Before winter: get your boiler serviced
Dereli Teknik Combi boiler service

In İzmit and Kocaeli

Combi boiler installation

New combi boiler installation, moving a boiler, and room thermostat installation. We make the flue and pipe connections in line with regulations.

İlhan speaks only Turkish. Write to us in English on WhatsApp: he reads your message and replies with a translation app.

What we do

  • New boiler installation

    Removing the old boiler, fitting the new one, and making the flue and pipe connections in line with regulations.

  • Moving a boiler

    If you want the boiler moved to another place in the house, we make the connections in the new place and hand the boiler over working.

  • Room thermostat installation

    Connecting a wired or wireless room thermostat to the boiler and setting it up. When the house reaches the temperature you want, the boiler stops and doesn't waste gas.

    Saving gas

Buying a new boiler? Message us first

Let's work out together the right capacity for the size of your home and how you use it. A boiler that is too big or too small burns more gas and doesn't heat the house comfortably.

Ask us on WhatsApp

What our customers say

  • Ömerkörfez · September 2026

    Hızlı ve kusursuz bir işçilik . Geç saatte başıma gelen arızaya saat farketmeksizin yetişen mükemmel bir usta samimi ve iyi yaklaşımlarıyla hem müşteri hizmeti hem iş hizmeti olarak 10/10 . Çok memnun kaldık Dereli teknik 💯

  • İbrahim KaplanKartepe · September 2026

    Temiz ve güvenilir bir şekilde sorunumuz çözüldü.
    Benim tahmin ettiğim fiyatın çok altında kalan bir hizmet oldu.
    Cumartesi akşam olmasına rağmen aramam ile sorunun çözülmesi iki saati bulmadı.
    Teşekkürü bir borç bilirim.

Questions about boiler installation

All questions

What should I do before buying a new boiler?

Message us first. Let's work out together the right capacity for the size of your home and how you use it. A boiler that is too big or too small burns more gas and doesn't heat the house comfortably.

Can you move my boiler?

Yes. If you want the boiler moved to another place in the house, we make the connections in the new place and hand the boiler over working.

Do you install room thermostats?

Yes. We connect a wired or wireless room thermostat to the boiler and set it up. When the house reaches the temperature you want, the boiler stops and doesn't waste gas. More tips in our saving gas article.

How is the price of an installation decided?

Once we have discussed the scope of the job, we tell you the price before starting. We never start without your approval.

Do you give a guarantee on installation work?

Yes. We give a one-year guarantee on our workmanship.

Other services

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Message us on WhatsApp

Just tell us your boiler's brand and the problem. İlhan speaks only Turkish: write in English and he replies using a translation app. From a photo of the display or the error code we can often tell roughly what the fault is.

Phone (Turkish only): +90 535 255 88 00

  • Your contactİlhan Dereli (speaks Turkish)

  • Emaililhan@dereliteknik.com

  • Working hoursWeekdays 08:00⁠–⁠20:00
    Saturday 09:00⁠–⁠18:00

  • AreaAll of Kocaeli, at your home

Message on WhatsApp