Heating & Cooling Solutions for Year-Round Comfort
Trethewey Brothers has been keeping Boston homes warm in the winter and cool in the summer for over 100 years. Whether you’re dealing with a boiler breakdown, planning an energy-efficient upgrade, or exploring ductless options, our expert technicians are ready to help.
From installation and repairs to long-term maintenance, we handle a wide range of heating and cooling systems—boilers, heat pumps, mini-splits, water heaters, and more.
Our Heating & Plumbing Services
Explore our wide range of professional heating & plumbing services. Tap a service to learn more or schedule a visit.
Boilers
Keep your home warm and efficient with expert boiler services. Whether it’s a repair, replacement, or brand-new installation, we work with all major systems to ensure lasting comfort. If your boiler is outdated or showing signs of wear, we’ll help you choose the best fit for your home and energy needs.
Heat Pumps
Heat pumps are one of the most efficient ways to heat and cool your home. We install, repair, and maintain all types of systems—including traditional and ductless options—to deliver year-round comfort and major energy savings.
Ductless Mini-Split
Ideal for homes without ductwork, mini-split systems provide targeted, whisper-quiet comfort in any room. Our team handles full installation and replacements with precision and care, helping you create customizable zones while lowering energy use.
Water Heaters
Don’t get left in the cold—our team installs, maintains, and replaces traditional tank and tankless water heaters. Whether yours is struggling or it’s simply time for an upgrade, we’ll help keep your hot water flowing efficiently.
Heating system Maintenance
Regular service is key to long-term system performance. We offer thorough tune-ups and inspections to catch small issues before they become big problems—saving you money and avoiding winter breakdowns.
Air Quality Solutions
Breathe easier at home with professionally installed humidifiers, dehumidifiers, and filtration systems. We customize your setup to address allergens, dry air, or moisture problems so your whole household stays healthier.
Energy-Efficient Upgrades
From thermostatic radiator valves to radiant floor heating and hydronic air elimination, we help homeowners lower energy use without sacrificing comfort. Our team recommends smart, cost-effective upgrades that work for your space.
Common Heating & Cooling Questions We Hear
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If your boiler is over 15 years old, requires frequent repairs, or isn’t heating your home efficiently, it may be time for a replacement. Rising utility bills are also a key sign that your system is working harder than it should.
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Both heat pumps and ductless mini-splits provide heating and cooling. A heat pump typically works with a central system or ducts, while a mini-split delivers zoned climate control without the need for ductwork.
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You can absolutely install a mini-split in just one room. They’re perfect for home offices, additions, and bedrooms—anywhere you want targeted comfort without upgrading your whole HVAC system.
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We recommend annual maintenance—ideally before the cold season hits. This helps catch any small issues, extend the life of your system, and keep it running at peak efficiency.
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Yes! Modern mini-splits are designed to perform well even in very low temperatures. We’ll make sure you have the right system for your home’s size and insulation level.
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Inconsistent hot water, strange noises, or signs of rust near your unit can all point to a failing water heater. If it’s 8–12 years old, it’s worth having it inspected before it gives out unexpectedly.
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You can schedule a service visit online by clicking the “Schedule a Visit” button at the top of this page, or by giving us a quick call. Our team is ready to help you find a time that works best for your schedule.