In Ankara’s Cankaya and Oran, how common are geothermal or central heating systems, and what are typical monthly bills versus individual combi boilers?

In Cankaya and Oran, central heating systems in multi‑unit, post‑2008 buildings are widespread due to national energy performance rules, while geothermal district heating is not used in these neighborhoods. [1][2][6]

What you will find in Cankaya and Oran

Cankaya and Oran are dominated by apartment complexes built or renovated after 2008, and Turkish building energy rules require central heating systems in buildings with a usable area above 2,000 square meters, subject to defined exceptions in the regulation. [1] This legal requirement has made central systems common in medium‑to‑large residential compounds across Ankara’s urban districts, including Oran’s newer developments. [1] Individual gas‑fired combination boilers (combi, kombi) remain present in smaller or older buildings that do not meet the central‑system threshold, or in blocks permitted under the exceptions in the regulation. [1] There is no municipal geothermal district heating scheme in Cankaya or Oran; Ankara Province’s geothermal resources are concentrated in spa towns such as Kızılcahamam, where geothermal is used locally and not transmitted into the capital’s central districts. [6][7]

Legal basis for central versus individual systems

The Energy Performance of Buildings Regulation (Binalarda Enerji Performansı Yönetmeliği) sets the framework for heating system choices. For residential buildings that exceed the total usable area threshold prescribed in the regulation, a central heating system with appropriate control and metering is mandated to ensure efficiency and equitable heat distribution. [1] Where a central system exists, heat‑cost allocation is governed by the Regulation on Allocation of Heating and Domestic Hot Water Costs in Central Systems (Merkezi Isıtma ve Sıhhi Sıcak Su Sistemlerinde Isınma ve Sıhhi Sıcak Su Giderlerinin Paylaştırılmasına İlişkin Yönetmelik), which provides the rules for meters, allocators, and billing methodology within the building. [2] These two regulations explain why central heating is commonly encountered in large complexes in Cankaya and Oran, whereas individual combi boilers are lawful and frequent in smaller buildings falling outside the central‑system obligation. [1][2]

How billing works in central systems

In a central system, the site management collects monthly advances and settles costs according to the legally defined allocation method based on measured consumption and a fixed share for common losses and system operation. [2] The allocation regulation requires measurement via heat meters or cost allocators, and it sets binding principles for how much of the total fuel expense is distributed according to individual consumption versus a fixed portion that covers common areas and system baseload. [2] Fuel for most central systems in Cankaya and Oran is natural gas supplied by Başkentgaz, Ankara’s licensed distributor, and retail tariffs applicable to residential consumers are approved and published by the Energy Market Regulatory Authority (Enerji Piyasası Düzenleme Kurumu, EPDK). [3][4] The monthly payment you see in a central‑heated building therefore reflects two items: the building’s aggregate gas cost under the EPDK‑approved residential tariff for that period, and the allocation formula that translates this aggregate cost into your apartment’s payable share under the regulation. [2][3]

How billing works with individual combi boilers

In a combi‑heated flat, you receive an individual natural gas bill directly from Başkentgaz, calculated from the metered volume you consumed and the current residential retail tariff for Ankara, as approved by EPDK. [3][4] The bill will include the energy charge for gas, the distribution charge set for the Başkentgaz service area, and applicable taxes and fees, all determined or approved by EPDK and shown on the supplier’s tariff schedule. [3][4] Because the household pays only for the gas that its own appliance consumes, without a building‑level fixed component, the monthly variability tends to be driven by your thermostat settings, building insulation, apartment exposure, and actual outdoor conditions. The way to estimate a combi bill is to multiply the metered cubic meters for the month by the current Ankara residential tariff, and then add the distribution and tax components published by EPDK and the distributor for that billing cycle. [3][4]

Typical costs: what to expect and how to estimate

There is no single “typical” monthly figure that applies uniformly across Cankaya and Oran, because bills depend on building size, insulation quality, apartment orientation, occupancy patterns, thermostat set‑points, and current tariffs. The most reliable way to benchmark is to use the tariff tables that EPDK publishes for residential natural gas and the specific distribution charges for Başkentgaz, then apply them to a realistic monthly consumption for your apartment. [3][4] In central systems, ask the site manager for the previous heating season’s total gas invoices for the block, the allocation reports produced under the heat‑cost allocation regulation, and the monthly advances collected during the heating season. These documents allow you to derive an apartment‑level monthly average under the legally required allocation methodology. [2][3] In combi‑heated buildings, check the apartment’s prior winter bills and match the billed volume in cubic meters to the EPDK tariff in effect on those dates; EPDK’s archive allows cross‑checking historical rates for accuracy. [3] Ankara’s winter conditions make heating a significant seasonal expense, so using current tariff data rather than generic national averages provides a more accurate basis for budgeting. For any financial planning, this information is general; engaging a licensed energy auditor or property manager for a building‑specific assessment is advisable.

Geothermal heating: availability in these districts

Geothermal district heating is present in certain Turkish municipalities with local resources and networks, and Ankara Province has geothermal resources primarily associated with thermal tourism areas such as Kızılcahamam. [6][7] However, these systems are localized and are not connected to Cankaya or Oran’s residential neighborhoods. [7] In practical terms, buyers in these districts should evaluate either a central natural‑gas boiler with legally mandated heat‑cost allocation or an individual gas‑fired combi boiler, rather than expecting a geothermal connection. [2][4][7]

Practical due diligence before you buy

Before purchase, ask for the building’s as‑built documentation or energy identity certificate indicating the heating system type and compliance with the Energy Performance of Buildings Regulation. [1] If it is a central system, request the latest season’s allocation report, fuel invoices, maintenance logs, and the site management plan that explains how advances are set and reconciled under the allocation regulation. [2] If it is a combi‑based unit, request at least twelve months of prior gas bills for that apartment and verify the tariff components against EPDK’s published residential rates for the corresponding periods and Başkentgaz’s distribution charges. [3][4] This documentation confirms both the technical configuration and the financial profile you can expect under the applicable regulatory framework. For budgeting decisions, consider obtaining professional advice tailored to your apartment’s size, insulation, and occupancy profile.

Related Questions:
– Q2 (Are heat-cost allocators mandatory in Ankara apartment buildings with central heating?)
– Q3 (How does the Energy Identity Certificate affect heating costs in new Ankara apartments?)
– Q4 (Who sets and audits site management heating advances in central systems?)
– Q5 (What are the current EPDK residential natural gas tariffs for Ankara?)

References:
[1] Official Gazette (Resmi Gazete). “Binalarda Enerji Performansı Yönetmeliği.” https://www.resmigazete.gov.tr/eskiler/2008/12/20081205-5.htm
[2] Official Gazette (Resmi Gazete). “Merkezi Isıtma ve Sıhhi Sıcak Su Sistemlerinde Isınma ve Sıhhi Sıcak Su Giderlerinin Paylaştırılmasına İlişkin Yönetmelik.” https://www.resmigazete.gov.tr/eskiler/2008/04/20080414-5.htm
[3] Energy Market Regulatory Authority (EPDK). “Doğal Gaz Perakende Satış Tarifeleri.” https://www.epdk.gov.tr/Detay/Icerik/3-0-2/dogalgaz-perakende-satis-tarifeleri
[4] Başkentgaz. “Tarifeler ve Ücretlendirme.” https://www.baskentdogalgaz.com.tr/
[5] Turkish Statistical Institute (TurkStat). “Building Construction Statistics (Building Permits).” https://data.tuik.gov.tr/
[6] General Directorate of Mineral Research and Exploration (MTA). “Geothermal Energy Information Center.” https://www.mta.gov.tr/v3.0/bilgimerkezi/jeotermal
[7] Kızılcahamam Municipality. “Jeotermal.” https://www.kizilcahamam.bel.tr/jeotermal

Disclaimer: This article is for informational purposes only and does not constitute legal, financial, or investment advice. Property law and tax rules in Turkey change frequently. Consult a licensed Turkish lawyer, accountant, or real estate professional before making any purchasing decision.