse, aircraft hangar, car dealership, or open-plan industrial facility in Calgary, you already know that conventional forced-air heating has its limits. Every time a loading dock door opens, warm air escapes — and your energy bills climb. Reznor tube heaters solve this problem by delivering infrared radiant heat directly to people, floors, and equipment, not just the air. NextAir.ca is Calgary’s trusted Reznor tube heater supplier and installer, helping facilities across the city cut heating costs while maintaining comfortable working temperatures even during Alberta’s most punishing cold snaps. How Do Reznor Tube Heaters Work? Unlike unit heaters that warm the air, infrared tube heaters work like the sun: they emit radiant energy that heats solid objects and people directly. A gas burner heats a long steel tube, which radiates infrared energy downward across the facility floor. Because this heat isn’t carried in the air, opening a large door or having poor ceiling insulation has far less impact on comfort. This makes Reznor tube heaters extremely effective for: Distribution centres and fulfillment warehouses with frequent dock door operation Automotive service bays and car dealership service departments Aircraft hangars and FBOs at Calgary International Airport and Springbank Airport Agricultural buildings, barns, and equipment storage facilities Recreational facilities like arenas, curling rinks, and indoor sports facilities Advantages of Reznor Tube Heaters for Calgary Facilities Energy Efficiency Reznor tube heaters can reduce heating energy consumption by 30–50% compared to unit heaters in facilities with high air change rates. Because heat isn’t wasted on warming stratified air near the ceiling, you’re directing energy exactly where it’s needed. Comfort at Floor Level Radiant tube heaters warm the floor slab and lower levels first — creating a far more comfortable working environment for employees on their feet all day. In Calgary’s cold winters, this translates directly into employee productivity and reduced absenteeism. No Ductwork Required Reznor tube heaters are suspended overhead and connected directly to your gas supply line. There’s no ductwork to plan around, clean, or repair — simplifying installation and reducing maintenance over the life of the system. Quiet Operation With no blower fan required to distribute heat, Reznor tube heaters operate virtually silently — an advantage in automotive showrooms, healthcare facilities, and any environment where noise is a concern. Reznor Tube Heater Models Available Through NextAir Reznor CODF Series — Continuous Linear Tube Heaters The CODF Series provides continuous tube heating across spans from 20 to 60+ feet. This model is particularly popular in Calgary warehouses where even heat distribution across wide floor areas is essential. The CODF can be configured in straight, L-shape, or U-shape layouts to match your facility footprint. Reznor EGHB Series — High-Low Control High-low modulation allows the EGHB to operate at full capacity during warm-up and reduce to a lower output for maintenance heating — significantly reducing gas consumption during occupied hours while maintaining setpoint temperatures. Reznor STS / STU Series — Single-Stage Units For smaller Calgary facilities or zone heating applications, the STS and STU series provide cost-effective radiant heating in a compact tube format, ideal for targeted comfort zones within a larger space. Tube Heaters vs. Unit Heaters: Which Does Your Calgary Facility Need? Many of our Calgary clients ask whether they need tube heaters, unit heaters, or a combination. Here’s a practical guide: High door traffic (loading docks, drive-through bays): Tube heaters are significantly more efficient because radiant heat is not lost when doors open. Enclosed, well-insulated spaces: Unit heaters can be equally effective and are often lower in upfront cost. Mixed-use facilities: A hybrid approach using tube heaters in high-traffic zones and unit heaters in enclosed offices or storage areas is common in Calgary industrial parks. Spaces requiring spot comfort heating: Tube heaters excel at warming specific work areas without heating an entire building. Related: Reznor Unit Heaters Calgary — Warehouse & Industrial Heating | NextAir Related: Reznor Makeup Air Units Calgary — MUA Supply & Install | NextAir Related: Rooftop Units Calgary — Commercial Heating & Cooling | NextAir Related: All Commercial HVAC Solutions Calgary — NextAir.ca Home Frequently Asked Questions — Reznor Tube Heaters Calgary Are Reznor tube heaters safe for occupied spaces in Calgary? Yes. Reznor tube heaters are designed and CSA-certified for installation in occupied commercial and industrial spaces. They combust gas in a sealed burner assembly, and modern units include multiple safety controls including flame sensors, pressure switches, and high-temperature limits. What’s the typical installation time for a Reznor tube heater in Calgary? A single tube heater installation typically takes one to two days including gas piping, suspension, venting, and commissioning. Larger multi-heater projects in big Calgary warehouses may take three to five days depending on scope. Can tube heaters be used with a building automation system (BAS)? Yes. Reznor tube heaters are compatible with most commercial thermostat and BAS control systems, allowing integration with your facility’s overall building controls for scheduled operation, set-back temperatures, and remote monitoring. How often do Reznor tube heaters need servicing in Calgary? Annual preventive maintenance is recommended and often required to maintain warranty. NextAir offers service contracts for Reznor tube heaters across Calgary, covering burner cleaning, ignition system inspection, gas pressure verification, and safety control testing.

Reznor Unit Heaters in Calgary: The #1 Choice for Industrial & Commercial Heating When Calgary’s brutal winters arrive, your commercial or industrial facility can’t afford to rely on an underpowered heating system. Reznor unit heaters have been the trusted standard for warehouses, automotive shops, manufacturing plants, and agricultural buildings for decades — and NextAir.ca is Calgary’s go-to supplier and installer. In this guide, we’ll break down everything you need to know about Reznor unit heaters: how they work, which models are best for Calgary climates, and why NextAir should be your first call. What Is a Reznor Unit Heater? A Reznor unit heater is a gas-fired, forced-air heating unit typically suspended from the ceiling or mounted on walls in large commercial and industrial spaces. Unlike radiant heaters, unit heaters warm the air directly and distribute it using a built-in fan — heating large volumes of space quickly and efficiently. Reznor, a brand under the Nortek Global HVAC umbrella, is renowned for engineering durability and efficiency into every product, making them particularly well-suited for the extreme temperature swings Calgary experiences from October through April. Why Reznor Unit Heaters Are Ideal for Calgary Winters High-Efficiency Gas Heating: Reznor unit heaters are engineered for cold climates, with efficiency ratings that keep operating costs low even during extended cold snaps of -30°C or below. Fast Heat Delivery: The forced-air design circulates warm air throughout large spaces within minutes, critical for Calgary’s rapid temperature drops. Durable Construction: Heavy-gauge steel cabinets resist corrosion from Calgary’s road salt environments near loading docks and garage doors. Flexible Fuel Options: Available in natural gas and propane, compatible with Calgary’s utility infrastructure. CSA Certified: All units meet Canadian safety standards for installation in commercial and industrial settings. Popular Reznor Unit Heater Models Available Through NextAir Reznor UDAP / UDAS Series The UDAP and UDAS unit heaters are among the most widely installed models in Calgary warehouses and garages. They offer power-vented operation, making them highly flexible for buildings with limited flue options. Capacity ranges make them scalable from small shops to large distribution centres. Reznor EGF Series The EGF Series is engineered for maximum efficiency in facilities that need consistent heat over long operating hours. These are a popular choice for Calgary auto dealerships and large commercial garages where the heating system runs continuously throughout the winter. Reznor EGHB Series For facilities requiring horizontal discharge, the EGHB Series provides powerful airflow directed precisely where you need it. Ideal for Calgary manufacturing plants with tall ceilings and open floor plans. How NextAir Handles Your Reznor Unit Heater Project At NextAir.ca, we don’t just sell equipment — we handle the complete project from assessment through installation and commissioning: Site Assessment: Our team evaluates your Calgary facility’s square footage, insulation, ceiling height, and existing gas infrastructure to recommend the right Reznor unit heater model and BTU capacity. Equipment Supply: We source Reznor unit heaters directly through authorized distributor channels, ensuring genuine products and full manufacturer warranties. Professional Installation: Our licensed gas fitters and HVAC technicians handle all mounting, gas piping, venting, and electrical connections to Alberta code. Startup & Commissioning: We test every installation under load conditions before handing over to you. Ongoing Service: NextAir provides preventive maintenance and emergency service for Reznor unit heaters across Calgary and the surrounding area. Reznor Unit Heaters vs. Other Heating Options Calgary facility managers often compare unit heaters against tube heaters, rooftop units, and makeup air systems. Each has its place: Unit Heaters vs. Tube Heaters: Unit heaters warm the air faster; tube heaters provide radiant warmth and are ideal for spaces with high air infiltration. Many Calgary facilities use both in combination. Unit Heaters vs. Rooftop Units: RTUs are better suited for spaces that also require ventilation and cooling. Unit heaters are simpler, lower cost, and ideal for heating-only applications. Related: Reznor Tube Heaters Calgary — Radiant Infrared Heating | NextAir Related: Reznor Makeup Air Units Calgary — MUA Supply & Install | NextAir Related: Rooftop Units Calgary — Commercial HVAC Solutions | NextAir Related: All Commercial HVAC Solutions Calgary — NextAir.ca Home Frequently Asked Questions — Reznor Unit Heaters Calgary How long do Reznor unit heaters last in Calgary’s climate? With proper maintenance, Reznor unit heaters typically last 15–25 years. Calgary’s cold winters mean heating systems run hard, so annual servicing by a qualified technician like those at NextAir is essential to achieving maximum lifespan. Do I need a permit to install a unit heater in Calgary? Yes. Gas appliance installations in Calgary require a permit from the City of Calgary and must be performed by a licensed gas fitter. NextAir handles all permitting and code compliance as part of our installation service. What BTU size do I need for my Calgary warehouse? BTU requirements depend on your facility’s size, insulation level, ceiling height, and number of overhead doors. As a rough guide, Calgary’s climate requires approximately 40–60 BTU per square foot for an uninsulated warehouse. Contact NextAir for a professional heat load calculation. Can NextAir service Reznor unit heaters that were installed by other companies? Absolutely. Our technicians are factory-trained on Reznor products and can service, repair, or upgrade any existing Reznor installation across Calgary.