New startup ideas · Physical world · Climate and energy
startup idea
Elastherm
A solid-state heat pump with no refrigerant that any electrician can install.
Elastherm builds a home heat pump around solid-state elastocaloric cores instead of compressed refrigerant, so installation needs no certified refrigerant handler, no lineset, and no permit-heavy outdoor unit.
- Hardware
- Consumer
- $100B+ market
- Collapses a cost 10x
- US first
3/5
venture judge
1
similar startups, last 2 years (23 all-time)
93%
of 1 nearest real companies still alive
yes
8 matching federal grants and programs
Direction supported by government programs and grants
Test it before you build it
$1,200 · 3 weeks · 30 prospects
For $1,200 in 3 weeks, prove that electric-baseboard households will put down refundable money for a refrigerant-free room heat pump and that licensed electricians will sign on to install it.
Riskiest assumption · Homeowners with electric baseboard heat will pay a deposit today for a $2,900 electrician-installed, refrigerant-free room unit delivered in over a year, rather than buying an existing mini-split now - if the install-labor pain is not worth real money to them, the whole cost-collapse thesis dies before the materials do.
1Focus group: who and where
Owner of a 1960s-90s home heated by electric resistance baseboard in Maine, Vermont, or New Hampshire, who paid $350-500 a month last winter and has already balked at a $4,000-plus mini-split quote; secondarily, the licensed electrician who would install the unit.
where to find 30 · Front Porch Forum neighborhood posts across Vermont (community); Zillow and Redfin listings filtered by 'electric baseboard' heating to find dense towns in Maine and Vermont, then Nextdoor posts in those towns (list plus channel); r/heatpumps and r/Maine (community); Efficiency Maine's Registered Vendor list and the NECA Northeastern Line Constructors chapter to reach 20 licensed electricians (directory).
2Sell first, build later
A single-room heat pump replacing electric baseboard: no refrigerant, no outdoor unit, no ductwork, installed by a licensed electrician in one afternoon, cutting that room's heating cost roughly in half, first installs winter 2027 in Vermont and Maine.
the ask · $2,900 installed per room unit, reserved today with a $250 refundable deposit
a real yes · A real yes is a completed $250 reservation payment or an electrician's signed dated LOI for 10 installs; forum upvotes, 'I'd buy that' comments, and requests to be notified at launch are not yes.
3Small experiments
The first one attacks the riskiest assumption; each ends with a number that says whether to run the next.
1. Priced reservation page test
$700 · 14 days
Put up a one-page site: refrigerant-free room heat pump, $2,900 installed by a licensed electrician, winter 2027 delivery, $250 fully refundable reservation. Drive traffic with free Front Porch Forum and Nextdoor posts in baseboard-dense Vermont and Maine towns plus $550 of Meta ads geo-targeted there. One founder answers every reply personally.
keep going if · 8 or more $250 reservations from the first 300 visitors (about a 3% take rate)
2. Electrician install-channel LOIs
$150 · 10 days
Call 20 licensed electricians pulled from the Efficiency Maine Registered Vendor list and the NECA chapter roster. Pitch: a heat pump they can legally install without an EPA 608 refrigerant card, $500 labor per afternoon install, first 10 units in their territory. Ask each to sign a one-page dated LOI to install the first cohort.
keep going if · 5 of 20 electricians sign a dated LOI for 10 or more installs
3. Mini-split loser interviews
$350 · 14 days
Recruit 15 homeowners who got a mini-split or heat pump quote in the last two years and did not buy, via the same forums, offering a $20 gift card for a 25-minute call. Ask what killed the purchase: price, contractor hassle, outdoor unit, permits. Tally the stated blockers.
keep going if · 8 of 15 name install cost or contractor logistics, not equipment price, as the blocker
4Collect a deposit up front
Tesla took $1,000 refundable reservations for the Model 3 and $100 for the Cybertruck before building either: the deposit is the measurement, not the revenue.
$250
per prospect, refundable
how · A refundable $250 pre-order with a stated delivery window, taken at checkout on the reservation page - the standard instrument for a consumer hardware buyer, and the only one that separates bill-payers in pain from heat pump hobbyists. The homeowner completes checkout; the electrician signs the install LOI. set up: Stripe Checkout ↗
what it reserves · One of the first 100 install slots for winter 2027-28 and a locked $2,900 installed price
refund · Fully refundable any time for any reason with two clicks, and refunded automatically if the install window slips more than 90 days.
target · 12 reservations from roughly 300 page visitors and 25 direct conversations within 21 days
Go: build it if
12 or more $250 reservations, 5 or more signed electrician LOIs, and a majority of interviews naming install cost as the blocker: the channel and the buyer exist, so the materials bet is worth funding.
Kill: stop if
Fewer than 4 reservations from 300-plus visitors and fewer than 2 electrician LOIs: even the best-case baseboard household will not pre-commit, so demand does not justify years of elastocaloric R&D.
5 Scripts to run itoutreach message, landing copy, deposit terms · click to open
outreach message
If your house heats with electric baseboard, you probably paid $400 or more a month last winter and got quoted $4,000-plus for a mini-split you never bought. I'm building a room heat pump a licensed electrician installs in one afternoon: no refrigerant, no outdoor unit, targeting $2,900 installed and about half the running cost of baseboard. I'm picking 12 Vermont and Maine homes for the first installs. Can I get 20 minutes this week to hear how you heat now?
landing page
Cut your baseboard heating bill in half. No ducts. No refrigerant. $2,900 installed per room, reserved today with $250, fully refundable. Reserve your winter 2027 install slot.
deposit terms
Your $250 reserves one of the first 100 installation slots for winter 2027-28 and locks the $2,900 installed price. It is fully refundable, any time, for any reason, with two clicks. If we miss your install window by more than 90 days, we refund you automatically.
Would you run this test?
One tap. The yes-share feeds the Demand pillar of this idea's score; nobody sees who answered.
Budgets are out-of-pocket estimates for a team of one to three, US market. Size the deposit to the deal, and check the terms before taking money in a regulated line.
Scorecard
One score that balances how trendy the idea is, the demand for it and its potential for 100x, with competition measured relative to every other idea in the catalog. Recent startup trends first, government priorities second.
50
Idea Score, 0-100 · raw 31.4 x 1.61
Active
competition: more crowded than 47% of ideas · headwind x0.76
+2.2
government priorities, secondary (7 matching grants)
Trend
25
Is the wave forming now? 2025-26 entrants vs 2023-24, rounds since 2025, the sector's live-batch direction, the 2026 trend analyst.
- Entrants 2025-26 vs 2023-24 (similar companies)2
- Rounds announced 2025+ in the sector47
- Sector direction (live batch)50
- 2026 trend analyst0
Demand
33
Does anyone want it? YC's current RFS, companies already paid for something similar, the operator judge, founders' yes-rate in decks, readers who would run the test.
- YC asks for it (current RFS: idea / sector)0
- Someone already pays (similar companies, recent / all-time)100
- Operator judge: real pain0
100x potential
68
Can it return a fund? The venture judge (double weight), market-size and moat axes, neighbours still alive, the technologist judge.
- Venture judge50
- Market size axis100
- Moat axis100
- Neighbours still alive30
- Technologist judge75
Score = 100 x cbrt(Trend x Demand x 100x) x (1 - 0.5 x crowding) + government bonus (max 5), calibrated so the 95th-percentile idea scores 90 (order never changes). A geometric mean: a weak pillar cannot be papered over. Percentiles are among the 272 ideas in the catalog; the terms matched were solid-state, heat, pump, refrigerant, electrician, install, builds, home.
The idea in full
- What
- Elastherm builds a home heat pump around solid-state elastocaloric cores instead of compressed refrigerant, so installation needs no certified refrigerant handler, no lineset, and no permit-heavy outdoor unit. HVAC contractors and electricians sell and mount it in an afternoon, collapsing the installed cost of switching a home off gas by an order of magnitude. Every unit ships enrolled in a demand-response fleet whose ML scheduler earns grid payments that offset the owner's bill.
- Why now
- EQUIUM in the PnP 2026 batch is commercializing thermoacoustic heat pumps for buildings, showing investors now back non-vapor-compression heating, and the 2024 cohort's 170 new climate companies included no one attacking the residential install-labor cost that keeps heat pump adoption flat.
- Wedge: first customer and entry point
- US electrical contractors in cold-climate states, seeded with a single-room replacement unit for electric-resistance baseboard homes where the operating-cost win is largest.
- Path to 100x
- Residential heating and cooling replacement is a $100B+ global market, and removing refrigerant collapses the install labor and permitting cost that today doubles or triples system price, the same cost wall that keeps gas furnaces in place. The moat compounds through the fleet: as neighborhood density of enrolled units grows, per-unit grid payments rise, so each installed Elastherm makes the next one cheaper to own in that territory, a network advantage no single-unit HVAC maker can copy.
- Ceiling
- Incumbent HVAC giants can bundle conventional heat pumps with financing through the same contractor channels, holding Elastherm to the premium retrofit niche if the solid-state cost curve stalls.
- Closest real companies, as the generator saw them
- EQUIUM uses thermoacoustics and targets the building sector through commercial channels; Elastherm targets homes through electrician channels with an elastocaloric core and a fleet revenue layer that EQUIUM does not have.
- Main risk
- Elastocaloric materials fail to reach compressor-level efficiency and durability at consumer price points after years of R&D.
Five judges
Each judge scores every idea in the catalog with a named rubric; the venture judge decides whether a card is shown at all (4-5 is venture-grade).
Venture investor
3/5
Elastocaloric cores plus a demand-response fleet is a genuine power-law swing at a $100B+ market, gated on materials hitting compressor-level durability.
Bootstrapper
1/5
Elastocaloric cores needing years of materials R&D before a single install is deep-tech capital a two-person team cannot cover.
Operator
1/5
Elastocaloric cores must first beat compressors on efficiency and durability, so this is a materials bet before it is a business.
Technologist
4/5
Elastocaloric cores are deep materials work where expertise compounds, discounted because compressor-level durability at consumer price points does not yet exist.
Risk
2/5
Everything depends on elastocaloric cores hitting compressor-level efficiency, a materials bet with no fallback after years of R&D.
trends
1/5
Elastocaloric cores with revenue after three-plus years of R&D have no 2026 dependency - this pitch read identically in 2023.
Similar startups in the directory
Companies whose pitch matches most of the idea's terms (solid-state, heat, pump, refrigerant, electrician, install, builds, home): 23 all-time, 1 from the last two years. Same matching as Idea Check.
autarc is the agentic OS for energy installers.
Tech-enabled heat pump contractor that cuts costs by 60%
Spruce is building an agentic operating system for heating installers.
Qeeper is building a home services platform that homeowners and property managers love.
Home electrification at $0 upfront cost
Clean Energy Partner for homeowners.
Humanoid robots that do your chores for the price of an iPhone!
GeyserSteam™ | Premium Home Steam Room & Sauna Systems
The autopilot for home energy
Go Electric without an Electric Panel Upgrade | Stepwise
Home - Propellane
Solid-state heating and cooling systems at a building scale
The generator's reference companies
Real companies the model named as closest when it wrote the card, with their fate. A check mark is a company the radar could verify in its directory.
Public money in this direction
US federal grants, SBIR/STTR awards and open opportunities from the radar's public-money feed, matched to the idea's terms; the sector totals give the context.
8
grants and programs matching the idea
203
startup-relevant grants in Climate and energy
$167M
awarded in the sector, tracked
13
opportunities open now in the sector
- I-Corps: Translation Potential of a Longitudinal Diagnostic Method for Residential Branch Circuits Serving Sustained High Impact Electrical Loadsawardhigh relevance
National Science Foundation · I-Corps · $50K · posted 2026-08-19
- SBIR Phase II: Solid-State Heating and Cooling System Using High-Performance Thermoelectric Materialsawardhigh relevance
National Science Foundation · SBIR Phase II · $1M · posted 2026-07-28
- Optimization of an at-home continuous multi-domain monitoring and assessment system to improve Alzheimer's and related disorders clinicaltrialsawardhigh relevance
NIH / NIA · SBIR phase II · $964K · posted 2026-09-07
- DEVELOPMENT & TESTING OF A NOVEL THERAPEUTIC DEVICE FOR IMPROVING MOBILITY IN PATIENTS WITH LOWER-EXTREMITY PERIPHERAL ARTERY DISEASEawardhigh relevance
NIH / NHLBI · SBIR phase II · $1M · posted 2026-08-01
- METAVEST: Advanced Biomimetic Personal Cooling for Enhancing Heat Safety Among High-Risk Workersawardhigh relevance
NIH / NIOSH · SBIR phase I · $302K · posted 2025-09-30
- Development and Feasibility Testing of PrivyPod - a modular bathroom to support aging in placeawardhigh relevance
NIH / NIA · STTR phase I · $398K · posted 2025-08-01
- FIRE-WUI: Investigating Potential Solutions to Reduce Wildfire Risk Through Structural Hardeningawardmedium relevance
National Science Foundation · Fire Science Innovations · $1M · posted 2026-09-01
- Collaborative Research: Enabling Safe and Efficient Restoration of Drinking Water Systems through Multiphase Flow Modeling and Controlawardmedium relevance
National Science Foundation · ISP-Infrastructre Systms & Ppl · $316K · posted 2026-07-31
Market signal
What the radar sees in Climate and energy: new companies by cohort year, the forming YC batch, and outcomes since the February snapshot.
Climate and energy · 99 → 115 → 200 → 90 → 45 new companies 2022 → 2026 · 89% aliveYC F26 live: 1 in this cluster, 1% of the batch (was 1% in S26)Since February, of 118 YC companies here: 1 acquired, 2 shut down, 9 rewrote their pitch
Design attributes
The card is one cell of a designed set: every axis below was chosen before the text was written, and the text had to realize it.
- Buyer
- Consumer
- Business model
- Hardware
- Path to 100x
- Collapses a cost 10x
- Market size
- $100B+ market
- Capital intensity
- Capital-medium (ops, field teams)
- Speed to revenue
- R&D first, revenue after 3 years
- Technical depth
- Deep tech: ML, hardware, bio
- Go-to-market
- Partners and channels
- Moat
- Network effects
- Geography
- US first
- Regulation
- Some regulation
- Vibe
- Boring business
Listed under
An idea sits in its own sector and in any sector its text clearly touches.
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