Quick quiz: Massachusetts rebates
A few questions from the programs we track. Tap an answer to see why.
The Three Types, Straight Up
Standard Tank (Gas or Electric)
Cost installed: $1,200-$2,000. Lifespan: 8-12 years. Common in Massachusetts's older triple-decker and colonial housing stock, where a straightforward swap is often the path of least resistance during a renovation.
Tankless (On-Demand)
Cost installed: $2,500-$4,500, often more in older homes needing a gas line or panel upgrade. Lifespan: 15-20 years. Space-saving in Massachusetts's smaller older homes, but New England's cold incoming water temperature means sizing needs more headroom than a manufacturer's default spec.
Heat Pump (Hybrid)
Cost installed: $2,500-$4,500 before rebate. Lifespan: 10-15 years. Uses roughly a third of the electricity of a standard electric tank. With Eversource and National Grid delivery rates both high in Massachusetts, the electricity savings show up faster here than in states with cheaper power.
| Type | Installed cost | After Mass Save rebate | Lifespan |
|---|---|---|---|
| Standard tank | $1,200-$2,000 | $1,200-$2,000 | 8-12 yrs |
| Tankless | $2,500-$4,500 | $2,500-$4,500 (not eligible for the $750 rebate) | 15-20 yrs |
| Heat pump | $2,500-$4,500 | $1,750-$3,750 | 10-15 yrs |
Sizing It Right
Tank sizing (by household size)
- 1-2 people: 30-40 gallons
- 3-4 people: 40-50 gallons
- 5+ people: 60-80 gallons
Tankless sizing (by flow rate)
Size to your peak simultaneous demand, not average use, and in Massachusetts specifically ask for the unit's rated output at New England's winter groundwater temperature, not the manufacturer's default spec.
What the Mass Save Process Actually Looks Like
MassCEC describes the $750 heat pump water heater rebate as instant, for replacing an existing electric, oil, propane or gas water heater. Ask your installer or retailer to apply it at purchase. Other Mass Save rebates are mailed, and Mass Save has had documented processing backlogs. File early, keep every piece of paperwork, and don't assume the check arrives on the timeline a contractor quotes verbally.
What to Ask Before You Sign
- "Are you a Mass Save network-participating contractor?"
- "Is this specific model on the current Mass Save qualifying list?"
- "How long has your last few customers waited for the rebate check?"
- "What's the real installed cost after the $750 rebate?"
The One Number That Matters
A heat pump water heater in a typical Massachusetts home saves roughly $150-$250 a year in electricity versus a standard electric tank. Combined with the $750 rebate, payback on the price difference is usually 4-6 years.
Related Reading
- 12 Ways to Cut Your Energy Bill in Massachusetts
- All Massachusetts Rebate Programs by City
- Mass Save Home Energy Assessment: What to Expect
- Mass Save Rebate Delayed: What to Do
- Heat Pump Buyer's Guide: What Matters Before You Buy
- The $575 You Save Without Doing Anything Different
- Find a Water Heater Installer Near You
