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One Gas + OKGas

One Gas + OKGas

A combined rate designed with you in mind. Gas and maintenance to keep your installation and equipment in perfect condition.


Your gas at Endesa's best online price

  • One Gas price for a variable term: €0.058500/kWh.

  • OKGas now with 50% discount (€5.74/month for the first year for contracting online) 11,48 €/mes.

CONTRACTservicio See conditions

Best gas offer with maintenance of the gas installation, boiler and heating systems for contracting online.

One Gas

All the administration is 100% online, so you can check your bills, your contracts and your other procedures both on our website and on our App.

Endesa's best online price

Rate 3.1

  • Fixed Term Price:  €4,25/month.
  • Variable Term Price:  €0,058500/kWh.

Rate 3.2

  • Fixed Term Price: €8,45/month.
  • Variable Term Price: €0,050760/kWh.
OK Gas

Maintenance of your gas installation, boiler and heating system.

  • Initial diagnosis, annual inspections and unlimited repairs

  • Urgent repairs in less than 3 hours

  • Transportation and 3 hours of labour included for each repair

  • Free phone, 24 hours a day, 365 days a year

  • The cost of the IPO is included if you have your gas supply contract with Endesa

  • With a 50% discount during the first year: €5.74/month

What is OKGas?

OKGas is the maintenance and repair service for Endesa gas and boiler installations.

What does OKGas include?

The service includes an initial diagnosis of your gas installation and heating system (boiler, hydraulic circuit and radiators), an annual review to anticipate possible breakdowns that may increase your energy consumption. OKGas keeps the installation secure, extends the life of the equipment and reduces the breakdowns to 1/3, optimizing the consumption of gas and, consequently, the amount of your invoice.

Whenever you have any incident, you can contact OKGas Technical Service and a technician will visit your home in less than 3 hours to repair the breakdown (displacement and the first 3 hours of labour are free). OKGas's customers have a free phone to request assistance, operating 24 hours a day, 365 days a year: 900 85 86 85. The amount of repairs is unlimited.

OKGas must comply with the current regulations regarding gas installations (R.D. 919/2006) and thermal installations in buildings (R.D. 1027/2007) which require by law a revision of the gas installation and equipment every two years. Furthermore, the OKGas service includes the cost of compulsory periodic inspection of the required gas installation every 5 years, as long as the gas is contracted with Endesa Energía.

Why am I interested in contracting OKGas?

Other services only cover the boiler and not the gas installation, or only cover the maintenance and not the repairs. OKGas takes care of everything.

OKGas covers the cost of compulsory periodic inspection, valued at approximately €60.

You can pay OKGas in comfortable instalments on the gas bill and with a 50% discount during the first year.

You have a professional from the Endesa network, backed by rigorous quality controls, who will repair the breakdowns that occur, as well as flexibility when arranging the visit. Furthermore, the amount of repairs is unlimited.

This avoids any cost for displacement and the first 3 hours of labour per intervention (the Customer is in charge of parts, in case a repair of the gas installation or the heating equipment-boiler, hydraulic circuit and radiators-) is necessary. In rare circumstances, where the repair time exceeds 3 hours, we commit to deliver a free pre-budget.

What makes an annual inspection of your household gas facility necessary?

Inspections of the installations mainly prevent possible gas leaks that affect the security of the inhabitants of the dwelling and, in addition, would mean an increase in the consumption of energy and the amount of your gas bills.

What is the annual revision?

The technical visit takes place:

  • Revision of all the elements of the installation (keys, fasteners, pipes, nozzles, ventilation,...).
  • Adjustments necessary to ensure the safety of the system and to reduce the gas consumption, breakdowns or future failures of the equipment to the maximum.
  • Check the water tightness of the gas system.
  • Check and adjust the operation of the equipment.
  • Combustion analysis and delivery of the result.
  • The compulsory periodic inspection of the gas system.
  • Mandatory review by RITE.

What is the hydraulic heating circuit and why is it necessary to revise it and contemplate repairs?

The heating circuit is the system of hot water pipes leading from the boiler to each of the radiators. The most common faults are: the pump that drives the circulation of the water, the safety valve, the pressure of the circuit, the smoke outlet of the boiler, the temperature probe that checks if the water is hot or the valves of the radiators.

What is the One Gas Tariff?

With the One Gas Tariff from Endesa you will have a fixed price and will be able to manage everything you need online. You will always have a competitive price, not only during the first year. We are offering you Endesa’s best online price.

  • One Gas is a 100% online tariff, which will enable you to carry out all your processes in an easy and simple manner, 24 hours per day, in the "Customer Area" section on the online office or by downloading our mobile application.
  • You can simply sign up for what you need, without having to subscribe to additional services but with the possibility of doing so if you wish.
  • There is no minimum commitment period.
  • You will receive an email indicating the date and the link via which you will be able to access your electronic bill as soon as it is available.
  • A simple, easy and cost-free way of contracting the service and without any supply interruptions.
  • This is a tariff for ALL customers, both new and existing customers.

What are the advantages of the One Tariff?

  • You will enjoy Endesa’s best online price.
  • You will be able to carry out all your processes entirely online.
  • No minimum commitment period.

The One Gas Tariff is valid for supplies with an access tariff of 3.1 or 3.2.


What is the signing-up process for the One Gas Tariff?

Signing-up for the Endesa One Gas Tariff is very easy. You can start your signing-up process from our catalogue of products, through campaigns or promotions, from the product comparison, or from your “Customer Area”.

Your online sign-up in 3 steps:

  • Chose the One Gas Tariff.
  • Check the general and particular conditions of signing-up.
  • Access and then fill in the fields of the corresponding online signing-up form.

We will explain the signing-up process step by step:

“Your details”: let us get to know you in order to offer you the best possible service. Provide us with your personal details and correspondence address.

If you are already an Endesa customer, and if you wish to, we can recover your details. This way the online signing-up process will be easier.

“Your supply” in this step you should let us know:

  • Which is your reseller company.
  • Your CUPS number or the supply point address.
  • If you are not the title holder of the contract, it is not a problem, when signing-up we will change the title holder.

Your order summary: you can view a summary of the products you are signing-up for.

Your payment details: add the bank account from which you wish to pay your bills. If we do not have the bank account you give on record, we will attach a direct debit order.

Your confirmation: all of the details that you provided us with will be shown. You can follow your signing-up process via Mi Endesa.

Once you have signed-up, you will be able to consult your request in detail, we will inform you of the contract number and we will send you an email to the address you have provided from which you can download the general and specific conditions that you have previously accepted.

By signing-up online the electronic billing service is automatically activated, and you will begin to enjoy the benefits. If you would like to find out more, click on electronic billing.


How does the price of my One Gas Tariff contract change?

The price of my One Gas Tariff contract will be able to be updated on the 1st of January after signing-up with the real CPI value (latest general interannual Consumer Price Index officially published at the time of the update), as well as through fluctuations that the current regulated components undergo regarding gas supplies, as well as with possible new changes that can be approved.

Should there be any modifications in the price of your contract, either an increase or a decrease, they will be transmitted to the customer, This type of modification is regulated and is completely out of Endesa’s control, as it is also applied across the whole country and to all companies.

Additionally, it is possible to review the price one year after signing-up. This will happen in either April or October each year. Should there be any changes we will inform you one month in advance. Remember that you can at any time terminate the contract, sign-up for another Endesa tariff or a tariff from another company.


What are the regulated components?

This is a part of the price that you pay for the fixed term and for consumption on your gas bill. This amount mainly goes to the maintenance of the infrastructure that allows the gas to reach your home.

This part of the price is set by the government and it is the same for all companies across the whole country.

They are normally updated by being published in the Spanish State Gazette (BOE) once a year, although on occasion this could happen at other times.

The rental prices of the measuring and control equipment (meter), hydrocarbons, VAT, IGIC (Canary Islands) etc. are also regulated.

When a change in any of the regulated components occurs, the company normally transmits this to the customer, whether it is an increase or a decrease.


Is there an obligation to a minimum commitment period if I sign-up for the One Gas Tariff?

No. You can choose the best offer for you at any time, and if you are not convinced, you can change it whenever you want. With the Endesa One Tariffs there is no minimum commitment period.


I have another tariff with Endesa, can I change to the One Gas Tariff?

If you have a different tariff to the One Gas Tariff, you can change to the One Gas Tariff without any problems. However, if you already have the One Gas Tariff, you cannot leave to sign-up for it again.


How long does the One Gas Tariff last?

The One Gas Tariff has no minimum commitment period: you can leave whenever you want, at no cost. Even so, the One Gas Tariff contract has a duration of one year, and is automatically renewable.


What can I sign-up for with the One Gas Tariff?

You can combine your One Gas Tariff with other products or services according to your needs. If you are interested in the services that we offer, you can consult them via the following links:



Sign up now for One Gas + OKGas

If you sign up now for One Gas + OKGas you may save on your rate


General conditions

By subscribing to this new contract you accept the start of the supply contracted during the cancellation period.