New Boiler Installations Across South Yorkshire
Expert Boiler Installations
Upgrade your home with an energy-efficient boiler from Kassgas. Our Gas Safe registered engineers deliver professional installations across Sheffield, Rotherham, Barnsley, Doncaster, and Chesterfield, focusing on long-term reliability and lower fuel bills.
Trusted Brands Installed by Kassgas
We only work with manufacturers known for quality engineering, high efficiency, and dedicated UK support.
Ideal Heating
Efficient, affordable, and highly reliable boilers manufactured right here in the UK.
Worcester Bosch
Top-tier performance with extended manufacturer warranties and industry-leading support.
Vaillant
Innovative smart heating technology built with world-class German precision and durability.
Baxi
A trusted choice for homeowners prioritizing robust build quality and straightforward servicing.
What We Do
Beyond Boiler Installations
At Kassgas Ltd, we specialize in high-quality, fairly priced boiler installations, but our expertise doesn’t stop there. Our engineers are equipped for every gas and water challenge.
Why Choose Kassgas?
Family-Run Serving South Yorkshire & Chesterfield
Gas Safe Registered Years of field experience
ISO Certified 9001 & 14001 Standards
Fixed Pricing Transparent, no hidden costs
Regional Expertise: Areas We Cover
Sheffield
Energy-efficient upgrades for homes & businesses.
Rotherham
Professional installs with long-term reliability.
Barnsley
Local engineers delivering 5-star rated service.
Doncaster
Affordable installations with excellent aftercare.
Chesterfield
Trusted specialists for homes & landlords.
Our most popular new boiler installations
24kw – 35kw
10 Years Warranty
- Supply One (24kW) or Two (35kW) Outlets At Once
- 10 Year Parts & Labour Warranty
- Free Wireless Thermostat
- All Metal Magnetic Filter Included
25kw – 36kw
10 Years Warranty
- Supple One (25kW) or Two (36kW) Outlets At Once
- 10 Year Parts & Labour Warranty
- Free Wireless Thermostat
- Adey Pro Filter Include In the Box
26kw – 40kw
12 Years Warranty
- Supply One (26kW) or Two (40kW) Outlets At Once
- 12 Years parts & Labour Warranty
- Free Wireless Thermostat
- All Metal Magnetic Filter Included
New Boiler Installation
Our boiler installations can be fitted within 24 hours and all come with a minimum 5 years warranty up to a maximum 12 years. We install 7 days a week to work around your needs and apply no extra cost to weekends.
Boiler Servicing
Boiler Repairs
Power Flush
Landlords / Letting Agents
Plumbing
We can help with any general plumbing work from emergency leaks to outdoor tap installation.
Smart Thermostat
Cooker Installation
Our gas cooker installations comply with all safety regulations. Moving house? We can remove your cooker in one property and install it in another on the same day, including weekends.
Commercial Gas Services
We provide comprehensive Commercial Gas services including installation and maintenance of gas equipment, thorough safety inspections by Gas Safe registered engineers, and energy efficiency solutions to help you save money and reduce your environmental impact.
Why Choose Us
We put customer service and satisfaction above all else. Listening to your needs and doing everything in our power to ensure you are fully happy with everything we do. So if you’re looking for a plumber or heating engineer for your next project, why not give us a call.
Our excellent customer service is second to none, check out our reviews here
