HVAC Plus LLC

Prevent unexpected breakdowns and keep your heating and cooling system running efficiently with our comprehensive HVAC maintenance plans. For homeowners and businesses in Dover, routine maintenance is the smartest investment you can make—it extends equipment life, lowers energy bills, and improves indoor air quality. Our certified technicians thoroughly inspect every component, clean coils, check refrigerant levels, test safety controls, and lubricate moving parts. We also verify thermostat accu...

Upgrading your heating or cooling system is a big decision—but with HVAC Plus LLC, it’s a stress-free experience. We handle complete installations of energy-efficient furnaces, air conditioners, heat pumps, boilers, and ductless mini-splits for Dover homes and businesses. Our process starts with a thorough assessment of your space, insulation, ductwork, and comfort goals. We don’t just sell you the biggest unit; we calculate the right size for maximum efficiency and even temperatures. Once we re...

Boilers are the heart of many Dover homes, providing steady, radiant heat through cold New England winters. At HVAC Plus LLC, we specialize in complete boiler services—from installation and routine maintenance to emergency repairs. Our technicians have extensive experience with all boiler types, including gas, oil, and high-efficiency condensing models. During a maintenance visit, we inspect the heat exchanger, check for leaks, test pressure relief valves, bleed radiators, and verify proper comb...

We are a locally owned team that has served Dover homes and businesses for more than 20 years, handling heating, cooling, and indoor air quality work with honest pricing and no pushy sales. Our HVAC service covers quick repairs, system upgrades, and regular maintenance. We arrive on time, explain your options in plain terms, and aim to get the job done right the first time. Whatever your system is, from boilers and ductwork to mini-splits and air cleaners, we will keep your property comfortable...

When your heat stops working or starts making odd noises, you need someone who can find the problem quickly. Our heating repair work covers furnaces, heat pumps, boilers, and ductwork throughout Dover. We diagnose the fault, explain what failed and why, and give you clear options before any work begins. We keep common replacement parts on our trucks, so many repairs are finished in a single visit. Our pricing is transparent and there are no hidden fees. If your system is aging and keeps needing...

Installing a new air conditioner is a significant investment, so we start by looking closely at your home or building. We assess insulation, ductwork, and your comfort goals, then calculate the correct size for the space rather than simply selling the largest unit. Our technicians install the system with careful attention to refrigerant lines, duct connections, and thermostat setup, and they test every function before they leave. We walk you through how the system runs and how to maintain it. Ne...

A furnace that goes unchecked is more likely to fail on the coldest night of the year. Our furnace maintenance visits are thorough: we clean components, check refrigerant and safety controls, lubricate moving parts, verify thermostat accuracy, and tighten electrical connections. Fall inspections prepare your system for winter, and regular service can extend equipment life, reduce energy use, and help keep your manufacturer warranty valid. After each visit you receive a written report describing...

Boilers are common in Dover homes, and when one goes down, you want it fixed without a long wait. Our technicians work on gas, oil, and high-efficiency condensing boilers. We diagnose problems such as strange noises, uneven heating, and pilot light faults, and we carry many of the parts needed to finish the job in one visit. We also check heat exchangers, pressure relief valves, and combustion during service so small issues do not become emergencies. If your boiler is aging or breaking down ofte...

Ductless mini-split systems are a practical choice for homes and offices that lack ductwork or need heating and cooling in specific rooms. We install mini-splits with careful attention to placement, refrigerant line sizing, and sealing, so the unit runs quietly and efficiently. Before recommending a setup, we evaluate the layout, insulation, and the areas you want to control. Once the system is in, we test it and show you how to run the controls and handle routine care. Our installations come wi...

Ductless HVAC systems let you heat and cool individual rooms without the energy loss of traditional ductwork, which makes them a good fit for additions, older homes, and buildings that were never ducted. We size each system for the space, select the right indoor units, and route the connecting lines neatly. Our technicians handle the full installation and check that airflow and temperature control work as they should. We also provide maintenance and repair for existing ductless equipment, so you...

Good indoor air matters for comfort and health, especially during the heating season when homes are sealed up tight. Our indoor air quality solutions include air cleaners and filtration upgrades that work with your existing heating and cooling equipment. We first look at your system and your household needs, then recommend options that fit your budget and are sized correctly for your home. Installation is handled by our technicians, who make sure the equipment is set up properly and running as i...