Middlesex County, Massachusetts
Heating and AC repair in Waltham, MA
Call and describe the problem, whether the furnace will not light, the heat pump is iced over or the air conditioner is blowing warm air, and you will be connected with an independent HVAC contractor serving Waltham.
Your call is connected to an independent HVAC contractor, subject to availability in your area. HVAC Nation may receive compensation when your call is connected with a participating provider. Providers are independent businesses.
Waltham at a glance
Heating and cooling climate
NOAA's 1991–2020 climate normals for the BEDFORD HANSCOM FLD, MA station (about 6 miles away) show about 5,996 heating degree days and 743 cooling degree days in a typical year, with about 139 nights at or below freezing and 15 days reaching 90°F or more. Heating demand is far larger than cooling demand here, so the furnace, boiler or heat pump carries most of the load and a breakdown in a cold snap is the most pressing kind of call.
How homes in Waltham are heated
According to the Census Bureau's American Community Survey, 53% of occupied homes in Waltham heat mainly with utility gas, 24% with electricity and 19% with fuel oil or kerosene. Gas-fired furnaces and boilers are the most common setup, which means igniters, flame sensors, gas valves and venting come up often on heating calls. Oil heat is still used in about 19% of homes, usually with a boiler or oil furnace.
Housing age and HVAC systems
The median year built for housing in Waltham is 1961, and about 69% of its 26,728 housing units were built before 1980. Homes from this era commonly have forced-air furnaces with ductwork, and many have had the original furnace and air conditioner replaced at least once.
Services most relevant in Waltham
- Furnace Repair (75% of homes heat with gas, propane or oil)
- Boiler Repair (19% of homes use oil heat)
- AC Repair (about 15 days a year at 90°F or more)
- AC Replacement (median home built in 1961, many systems on their second or third AC)
- HVAC Repair (one call when you are not sure which part failed)
Owners, landlords and tenants
About 50% of occupied homes in Waltham are owner-occupied and 50% are rented. Homeowners, landlords and property managers can call to be connected; tenants should contact their landlord or property manager about heating or cooling problems first.
Nearby places
Waltham is in Middlesex County. Places within about 30 miles include Boston (12 mi), Cambridge (6 mi), Lowell (18 mi), Brockton (24 mi) and Lynn (15 mi).
Other Massachusetts locations
Somerville (7 mi), Malden (10 mi), Chelsea (11 mi), Revere (13 mi), Peabody (17 mi), Salem (19 mi), Haverhill (28 mi), Attleboro (32 mi)
Questions
Is HVAC Nation an HVAC company in Waltham?
No. HVAC Nation is a referral service. Calls from Waltham are connected to an independent HVAC contractor, subject to availability in Middlesex County.
How do most homes in Waltham heat?
Census survey data shows about 53% of homes heat mainly with utility gas, 24% with electricity, 3% with propane and 19% with fuel oil.
How cold and hot does it get around Waltham?
NOAA normals for the BEDFORD HANSCOM FLD, MA station average about 139 nights a year at or below 32°F and 15 days at 90°F or above.
Is a permit needed to replace a furnace or air conditioner in Waltham?
Many cities and counties require mechanical or electrical permits for equipment replacement. Check with the local building department for Waltham or Middlesex County, and ask the contractor.
What should I do if I smell gas?
Leave the home right away without using switches or phones inside, then call the gas utility emergency line or 911 from outside.
Sources: U.S. Census Bureau Vintage 2024 population estimates; American Community Survey 2020–2024 5-year (tables B25040 house heating fuel, B25034, B25035, B25003); 2024 Gazetteer; NOAA NCEI U.S. Climate Normals 1991–2020 (heating and cooling degree days, base 65°F).