Fair questions

Both. What most people call air conditioning is an air-to-air heat pump: the same unit cools a room in summer and heats it in winter, by moving heat rather than making it. Every system we fit is set up for both, and we show you heating mode at handover.

Often not for a house, but it depends, so we never assume. In England, heat pumps can usually go in under permitted development when the outdoor unit meets size and siting rules and a noise limit for your neighbours, and the system isn't used only for cooling. Flats, listed buildings, conservation areas and Article 4 areas need extra checks. We check your home at the survey and tell you in your proposal.

One room starts from about £1,795 installed, and four rooms in a typical three-bed home from about £5,675, depending on rooms and pipe routes. We're not VAT registered, so there's no VAT to add to our prices. Your online price is for your home, and it's confirmed at your survey.

It's calculated from your answers, and every quote shows how confident we are in it. Photos make it more accurate. It's confirmed at your home survey: if the survey finds something your answers didn't show (an extra room, a fuse board that needs work), your proposal says exactly what changed and why, before you agree to anything.

A surveyor visits (free, about 90 minutes) to measure each room, check where the indoor and outdoor units could go and how the pipes would run, and look at your fuse board. Then we design your system and send a proposal with the price in writing. There's no obligation.

That depends on your tariff, your home and how you use it, so we won't promise a number. As a rule of thumb, a heat pump gives out three or more units of heat for each unit of electricity it uses, which is why it heats far more cheaply than a plug-in electric heater. Manufacturers publish this as SCOP (heating) and SEER (cooling), and your proposal names the exact units so you can check their figures.

Indoor units are very quiet on their lowest setting: the models we're looking at are rated from about 19 dB(A), roughly a whisper, though it varies by model and size. The outdoor unit is louder, so its position matters. We check it against the noise limit for your neighbours at the survey.

Up to three days for most homes, and your proposal gives the plan for yours. Expect the power to be off for up to 30 minutes while the new circuit is connected. Before we leave, the system is tested and commissioned in heating and cooling, and you get your paperwork.

Refrigerant work legally needs F-gas certified engineers, and the new electrical circuit needs a registered electrician. Before your install you'll see who's coming and the qualifications they actually hold.

Your proposal sets out exactly which warranties apply, in writing, before you agree to anything. All of this is on top of your statutory rights, not instead of them.

Getting a price costs nothing, and so does the survey. No deposit. We invoice the balance once the installation is finished. It's due within 7 days of our invoice. You can pay by bank transfer or card. We don't offer finance at the moment.

Yes. Once you accept, you can cancel without giving a reason until 14 days after the day your equipment is delivered to you. If you'd like us to start sooner, you can ask us to, in writing. Our terms explain it in full.

If you rent, yes: you'll need your landlord's written consent. If you own a leasehold flat, your lease usually needs the freeholder's consent for the outdoor unit. Your surveyor asks who owns the home, and nothing is drilled until we have that written permission on file. We can give you the technical details consent requests usually ask for.

We're starting with CR0, CR2, CR4, CR7, CR8, E3, SE19, SE25, SE27, SW2, SW4, SW11, SW12, SW16, SW17, SW18 and SW19. Put your postcode in and we'll tell you straight away. If we're not there yet, you can ask us to email you once when we are.