The short answer: A Mass Save Home Energy Assessment is a no-cost visit (in person or virtual) where an Energy Specialist checks your home's insulation, air leaks, heating, cooling and hot water, runs a safety test on any gas or oil equipment, and then gives you a written report listing the rebates you qualify for. An in-person visit usually takes about two hours. It's the first step to the 75–100% off insulation offer, and it's often the smartest place to start before you buy a heat pump.
With heating oil above $6 a gallon this fall, a lot of Webster and Worcester County homeowners are asking us what this visit really involves. Here's an honest walk-through, including the parts that can slow you down.
Want help figuring out your next step after the visit? Call Lela Homelife at 774-228-5351. We're open Sundays, 8 AM–3 PM.
Who this is for (and who it isn't)
This visit is a good fit if you:
- Own or rent a 1- to 4-unit home in Massachusetts
- Get electric or gas service from a Mass Save sponsor, such as Eversource, National Grid, Unitil or Berkshire Gas
- Have drafty rooms, ice dams, high oil or propane bills, or you're thinking about a heat pump
It's probably not for you if:
- Your electricity comes from a municipal light plant (some Worcester County towns have one). Municipal utilities aren't part of Mass Save, so call your town's utility directly.
- You live in a 5+ unit building. Talk to your landlord about the multi-family program instead.
Step 1: Booking the visit
You can book by calling Mass Save at 866-527-SAVE (866-527-7283) or online at Mass Save's Home Energy Assessment page. You enter your zip code and heating fuel, and you'll be matched with the lead vendor for your area. You can also choose a participating Home Performance Contractor, who can do the assessment and then come back to do the insulation work.
You can pick a virtual or in-person visit. Virtual is faster to schedule. In person is more thorough, especially for older New England homes with attics and basements that are hard to show on a phone camera.
[PLACEHOLDER: Is Lela Homelife a participating Home Performance Contractor or Heat Pump Installer Network (HPIN) contractor? If yes, add one line here about booking through Lela. If no, keep this section as is.]
Step 2: The walk-through (about 20–30 minutes)
The Energy Specialist will ask about your goals first. Lower bills? A cold upstairs bedroom? Adding air conditioning? Then they'll walk the home with you, usually starting in the basement and ending in the attic. They look at:
- Insulation in the attic, walls and basement
- Air leaks around the attic hatch, rim joists, windows and doors
- Your heating system, whether that's an oil boiler, gas furnace, propane or electric baseboard
- Your water heater
- Windows, lighting and appliances
Make sure someone 18 or older is home for the whole visit, and clear a path to the attic and basement.
Step 3: The blower door test (about 25 minutes)
This is the part most people haven't seen before. The specialist puts a big fan in an outside door and pulls air out of the house. That shows how leaky the home is and where the air sneaks in. Many older Central MA homes are surprisingly leaky, and this test is what proves it.
Step 4: The safety check
If you have gas or oil equipment, the specialist runs a combustion safety test on your furnace or boiler, water heater and gas range. It checks for carbon monoxide and makes sure everything vents correctly, according to Mass Save's safety page. If they find a problem, they'll tell you the next steps right away.
Step 5: Your report and rebates
At the end you get a custom report (Mass Save calls it a Decarbonization Report) that lists what your home needs and what you qualify for. As of fall 2026, that can include:
- 75–100% off approved insulation improvements
- No-cost targeted air sealing
- Rebates on heating, cooling and water-heating equipment, based on what the visit found. Heat pump rebates are up to $8,500 for 2026 installs, dropping to a $7,500 maximum for installs on or after January 1, 2027.
- The Mass Save HEAT Loan, up to $25,000 at 0% for eligible upgrades
Income-qualified households and homes in designated equity communities may get even more, up to no cost for some upgrades.
The honest part: what can slow you down
This is where we see the most frustration, so it's worth knowing ahead of time. Mass Save's own standards list a few things that stop insulation until you fix them:
- Knob-and-tube wiring. It's common in homes built before about 1955. If any is found, no insulation goes in those areas until a licensed electrician deals with it. Mass Save offers barrier grants that can help with the cost.
- Roof leaks. An unrepaired leak blocks attic insulation. This is one of the most common reasons a project stalls.
- Moisture or mold in the basement or attic.
- Asbestos-like material, such as some old vermiculite insulation.
- A combustion safety problem with your heating equipment.
None of these mean you can't save money. They just add a step. If your roof is the barrier, that's worth knowing early, especially if you've also been thinking about solar. Some homes can bundle a new roof with solar through a PPA, but every house is different, so ask before you assume.
Hit a barrier on your report and not sure what to do next? Call us at 774-228-5351 and we'll walk you through your options honestly, even if we're not the right fit.
What the visit won't do
- It won't install a heat pump. For that, you get quotes from a contractor in the Heat Pump Installer Network. For a typical oil-to-heat-pump conversion on an average Central MA house, Lela's estimate is about $22,000–23,000 before incentives. That's an estimate, not a quote, since every home is different.
- It won't fix everything that day. Insulation and air sealing are booked as a follow-up visit.
- It doesn't commit you to anything. You can take the report and decide later.
One tip: if you're planning a heat pump, do the assessment and weatherization first. A tighter home needs less heating, which can mean a smaller system and lower bills. And if you want the 2026 rebate amount, don't wait too long, because installs on or after January 1, 2027 get the lower rebate.
Frequently asked questions
Is the Mass Save Home Energy Assessment really free?
Yes. The assessment itself is no cost for eligible homes. The upgrades it recommends may have a cost, though insulation is 75–100% off.
How long does it take?
Plan on about two hours for an in-person visit. Bigger homes can take longer.
Do I need to be home?
Yes. An adult 18 or older needs to be there for the whole visit.
Can renters get one?
Yes. Mass Save offers assessments for renters and for landlords of 1- to 4-unit buildings.
I already know I want insulation. Do I have to do the assessment?
Not always. Mass Save lets you skip the assessment and work directly with an approved weatherization contractor for insulation and air sealing incentives.
Do I need the assessment to get a heat pump rebate?
Eligibility for some rebates depends on what the assessment finds, so it's a good first step. Your heat pump contractor can tell you exactly what's required for your home.
The bottom line
A Mass Save Home Energy Assessment is two hours of your time, costs nothing, and tells you exactly which rebates your home qualifies for. The one thing to watch for is a barrier like old wiring or a roof leak, which you'll want to handle early.
Ready to plan your next upgrade? Call Lela Homelife at 774-228-5351 or visit lelahomelife.com/mass-save for a free estimate. We serve Webster, Worcester and towns across Central Massachusetts, and we're open Sundays, 8 AM–3 PM.
Sources: Mass Save Home Energy Assessments, Mass Save: Saving Energy Safely, Mass Save Energy Assessment Standards, Neeeco: What to Expect. Rebate amounts as of fall 2026 and subject to change.
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