Checkmark Ltd

Enabling DIY heat pump & air-conditioner installs.

30 The Chase, Bromley, BR1 3DF Directions

   Closed today Open Monday 09:00 - 17:00

Why Choose Us?

Quality Service
Professional Service
Personal Service

Business overview

We help people looking to install their own (DIY) heat pumps and air-conditioners. Our connecting, testing, commissioning and certifying service provides a safe and legal install.

Checkmark’s main service is to help Do It Yourself (DIY) installers of heat pumps and air-conditioners be legal and safe by offering an F-gas connection, testing and commissioning service.

This approach saves the cost of a full commercial installation, or the purchase of specialist equipment and tools.

Checkmark are fully F-gas qualified and certified. We do other air-con and heat pump work too.

Products & Services

Air Conditioners

Air Conditioning Engineers

Air Conditioning Filters

Air Conditioning Repairs

Heat pump installation

Heat pumps



DIY air-conditioning

DIY heat pumps



  • F Gas Certificate


  • F-Gas and ODS Regulations: Category I, Level 2 Award (City and Guilds of London Institute)


Air Conditioning Install

Did an excellent job on air conditioning install at a very reasonable price. Would definitely recommend.
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Very happy - good service

Installed my new air conditioner. Very happy with the service - he was very helpful, explained everything and made sure everything worked well. Recommended.
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Professional service!

Very happy with Checkmark's service. Arrived as agreed and made sure my system was connected and set up professionally.
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