Loading NuWatt Energy...
We use your location to provide localized solar offers and incentives.
We serve MA, NH, CT, RI, ME, VT, NJ, PA, and TX
Loading NuWatt Energy...
NuWatt designs, installs, and manages solar, battery, heat pump, and EV charger systems across 9 states. One company, one warranty, one point of contact.
Get a Free QuoteHow many zones does your NH home need? Colonials, Capes, and farmhouses each have different strategies. From a $3,000 single-zone test to a $18,000 whole-home conversion — with NHSaves rebates on every configuration.
$3-5K
1-Zone Cost
$12-18K
4-Zone Cost
$250-1,250/ton
NHSaves Rebate
-22°F
Operates To
All prices are installed costs including equipment, labor, electrical, and standard NH permitting. NHSaves rebates reduce net cost by 10-35%.
9,000-18,000 BTU (0.75-1.5 ton) · Covers 400-750 sq ft · Ideal for: Any — good starting point
Installed Cost
$3,000-5,000
NHSaves Rebate
$190-1,875
Est. Net Cost
$2,800-4,100
Best for: Primary living area OR master bedroom. Test mini-split before committing to whole-home.
Advantages
Limitations
18,000-27,000 BTU (1.5-2.25 ton) · Covers 800-1,500 sq ft · Ideal for: Capes, small Colonials, Ranches
Installed Cost
$6,000-9,000
NHSaves Rebate
$375-2,813
Est. Net Cost
$5,600-7,800
Best for: Living room + master bedroom. Covers the two most-used rooms, ~60% of daily heating/cooling needs.
Advantages
Limitations
27,000-36,000 BTU (2.25-3 ton) · Covers 1,200-2,000 sq ft · Ideal for: Standard Capes, small Colonials, most Ranches
Installed Cost
$9,000-13,000
NHSaves Rebate
$563-3,750
Est. Net Cost
$8,000-11,000
Best for: Near whole-home coverage for smaller homes. Living area + master + office/secondary bedroom.
Advantages
Limitations
36,000-48,000 BTU (3-4 ton) · Covers 1,800-2,800 sq ft · Ideal for: Larger Colonials, multi-story homes
Installed Cost
$12,000-18,000
NHSaves Rebate
$750-5,000
Est. Net Cost
$10,500-15,000
Best for: Full whole-home conversion. Eliminate oil heat entirely (or keep as emergency-only backup).
Advantages
Limitations
Costs are 2026 NH estimates. NHSaves rebates are per system, not per head. Income-eligible households may qualify for enhanced rebates or free installation through NHSaves.
A critical decision: should you use one outdoor unit with multiple heads (multi-zone) or separate systems for each room? Here's the tradeoff:
| Factor | Multi-Zone (1 outdoor unit) | Multiple Single-Zone |
|---|---|---|
| Cost for 3 zones | $9,000-13,000 | $9,000-15,000 |
| Outdoor units | 1 (larger) | 3 separate units |
| Outdoor space needed | Less — one location | More — 3 locations |
| Efficiency per zone | 5-10% less efficient | Maximum efficiency per zone |
| If compressor fails | All zones go down | Only that zone affected |
| Installation complexity | Lower (one outdoor install) | Higher (3 outdoor installs) |
| NH building code | One electrical circuit | One circuit per unit |
| NHSaves rebate | Based on total tons | One rebate per system |
| Noise | 1 louder unit | 3 quieter units |
For most NH homes, a multi-zone system with one outdoor compressor is the best value — lower cost, less outdoor clutter, and simpler installation. The exception: if your home has zones more than 50 feet apart (e.g., a farmhouse with additions), separate single-zone systems may perform better because longer refrigerant lines reduce efficiency.
New Hampshire's housing stock is distinctive. Here's how to zone each common home type for mini-splits:
Typically 1,800-2,500 sq ft, 3-4 bedrooms, no ductwork, oil boiler with radiators.
Zoning strategy: 3-4 zones: First floor living + kitchen open area (1 large head), master bedroom (1), second floor hallway or bedroom (1), optional basement/office (1).
Start with: First floor living area — largest open space, highest usage.
Typically 1,200-1,800 sq ft, 2-3 bedrooms, half-story upstairs. Often poorly insulated knee walls.
Zoning strategy: 2-3 zones: Main floor open plan (1 large head), master bedroom — can be upstairs or down (1), upstairs bedroom if separate (1).
Start with: Main floor — the Cape layout typically has one large open-plan living space.
Typically 1,500-3,000 sq ft, irregular layout, additions over time, no ductwork possible, poor insulation.
Zoning strategy: 3-5 zones: Original section living area (1), kitchen/dining addition (1), master (1), each significant addition or wing (1 each). These homes often need more zones due to disconnected floor plans.
Start with: Kitchen/living area where the family spends most time. Insulation upgrades should happen simultaneously.
Typically 1,000-1,600 sq ft, 2-3 bedrooms. May have existing ductwork.
Zoning strategy: 2-3 zones: Living/great room (1), master bedroom (1), optional second bedroom or den (1). If ductwork exists and is in good condition, consider a ducted system instead.
Start with: Living room — single-story means one head can often cover 60% of the home.
Many NH homeowners prefer a phased approach — start with 1-2 zones, see the savings, then expand. This is smart but comes with tradeoffs:
If you plan to go multi-zone eventually, install a multi-zone outdoor compressor from day one (sized for your eventual total) with just 1-2 indoor heads initially. This costs slightly more upfront ($500-1,000 for the larger compressor) but saves $2,000-4,000 versus buying separate systems later. You can add indoor heads to the existing compressor as budget allows.
If budget is limited, install zones in this priority order for maximum comfort and savings:
Where you spend the most waking hours. Largest open space. Maximum comfort impact. Typically 12,000-18,000 BTU head.
Comfortable sleeping temperature (65-68°F) without running the oil furnace. A 9,000-12,000 BTU head is usually sufficient.
With remote work, this room is used 8+ hours daily. A 9,000 BTU head keeps it comfortable year-round.
Heat rises — upstairs is often too hot in summer, too cold in winter. A head on the second floor landing can serve a hallway and two adjacent rooms.
Lowest priority unless it is a finished living space. Basements stay naturally cool and often have their own baseboard heating.
NHSaves rebates are based on total cooling capacity (in tons), not the number of zones. This means a 3-ton multi-zone system qualifies for the same rebate as a 3-ton single system.
| System Size | Standard ($250/ton) | Enhanced ($1,250/ton) | Typical System |
|---|---|---|---|
| 0.75 ton (9K BTU) | $188 | $938 | Small bedroom |
| 1 ton (12K BTU) | $250 | $1,250 | Single zone - one room |
| 1.5 ton (18K BTU) | $375 | $1,875 | Large single zone |
| 2 ton (24K BTU) | $500 | $2,500 | 2-zone system |
| 3 ton (36K BTU) | $750 | $3,750 | 3-zone system |
| 4 ton (48K BTU) | $1,000 | $5,000 | 4-zone whole-home |
| 5 ton (60K BTU) | $1,250 | $6,250 | Large whole-home (max) |
Full cost breakdown by zone count and brand
They're the same thing — here's the real choice
15-18 years in NH, signs to replace
Which models qualify for 2026 rebates
When ducted makes sense in NH
Operating cost comparison at $0.27/kWh
For a typical 1,500-2,500 sq ft NH home, most homeowners start with 1-2 zones covering the main living area and master bedroom (supplementing existing oil heat), then expand to 3-4 zones for whole-home coverage. A Colonial typically needs 3-4 zones, a Cape Cod needs 2-3, and a Ranch may need only 2-3 zones. The exact number depends on your floor plan, insulation quality, and how much of your oil/propane heating you want to replace.
Starting with a single zone is a smart low-risk approach for NH homeowners. Install one head in your main living area, see the savings, then add zones over time. A single 12,000-18,000 BTU head covering 500-750 sq ft costs $3,000-5,000 before NHSaves rebates. The downside of starting small: adding zones later means multiple installation visits and slightly higher total cost than installing everything at once.
Single-zone: $3,000-5,000 installed. Two-zone: $6,000-9,000. Three-zone: $9,000-13,000. Four-zone or whole-home: $12,000-18,000. Multi-zone systems share one outdoor compressor, so adding zones is incrementally cheaper per zone ($2,500-3,500 per additional indoor head) than installing separate single-zone systems ($3,000-5,000 each). NHSaves rebates of $250-1,250/ton apply to all configurations.
Yes. Modern multi-zone outdoor compressors (Mitsubishi MXZ, Daikin RMXS) are designed to serve 2-5 indoor heads simultaneously. At 0°F, a cold-climate multi-zone unit maintains 75-85% of rated capacity. However, there is a tradeoff: multi-zone compressors are slightly less efficient than single-zone units because they must manage varying demand across zones. In NH, the efficiency penalty is roughly 5-10% compared to dedicated single-zone systems.
Priority order: (1) Main living area — where you spend the most waking hours. (2) Master bedroom — for comfortable sleeping. (3) Home office — increasingly important with remote work. (4) Second floor bedrooms — heat rises, so these are often over-heated in summer and cold in winter with just a wall unit. (5) Basement or bonus room — lowest priority, often supplemental.
NHSaves rebates are based on total cooling capacity in tons, not the number of zones. A 3-ton multi-zone system and a 3-ton single-zone system both qualify for $750 (standard tier) or $3,750 (enhanced tier). However, you get one rebate per system — not per indoor head. The rebate is $250/ton (standard) or $1,250/ton (enhanced, for electric resistance replacement). All systems must use R-32 or R-454B refrigerant.
Get a free zone-by-zone recommendation from a NHSaves-qualified installer. We'll assess your home layout, insulation, and heating goals to recommend the right number of zones.