For heating and air-conditioning installers
Heat-and-cool enquiries you don't share.
Every month we post letters under your name to the best-fit homes in up to 5 postcode districts: big, extended, owner-occupied houses with room for an outdoor unit. This winter the letters lead with heating. Homeowners reply to you, and no other installer on our list writes to your districts while you hold them.
Pilot: 500 letters for £600, one payment · or £149 a month + £0.95 a letter · printing and postage included
The houses we write to
194 m²
average size, against 87 m² for a typical home in England
more rooms to heat and cool
96.5%
detached or semi-detached houses
81% detached, 15% semi
85%
have been extended
recorded on the energy certificate
Never a listed building, never a home that already has a heat pump. 11% already have solar panels; 30% were built since 2000.
Source: the national Energy Performance Certificate register. The top 150 homes in each of the 991 postcode districts we can sell (148,650 homes), measured 5 October 2026, score v2.1.0.
The data
What we know about a house before we write to it
Example record · fictional, no address
Detached house, built 2003–2006, 171 m², one extension
62/ 100
Letter line: 35. Homes below it never get a letter.
Hard to keep comfortable?
Built
2003–2006
EPC7.9 / 12
Rooms in the roof
None recorded
EPC0 / 9
Glazing
Not on newer certificates
EPC0 / 8
A bigger job?
Floor area
171 m²
EPC11.1 / 12
Neighbourhood
Less deprived than 70% of England
IMD 20198.6 / 11
Working from home nearby
38% of workers
Census 20215.8 / 10
Room for an outdoor unit?
Built form
Detached house
EPC12 / 12
Why now?
Certificate for a sale
8 months ago
EPC12 / 12
Extensions
1
EPC4.8 / 8
Solar panels
None
EPC0 / 6
Checked before it scores
- Owner-occupiedEPC
- No heat pump yet: gas boiler and radiatorsEPC
- Not a listed buildingHistoric England
- Not in a conservation or Article 4 areaPlanning data
What we never hold
Names, ages, incomes, phone numbers or emails. We profile the house, not the people in it. Addresses come from Ordnance Survey's licensed address data, are used only to post the letter, and never go to installers.
Where it comes from
- EPCEnergy Performance Certificate register
- IMD 2019English Indices of Deprivation 2019
- Census 2021Census 2021, how people travel to work
- Historic EnglandNational Heritage List for England
- Planning dataplanning.data.gov.uk conservation and Article 4 areas
An energy certificate records why it was made; this one was made to put the house on the market. Certificates made since June 2025 no longer record glazing area, so they score nothing for it. Score v2.1.0; points rounded to one decimal.
Why letters
Winter's quiet. Shared leads don't fill it.
Not shared
One installer per postcode district. A homeowner who replies has ticked a box naming you, and nobody else.
Before they search
Letters reach homeowners who haven't started looking yet, in the districts you choose, in months when few people search for air conditioning.
Nothing to run
No ads to manage, no bidding, no credits. We score the homes, print and post the letters, and pass you the replies.
Your district, right now
Type a postcode district. See if it's open.
Or skip the lookup: tell us your districts and we'll confirm availability by email within one working day.
How it works
Letters under your name. Replies to you.
Step 1: We score every home
Every owner-occupied home in England, from the Energy Performance Certificate register: size, build, extensions, rooms in the roof, glazing, solar. Listed buildings and homes that already have a heat pump are left out. No names, no electoral roll: we profile the house, not the person.
Step 2: You choose up to 5 districts
One installer per postcode district. While you hold a district, nobody else on our list is written to there.
Step 3: You approve, we post
You approve the letter and your first batch. Then we post one-page letters under your name to the best-scoring homes, addressed to “The Homeowner”, with your phone number, a QR code and a short reply link.
Step 4: Replies come to you
A homeowner who replies leaves their name, number and best time to call, and ticks a box agreeing to hear from you. You never get the address list.
Sample letter
This is what lands on the doormat
A detached house built since 2000. From October to March the letter leads with heating; from April it leads with cooling. The facts about the house come from its energy certificate, never from anything about the people in it.
- Your name, phone number and website at the top; your sign-off at the bottom.
- One sentence about the house: its type, its age, an extension, rooms in the roof, solar.
- A careful line on planning: heat-and-cool systems are usually permitted development, cooling-only units are not.
- A QR code, your phone number and a short link. One scan opens a reply page in your name.
- Marked as marketing, with a data-source line and an opt-out, as the rules require.
The installer on it, Bramwell Air Comfort (a fictional demo installer), is invented, and so are the address and phone numbers. Everything else is what our system prints.
Open the letter full sizePricing
Start with a pilot. Carry on monthly if it works.
Pilot
£600one payment
500 letters to the best-fit homes in your districts. Nothing renews.
- 500 one-page letters under your name, printed and posted
- Up to 5 postcode districts, yours alone until 60 days after the last letter
- Posted in monthly batches of up to 150 per district
- You approve the letter before anything is posted
- A 10% control group, so you see the real response
- First letters posted within 2 weeks of payment, or your money back
Monthly
£149per month
For a pack of up to 5 postcode districts, plus £0.95 per letter sent, print and postage included.
- Up to 150 letters per district a month, £0.95 each, printed and posted
- Your districts are yours alone while you subscribe
- Month to month: cancel any time
- The same letters, reply page and control group as the pilot
The terms, in plain words
- One installer per district
- While you hold a district, nobody else on our list is written to there.
- Paying is what holds a district
- A request doesn't hold anything. We confirm availability by email within one working day, then send a payment link.
- Your money back if we're late
- Your first letters are posted within 2 weeks of payment, or we refund you in full.
- Nothing renews by itself
- The pilot is one payment. Afterwards you carry on monthly, or stop.
- You never hold the address list
- You get the replies. The addresses stay with us, which keeps it legal for both of us.
- What a job is worth
- A printed, posted letter costs under a pound. A heat-and-cool installation is worth thousands.
FAQ
Questions installers ask us
What response do you get?
We haven't posted a campaign yet, so we don't quote one. Every batch keeps 10% of the chosen homes unmailed as a control group, so you see the real figure for your own districts.
Checkatrade or Google is cheaper per lead. Why this?
Per lead, they may well be. These enquiries aren't shared with other firms, they come from homeowners who weren't searching yet, they keep coming in the quiet months, and there's nothing for you to run. Keep the channels that work for you and add this one.
Can I have the addresses?
No. You get the people who replied and agreed to hear from you: their name, phone number and best time to call. Keeping the addresses with us is what keeps this legal for both of us.
What about planning permission?
A heat-and-cool system is usually permitted development; a cooling-only unit normally needs an application. Flats and conservation areas have extra limits, and we never write to listed buildings. The letter tells homeowners to check with their council, and so should you.
Where does the data come from, and is this allowed?
From the national Energy Performance Certificate register and other public property records. We hold no names and use no electoral roll: every letter goes to “The Homeowner”. Post is outside the electronic-marketing rules; we write on the basis of legitimate interests, screen every mailing against the Mailing Preference Service, and anyone who asks us to stop is never written to again.
I'm a heating firm. Is this for me?
If you hold F-Gas certification and fit air-to-air systems, yes. We check your certificate before your first letter. We don't sell boiler or water-based heat pump leads.
When would my first letters go out?
Within 2 weeks of payment, or you get your money back. We're finishing our address licence and registration now. You approve the letter and your first batch before anything is posted.
Get started
Tell us your districts
Name up to 5 postcode districts and how to reach you. We'll check availability and confirm by email within one working day. If one is already held, or doesn't have enough homes on our list, we'll say so and suggest nearby districts that do.
Then we send a payment link for the pilot, or for the monthly plan if you'd rather start there (say so in the notes). A request doesn't hold a district; paying does.
One installer per district. See if yours is open.
Check a district, or ask for a pilot: 500 letters for £600, one payment, nothing renews.