Heating and cooling services
Repair, replacement and maintenance for the systems that keep a home or business comfortable, from a family-run team west and north of Boston.
Every system we work on
Pick a system to see what we do for it.
Heating
Three kinds of visits
Most calls are one of these. Not sure which one you need? Tell us what is happening and we will help you sort it out.
Repair
Something stopped working or is not working right. We find the cause and give you the price before we fix it.
About repairsReplacement
An old system is worn out. We swap it for a new one quickly, with as little disruption to your home as possible.
About replacementsMaintenance
A yearly tune-up keeps a system healthy and catches small problems before they turn into breakdowns.
About maintenance
For homes and businesses
We work for homeowners and for businesses, with the same repair, replacement and maintenance service.
Homeowners
Furnaces, boilers, heat pumps, mini splits, air conditioners, water heaters and thermostats.
Why OniFixBusinesses
The same systems and the same visits for offices, shops and other workplaces.
Commercial HVACWhere we work
Towns west and north of Boston, from Framingham and Milford to Newton and Woburn.
See the towns
Guides for homeowners
Plain answers to the questions we hear most, before you call or while you decide.
No heat? Check these first
Safe checks to try before you call.
Quick checksAC not cooling?
What to check when the air conditioning blows warm air.
Quick checksRepair or replace?
Age, repairs, cost and safety: how to decide.
Read the guideHeat pump or furnace?
How they compare in a Massachusetts winter.
Read the guideMini split or central air?
Which fits your home, with or without ducts.
Read the guideSeasonal HVAC checklist
What to do each season, and what a tune-up adds.
See the checklist
Need heating or cooling help?
Tell us what is going on. You get the price up front, and we show up on time.