Question 1

Is it an emergency (no heat in winter, gas smell)?

Accepted Answer

If you smell gas, leave the house and call your gas company first. No-heat situations in freezing weather qualify for emergency service — tell the dispatcher so they can prioritize. Emergency HVAC calls typically cost more than scheduled visits.

Question 2

What type of system do you have?

Accepted Answer

Central air, heat pump, mini-split, furnace, boiler — the tech needs to know before arriving. If you're not sure, check the unit label or send a photo of the indoor and outdoor units.

Question 3

When was the system last serviced?

Accepted Answer

Annual maintenance is standard. If your system hasn't been serviced in years, mention it — the tech may need to do a full tune-up before diagnosing a specific issue.

Question 4

What exactly is happening — or not happening?

Accepted Answer

Is it blowing warm when it should be cold? Making a noise? Short-cycling? Not turning on at all? Specific symptoms narrow the diagnosis and let the tech bring the right parts.

Question 5

Have you checked the thermostat and filter?

Accepted Answer

A dead thermostat battery or a clogged filter causes most 'system not working' calls. Check both before scheduling — you may save yourself a service fee.

Question 6

How much does AC installation cost in Boston?

Accepted Answer

AC installation costs in Boston, MA vary by system type and size. Compare local HVAC pros on HireLocal and get free quotes.

Question 7

Who installs central air or mini-splits in MA?

Accepted Answer

HVAC technicians install AC systems. On HireLocal every pro is local. See AC installation services in Boston, MA and get free quotes.

Question 8

What is a HVAC tonnage?

Accepted Answer

A unit of measure for air conditioning capacity. One ton equals 12,000 BTU/hour of cooling capacity. Residential AC systems typically range from 1.5 to 5 tons. Proper sizing is critical: an undersized system can't cool the home adequately, while an oversized system short-cycles (turns on and off frequently), wastes energy, and fails to dehumidify properly. System size is determined by a Manual J load calculation that considers square footage, insulation, window area, climate zone, and occupancy. A 2,000 sq ft well-insulated home in a moderate climate typically needs a 3–3.5 ton system.

Question 9

What is a Central air conditioning?

Accepted Answer

Central air conditioning is a whole-home cooling system that uses a single outdoor compressor/condenser unit connected to an indoor evaporator coil mounted in or near the furnace. Cooled air is distributed through the same ductwork used for heating. A central AC system is sized in tons (1 ton = 12,000 BTU/hr), with most homes requiring 2–5 tons depending on square footage, insulation, climate, and window area. Installation typically costs $3,500–$7,500 for the equipment and $1,500–$3,000 for labor if ductwork already exists. Adding new ductwork can raise the total to $10,000–$15,000+. Central systems are more efficient and quieter than window units, and a properly sized system can reduce humidity as well as temperature. Efficiency is measured by SEER (Seasonal Energy Efficiency Ratio) — current federal minimums are SEER 14–15 depending on region, while high-efficiency models reach SEER 20+. A central AC system typically lasts 15–20 years with annual maintenance. Homeowners should change the filter every 1–3 months and schedule professional maintenance before each cooling season.

Question 10

What is a SEER rating?

Accepted Answer

Seasonal Energy Efficiency Ratio — the standard measure of air conditioner and heat pump cooling efficiency. It's calculated by dividing the total cooling output (in BTU) over a typical cooling season by the total electrical energy input (in watt-hours). Higher SEER means lower operating costs. As of January 2023, the US minimum is SEER2 14.3 in the North and 15.2 in the South. Mid-range units are SEER 16–18; premium units hit SEER 20–26. Each point of SEER improvement saves roughly 7% on cooling costs. When shopping for AC, compare SEER alongside upfront price — a higher-SEER unit costs more but may pay for itself in 5–8 years through lower bills.

Question 11

What is a Energy Star certification?

Accepted Answer

A voluntary US government-backed label indicating that a product meets strict energy efficiency criteria set by the EPA and Department of Energy. For HVAC equipment, Energy Star certification means the unit exceeds minimum federal efficiency standards by a significant margin — typically 10–15% for central AC, 8–10% for furnaces, and 15–20% for heat pumps. Energy Star-certified products often qualify for utility rebates ($200–$500) and federal tax credits (up to $2,000 for heat pumps under the Inflation Reduction Act). The label covers appliances, windows, insulation, and even entire homes. When comparing products, Energy Star is a reliable floor — but the Most Efficient sub-label identifies the top performers within each category.

Question 12

What is a Mini-split (ductless heat pump)?

Accepted Answer

A ductless heating and cooling system consisting of an outdoor compressor/condenser unit connected by refrigerant lines to one or more indoor air-handling units ("heads") mounted on walls or ceilings. Unlike central HVAC that pushes conditioned air through ductwork, mini-splits deliver heating and cooling directly into individual rooms or zones, eliminating the 25–30% energy loss typical of ducted systems. Each indoor head has its own thermostat and remote control, allowing different rooms to be set to different temperatures — or turned off entirely when unoccupied. Single-zone systems (one outdoor unit, one indoor head) cost $1,500–$4,000 installed and are ideal for room additions, converted garages, or supplementing central HVAC in problem rooms. Multi-zone systems (one outdoor unit, 2–5 indoor heads) cost $3,000–$10,000+ and can replace central HVAC entirely. Modern inverter-driven mini-splits achieve SEER2 ratings of 20–42 (vs. 14–18 for typical central AC), making them 30–60% more efficient. In heating mode, cold-climate models (Mitsubishi Hyper-Heat, Fujitsu XLTH, LG Red) produce heat down to -13°F (-25°C) at COP ratings of 1.5–2.0, meaning they produce $1.50–$2.00 of heat per $1.00 of electricity consumed. Installation requires a licensed HVAC technician: mounting the indoor head, running refrigerant lines through a 3-inch wall penetration, connecting electrical, and performing vacuum and charge testing. Line-hide covers ($150–$300) conceal exterior refrigerant lines for cleaner aesthetics. Most installations complete in 4–8 hours per zone.

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