House one
InverterGOLD heat pump
GOLD · R29012.31kW of heat
15.0°
Area 100 m²Energy cost so far0new SYP
Electricity used0.0kWh
Electrical input now3.04kW
A 30-day heating simulation
Two houses. Equal heat. Different bills.
7°outdoors21°target
An educational energy-cost estimate with an assumed 16 kW heat output limit and constant conditions. COP and boiler efficiency are adjustable; results are not guaranteed savings or a substitute for project design.
GOLD · R290House two
CombustionDiesel boiler
Boiler with the same heat output
12.31kW of heat
15.0°
Area 100 m²Energy cost so far0new SYP
Diesel used0.0litres
Useful heat delivered0.0kWh of heat
76.5%Lower energy costEstimated over 30 days
Cost difference32,927new SYP
GOLD · 30 days10,137SYP
Diesel · 30 days43,064SYP
01
Set the same conditions for both houses
Changing an input resets the clock and recalculates the comparison.
Verified examples:
m²
°C
°C
COP
Household: 6 new SYP/kWh for the first 300 kWh of a two-month billing cycle, then 14. Enter the allowance left for heating after other household consumption. The default assumes no first-tier allowance remains. All 30 days fall in one billing cycle, without an allowance reset.
Heat-load and thermal-response details
Design heat load is referenced to 21°C indoors and −5°C outdoors. Thermal capacity is an assumption for the building and its contents. An illustrative 3-hour response controls the approach to target temperature. Available heat output is assumed fixed at 16 kW; actual sizing must use the unit’s capacity and COP at the relevant air and water temperatures.
Cumulative energy costs
New Syrian poundsGOLDDiesel
Days · The vertical line marks current time; both curves show the full projection.
From warm-up to steady operation
Electrical input · kW3.04at start←1.00after 24 hours
Hours · Illustrative building response; not a compressor test map.
02
Why does energy use differ?
The heat pump transfers energy from air to water. A boiler converts fuel energy into heat.
Inverter output follows demand
Warm-up can require extra heat. As the house stabilizes, output approaches its heat loss. The curve illustrates load-following control, not a measured compressor performance map.
The buffer supports stable operation
Thermal storage and insulation can reduce cycling and support stable flow. No separate buffer saving is added to the calculation; its benefit depends on sizing, connections and controls.
COP is an explicit assumption
The starting COP of 4.05 references GOLD’s 16 kW model at 7°C air and 35°C supply water. When weather changes, COP remains your explicit input; it does not adjust automatically.
Sources, equations and comparison limits
The energy balance, step by step
Heat loss is calculated from floor area, design heat load and temperature difference. Both houses receive equal useful heat each minute, converted to electricity or diesel through these equations:
E = Q / COP
Diesel (L) = Q / (10.64 × η)
Diesel (L) = Q / (10.64 × η)
Q is useful heat in kWh; η is boiler efficiency as a decimal. The default 80% is an adjustable overall operating assumption, not a specification of a particular boiler. Approximate diesel heat content uses a higher heating value (HHV) basis; efficiency must use the same basis, not an LHV-rated value.
UA = area × design load / (1000 × 26)
C = area × thermal capacity / 1000
Heat loss = UA × (T − T outdoor)
C × ΔT / Δt = heat input − heat loss
C = area × thermal capacity / 1000
Heat loss = UA × (T − T outdoor)
C × ΔT / Δt = heat input − heat loss
UA is in kW/K and C in kWh/K. The time step is one minute. The illustrative controller requests heat-loss replacement plus a 3-hour response toward the target, capped between zero and 16 kW.
Incremental household cost charges the available first-tier allowance at 6, then 14 for the remainder. The full two-month allowance is not assumed available for heating.
What does this model represent?
The comparison assumes grid electricity and diesel remain available throughout. Backup electricity during rationing, external pump consumption and distribution losses are not included; they must be added for a detailed project assessment.
Product reference: GOLD’s supplied seminar catalog, R290 16 kW model; 16 kW heating, 3.95 kW input and COP 4.05 at A7/6 · W30/35. The photo shows the actual GOLD cabinet shared by the 16 and 22 kW models according to the company.
Inverter and buffer benefits are not added as separate discounts. Response time and thermal capacity are educational assumptions. Outdoor temperature changes building load; choosing COP requires a relevant performance source or engineering estimate.
Solar and internal heat gains are omitted and outdoor temperature is constant for 720 hours. The diesel boiler follows the same delivered heat, with the same 16 kW limit; actual burner cycling is not modeled. The limit is not a guaranteed unit capacity in every weather condition.
Household electricity tiers and two-month cycleSANA · August 2026
Commercial, industrial and special tariffsSANA · Ministry of Energy decision
Old-to-new Syrian pound conversionSANA · Decree 293 · 100 old = 1 new
Diesel price: 125 new SYP per litreNorth Press · 4 September 2026
Diesel heat content and unit conversionsU.S. EIA · approximately 10.64 kWh/L
How heat pumps work and their performanceInternational Energy Agency
Price reference as of 6 September 2026. The diesel rate is dated 4 September, reported from the pricing committee in the linked coverage. Update it when a newer bulletin is issued. These energy-use estimates are not a binding quotation.