Sub Zero Technical Ltd.

Behind every great service call is an amazing team of professionals. ✅

At Sub Zero, we’re proud of the knowledge, skill, and dedication our team brings to every job—whether it’s residential HVAC, commercial systems, maintenance, troubleshooting, or installation. We believe in showing up prepared, working safely, communicating clearly, and continuing to learn so we can deliver the best possible service to our clients.

We’re grateful for the people behind the work. They’re the reason we can do what we do—and do it well. 👏

📞 Call: 403.252.1715

📧 Email: [email protected]

📍 Office: 4814 1 St SW, Calgary

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Forest fire smoke outside? Your HVAC filter is suddenly very important. 😅🌫️

When smoke is in the air, your first move should be to reduce how much outdoor air gets inside. Keep windows closed, limit door openings, and make sure your HVAC filter is clean and properly installed.

Your system can only perform well if airflow isn’t restricted, so don’t ignore dirty filters, blocked returns, or overdue maintenance. Better airflow and proper filtration can make a noticeable difference in how your home or building feels during smoky conditions.

Have questions about filters, airflow, or indoor air quality? Ask us.

📞 Call: 403.252.1715

📧 Email: [email protected]

📍 Office: 4814 1 St SW, Calgary

📩 DM - Direct message

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Commercial HVAC: keeping businesses comfortable ✅❄️☀️

Comfort matters in every business. It affects staff, customers, tenants, equipment, and day-to-day operations. When your HVAC system is running properly, people notice the comfort. When it isn’t, they notice that even faster. 😄

At Sub Zero, we install, service, repair, and maintain commercial HVAC systems with a focus on reliability, efficiency, and minimizing downtime.

From rooftop units to custom commercial setups, our team has the knowledge and experience to keep your building running the way it should.

Need commercial HVAC support? We’re here to help.

📞 Call: 403.252.1715

📧 Email: [email protected]

📍 Office: 4814 1 St SW, Calgary

📩 DM - Direct message

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Wildfire smoke outside? Keep indoor air quality top of mind. 🌫️🏠

When the air outside is smoky, your HVAC system can play an important role in helping your indoor air feel cleaner and more comfortable.

Start by keeping windows and doors closed, checking your furnace filter, and running your system fan if recommended for your setup.

A clean, properly fitted filter can help reduce airborne particles moving through your home. And if your system hasn’t been serviced in a while, now is a good time to make sure airflow, filtration, and ventilation are working the way they should.

Need help improving your indoor air quality? Give us a call.


📞 Call: 403.252.1715

📧 Email: [email protected]

📍 Office: 4814 1 St SW, Calgary

📩 DM - Direct message

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Photo: CBC News




Photo: CBC News

Energy-saving A/C tips for summer comfort ☀️❄️

Keeping cool doesn’t have to mean making your power bill cry. 😄

A few small habits can help your A/C run more efficiently while keeping your home or building comfortable during hot weather.

Try these simple tips:

✅ Use a consistent thermostat setting

✅ Close blinds during peak sun hours

✅ Change or check your air filter regularly

✅ Keep vents and returns clear

✅ Give your outdoor unit breathing room

✅ Avoid turning the thermostat way down to “cool faster”

✅ Book regular maintenance so your system can perform its best

Comfort matters. Efficiency matters. And yes, your A/C appreciates a little support too.

📞 Call: 403.252.1715

📧 Email: [email protected]

📍 Office: 4814 1 St SW, Calgary

📩 DM - Direct message

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Ask a Tech 🔧❄️☀️

Got an HVAC question? Ask away.

Our team works with residential and commercial systems every day, and we’re always happy to help explain what might be going on.

You can ask us about:

✅ A/C issues

✅ Furnace questions

✅ Hot or cold rooms

✅ Thermostat settings

✅ Filter changes

✅ Rooftop units

✅ Heat pumps

✅ Preventative maintenance

No question is too small. Although “Why is this one room always weird?” is definitely one we hear a lot. 😄

Drop your question below or send us a message.


📞 Call: 403.252.1715

📧 Email: [email protected]

📍 Office: 4814 1 St SW, Calgary

📩 DM - Direct message

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Building maintenance: rooftop units 🏢🔧

Rooftop HVAC units do a lot of heavy lifting behind the scenes. They help keep commercial spaces comfortable for staff, customers, tenants, and equipment, especially during the hottest days of summer.

Regular rooftop unit maintenance helps catch small issues before they become big disruptions. Filters, belts, coils, drains, airflow, and overall system performance all matter when your building depends on reliable cooling.

Because when your rooftop unit is working properly, everyone inside gets to forget it exists. And honestly, that’s the goal. 😄


📞 Call: 403.252.1715

📧 Email: [email protected]

📍 Office: 4814 1 St SW, Calgary

📩 DM - Direct message

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Signs your A/C needs service ❄️🔧

Your air conditioner usually gives you a few warning signs before it fully gives up on summer.

The trick is catching them early, before your home starts feeling like a greenhouse. 😄

Watch for:

✅ Weak airflow from vents

✅ Warm air instead of cool air

✅ Strange noises or rattling

✅ Unusual smells when it turns on

✅ Short cycling, or turning on and off too often

✅ Water around the unit

✅ Higher energy bills with no clear reason

✅ Rooms that never seem to cool down

If your A/C is showing any of these signs, it’s a good time to book a service check. A quick inspection now can help prevent bigger issues later.

📞 Call: 403.252.1715

📧 Email: [email protected]

📍 Office: 4814 1 St SW, Calgary

📩 DM - Direct message

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Outdoor unit care: give your A/C some breathing room 🌿❄️

Your outdoor A/C unit works hard during the summer, and it needs clear space around it to do its job properly.

Grass, leaves, weeds, dirt, and debris can restrict airflow and make the system work harder than it needs to.

A few quick tips:

✅ Keep the area around the unit clear

✅ Trim back grass, weeds, and plants

✅ Remove leaves and debris gently

✅ Avoid covering or blocking airflow

✅ Skip aggressive pressure washing, those fins are more delicate than they look

Think of it like this: your A/C needs personal space too. 😄

📞 Call: 403.252.1715

📧 Email: [email protected]

📍 Office: 4814 1 St SW, Calgary

📩 DM - Direct message

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Tempstar Spotlight: comfort + reliability ❄️☀️

When it comes to home comfort, your HVAC system should do more than turn on and off. It should keep your home feeling steady, efficient, and comfortable through every season.

That’s where Tempstar comes in. Designed with reliability and total home comfort in mind, Tempstar heating and cooling systems help homeowners enjoy consistent temperatures, dependable performance, and peace of mind when the weather outside is doing its thing.

Because comfort should feel easy, not like a daily negotiation with the thermostat. 😄


📞 Call: 403.252.1715

📧 Email: [email protected]

📍 Office: 4814 1 St SW, Calgary

📩 DM - Direct message

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