Emergency service
Markham boiler service


Ultra Gas S3 CT Gas Boiler

Product Specifications

- Boiler Intelligence for Every Heating Need

- Optimal Efficiency for Multiple Temperatures

- Quick System Presets to Match any Application

- Seamless Multiple Boiler Control


- Gas fired water boiler with cast aluminum heat exchanger

- Venturi mixing body mixes air and gas providing higher efficiency

- Designed to operate in low temperature condensing applications

- Outdoor reset and domestic hot water priority standard

- Negative regulated gas valve precisely delivers gas to the boiler

- U-Control gives you the power for easy set-up and maintenance

- Modulates with 5 to 1 turn-down ratio

- Variable speed motor matches combustion output to heating needs

- High grade stainless steel burner features quiet operation, high efficiency, and cleaner combustion for low NOx applications


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  What Customers Say About our Services

I had an old boiler and it was time for replacement. My friend suggested me about cosmopolitan. The representative was so knowledgeable and answered all my questions. Arshad visited my house and showed me some good high efficiency boilers. The service they provide is excellent and highly recommended. - Lucas From Toronto

I got my complete HVAC system replaced by cosmopolitan mechanical service and found them very knowledgable and professional. Everything went smooth from the sales presentation to the expert installation job.I will strongly recommend cosmopolitan mechanical service. - Gabrielle From Hamilton

Ather fixed my furnace today and I was very impressed with his work. He has an old school work ethic combined with current knowledge of technology. He was a real gentleman. Thank you for sending him. - Anne Rankin From Etobicoke

We bought a new home and needed Air conditioner and Furnace. We emailed Several companies, Cosmopolitan e-mailed me with information about the job needed to be done. A service adviser came our home. Friendly and trustworthy are definitely true features when working with a company like Cosmopolitan. - Linda From Mississauga