The Honest Comparison

Smart Plus vs The National Suppliers

Big national suppliers come with big restrictions. Here's what you actually get when you compare the small print.

What matters Smart Plus Heating National Suppliers
Rooms covered No limit Capped at 5 rooms
Ground & first floor only Any floor, any property Above first floor not covered
Commercial properties Fully covered Residential only
Brand choice Panasonic, Samsung, Daikin, Mitsubishi Electric, Bosch and more Limited to one recommended range
Who installs it Our own F-Gas qualified engineers Outsourced installation partners
Getting a quote Free home survey, real person, fixed price Online estimate, video call if needed
Direct contact Call or WhatsApp us directly Call centre routing
Guarantee Manufacturer guarantee, registered for you Manufacturer guarantee, registered for you
Get It Right First Time

What Size Aircon Do You Need?

Air conditioning output is measured in kW. The higher the rating, the more cooling and heating power the unit provides. Get the size wrong and you'll either pay for power you don't need, or end up with a unit that struggles to keep the room comfortable.

Room size is the starting point, but sunlight exposure, ceiling height, insulation and how many people typically use the room all affect the right kW rating for your space. Our free home survey covers all of this properly, room by room, rather than relying on a generic online calculator.

Below is a rough guide to get you started. We'll confirm the exact spec during your free survey.

Room sizeTypical outputExample room
Up to 20m²2.5kWSingle bedroom, home office
20-35m²3.5kWLarge bedroom, small lounge
35-50m²5.0kWOpen-plan lounge/diner
50-70m²7.0kWLarge open-plan space
Multi-roomMulti-split systemWhole floor or whole house
How The System Works

Indoor & Outdoor Units

Every air conditioning installation uses two connected units working together, one inside the room and one outside your property. Here's what each one actually does.

Internal air conditioning unit

Internal Unit

  • Indoor units let you set the perfect temperature for each room.
  • Filters purify the air as it circulates, removing dust and allergens.
  • Add the Wi-Fi option to control everything from your phone.
  • Runs quietly enough for bedrooms and home offices, with sleep and timer modes as standard.
External air conditioning unit

External Unit

  • The outside unit gently moves heat out of your home in summer.
  • It can also supply warm air in the winter, helping to heat your home.
  • Modern compressors run quietly, so it won't disturb neighbours or outdoor spaces.
  • One outdoor unit can power several indoor units at once with a multi-split system.
Common Questions

Air Conditioning FAQs

Yes. Modern air conditioning systems reverse the process to provide efficient on-demand heating in winter as well as cooling in summer, so you get year-round comfort from one system.
No. Unlike some national suppliers who cap installations at five rooms, we design multi-split systems to cover as many rooms as your property needs, including whole-house and commercial installations.
Yes. We install air conditioning throughout properties of any height, subject to a site survey and safe access for the outdoor unit.
Our systems run quietly and are suitable for bedrooms, home offices and living spaces. Many of the models we install have ultra-quiet modes producing noise comparable to a ticking watch.
Most home installations don't need planning permission. Flats, listed buildings, conservation areas, or outdoor units at the front of the property can be exceptions. We'll check this for you as part of your free survey.
Yes. We install and service air conditioning for offices, shops, restaurants and other commercial premises, not just residential homes.
Yes. All our installations include the manufacturer's guarantee, which we register on your behalf. Annual servicing keeps the guarantee valid.
Yes, we recommend annual servicing to keep your system running efficiently and to maintain the manufacturer's guarantee. We offer aftercare plans to make this easy.

Ready For Your Free Survey?

No call centres, no room limits, no online guesswork. Speak to a real engineer and get a fixed-price quote for your home or business.

Call 01322 474990 WhatsApp Us

Contact Information

Our friendly team is available to answer your questions and provide expert advice on all your heating and air conditioning needs.

Phone

01322 474 990

Mon-Fri: 8:00 AM - 6:00 PM

Email

info@smartplusheating.com

We reply within 24 hours

Office Address

The Bridge Nucleus

Brunel Way

Dartford, DA1 5GA