After Hours Emergency Service Phone number (519) 872 -5593 FREE 3 month Maintenance / Protection plan

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Get FREE Estimates

Get FREE Estimates

Welcome to CASI Heating and Cooling
in London, Ontario

CASI Heating and Cooling is a fully licensed and professional HVAC and air/water purification company. Based out of London, Ontario, CASI serves clients from Windsor to Ottawa and everything in between. CASI is a certified American Standard dealer, which is the number one rated furnace and air conditioning as voted by consumers in Canada for the last 11 years.

CASI offers services from furnaces, air conditioning systems, purification for air and water, full maintenance and protection packages, to the duct and furnace cleaning. Our licensed gas fitters insure a perfect job with every customer, not only with our furnace and duct divisions but also with our water division.

With our competitive pricing, top of the line products, impeccable customer service, and incredible protection plans, it’s no wonder that CASI is the number one HVAC and water purification company in South-Western Ontario. Please take a look at our online product line, and feel free to call our office for a free quote on a furnace, A/C, duct cleaners, air purifiers, water conditioners and softeners, or reverse osmosis water purifiers.

Welcome to CASI Heating and Cooling

CASI Heating and Cooling is a fully licensed and professional HVAC and air/water purification company. Based out of London, Ontario, CASI serves clients from Windsor to Ottawa and everything in between. CASI is a certified American Standard dealer, which is the number one rated furnace and air conditioning as voted by consumers in Canada for the last 11 years.

CASI offers services from furnaces, air conditioning systems, purification for air and water, full maintenance and protection packages, to the duct and furnace cleaning. Our licensed gas fitters insure a perfect job with every customer, not only with our furnace and duct divisions but also with our water division.

With our competitive pricing, top of the line products, impeccable customer service, and incredible protection plans, it’s no wonder that CASI is the number one HVAC and water purification company in South-Western Ontario. Please take a look at our online product line, and feel free to call our office for a free quote on a furnace, A/C, duct cleaners, air purifiers, water conditioners and softeners, or reverse osmosis water purifiers.

%

Satisfaction Guaranteed

Years on Market

Our Products

“Indoor Air Pollution is the NUMBER ONE THREAT to Our Health Today!”

HEATING & COOLING

Manufacturers

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american-standard-logo
nexia-logo
honeywell-logo
nexia-logo

24/Hour Emergency Service

INDOOR AIR QUALITY

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