Model page, ductless single-zone
Mitsubishi M-Series H2i+
The wall-mounted Mitsubishi that installers in Vermont and Maine quote most, built to keep its heat when the temperature goes far below zero. Here is what we verified from the model submittal and the manufacturer, what each state pays for it, and what we could not verify.
The unit and the cold numbers
100%
Of rated heating capacity kept at -5F, from the model submittal
70-81%
Of rated heating capacity kept at -13F, depending on unit size
The H2i+ (“Hyper-Heating”) line is Mitsubishi’s cold-climate family of wall-mounted single-zone units. Outdoor units in the MUZ-FS series run from 6,000 to 15,000 BTU/h; a typical quote pairs a MUZ-FS12NA outdoor unit with an MSZ-FS12NA indoor unit. Every unit above carries the temperature labels you already saw on our home page: 5F is the cold snap you fear; -5F and -13F are colder.
100%
-5F
Colder than the cold snap you fear — of rated heating capacity, from the model submittal.
70-81%
-13F
The worst nights of a northern winter — of rated heating capacity, depending on unit size.
Source: Mitsubishi submittal, MSZ-FS12NA / MUZ-FS12NA (PDF). Checked on October 8, 2026.
The manufacturer’s own family-wide claim is stronger: up to 100% of heating capacity at 5F with operation to -13F, and for the current generation, 100% capacity at -10F and guaranteed operation to -22F. Marketing pages do not say which sizes hit those peaks, so we printed the submittal’s numbers for a specific unit instead.
Source: Mitsubishi Electric, heat pump product pages. Checked on October 8, 2026.
What the states pay for it
A rebate never attaches to a model name alone — it attaches to a unit on a program’s list, installed to the program’s rules. Here is every program we checked, what it pays, and honestly where this model’s qualification is confirmed and where it is not.
$1,000 to $3,000 per outdoor unit
Rebate program open; unit list status unverified
Maine — Efficiency Maine, whole-home rebate
Efficiency Maine pays its per-unit rebate only for single-zone heat pumps, and this is a single-zone unit — the exact shape the program favors. The amount is $1,000 per outdoor unit at any income, $2,000 moderate income, $3,000 low income, with lifetime caps of $3,000 to $9,000 per home. The unit must be on Efficiency Maine’s rebate-eligible list.
An installer source states Mitsubishi Hyper-Heating systems are on that list, but the official list file would not open when we checked, so we cannot confirm this specific model from the source itself.
Source: Efficiency Maine, residential heat pump rebates. Checked on October 8, 2026.
$2,000
Rebate program open; this model’s ratings unverified
Minnesota — Xcel Energy, cold-climate mini-split
Xcel’s $2,000 rebate for a cold-climate mini-split requires 16.0 SEER2, 9.0 EER2 and 9.5 HSPF2 with a Quality Installation, for Combo or natural-gas customers ($1,500 electric-only). We have not yet verified this model’s published ratings against those numbers, so treat the $2,000 as possible, not promised.
Source: Xcel Energy, Minnesota residential rebate summary (PDF). Checked on October 8, 2026.
$375 or $475 instant discount
Open at participating distributors; unit list status unverified
Vermont — Efficiency Vermont, ductless heat pump
An instant discount at participating distributors: $375 for a system of two tons or less, $475 above two tons, plus $600 more for integrated controls. Equipment must be on Efficiency Vermont’s qualifying list, which is built from the NEEP cold-climate list.
Source: Efficiency Vermont, ductless heat pump discounts. Checked on October 8, 2026.
Could not be verified
Not yet verified by us
Its NEEP row
The NEEP cold-climate list standardizes capacity and COP at 5F for every listed unit — the fairest comparison between brands. The list is an interactive application that resisted our checks, so we have not read this model’s row. Its submittal numbers above come from Mitsubishi’s own documents instead.
Its efficiency ratings
We have not verified this unit’s SEER2, EER2 and HSPF2 numbers, so we do not print them. The Xcel rebate in Minnesota turns on those exact figures.
The state equipment lists
Efficiency Maine’s rebate-eligible list file and Efficiency Vermont’s qualifying-products list both resisted our checks on our date, so per-model confirmation for Vermont rests on program rules and installer sources, not the lists themselves.
Source: NEEP, cold-climate air-source heat pump specification and product list. Checked on October 8, 2026.
Where it shows up on quotes
Vermont
The dominant quote: several Vermont installers advertise themselves as Mitsubishi-trained elite contractors, and the state leads New England in heat pumps installed per person.
Maine
Single-zone wall units like this one are the shape Efficiency Maine’s rebate favors, and installer accounts describe Mitsubishi units taking the rebate week after week.
Minnesota
Mitsubishi appears on more than one contractor’s brand list in the Minnesota heat pump collaborative’s directory, alongside Trane, Bosch, Fujitsu and Daikin.
Source: Minnesota ASHP Collaborative, contractor directory. Checked on October 8, 2026.
Compare it against the other quote, with the same numbers for both
Checked on October 8, 2026. Built from the public record, not from opinion. Every model page gets the same structure, so the numbers compare.