Greenhouse Heating Calculator
Estimate peak heating load in kW, indicative installed capacity and annual heat energy for a commercial greenhouse — from covering U-value, design temperatures, wind exposure and thermal screens. Planning tool for budgeting and RFQ scope, not engineering design.
Greenhouse Heating Calculator
Estimate peak heating load in kW, indicative installed capacity and annual heat energy for a commercial greenhouse — from covering U-value, design temperatures, wind exposure and thermal screens. Planning tool for budgeting and RFQ scope, not engineering design.
Estimate only — not a quotation. Outputs are indicative planning ranges based on the values you enter and typical commercial benchmarks. Real pricing, specifications and lead times vary by country, site conditions and supplier, and are confirmed only in written offers collected through a private RFQ.
Project inputs
U-value 4 W/m²K
Use the local 99% winter design value.
Sheltered 5%, typical 10%, exposed 20%.
Single screen 20–35%, twin screens 35–50%.
Gas boiler ~90%; heat pump 250–400%.
Planning estimate only. Final heat plant, pipe-rail, buffer and dehumidification design require a climate engineer using local weather files and crop setpoints.
Sensitivity: what changes the result most
Same formula, one input changed at a time. Costs in USD at your entered price; illustrative, not a savings guarantee.
| Scenario | Peak kW | Annual cost (USD) |
|---|---|---|
| Your inputs | 1,089 | 197,041 |
| Energy price −30% | 1,089 | 137,929 |
| Energy price +30% | 1,089 | 256,153 |
| Design temperature 3 °C colder | 1,215 | 197,041 |
| No thermal screen | 1,556 | 281,487 |
Turn this estimate into a qualified project
SeedMatchGroup is a supplier-neutral, human-led platform. We do not manufacture or resell equipment — we help buyers specify the project, review relevant suppliers privately and compare the written offers received. Supplier participation and timing are not guaranteed.
Greenhouse heat calculator: from local climate to heating scope
It converts the greenhouse envelope and your climate design conditions into a peak heating load in kW, an indicative installed capacity, and the annual heat energy and cost that follow. Use it to frame the heat-plant budget and to write a heating scope that suppliers can quote against.
Who should use it
Project developers, growers, investors and consultants scoping a new build or a retrofit in a heating-driven climate — the Netherlands, Germany, France, Poland, Canada, the Nordics, highland and continental markets — or anyone comparing covering and screen options before requesting quotes.
Method and assumptions
Transmission load is envelope area × covering U-value × design temperature difference. Envelope area assumes a roughly square footprint with a roof factor of 1.12 for pitch, plus perimeter walls at gutter height. Wind and infiltration are applied as a percentage uplift; thermal screens as a percentage reduction. Annual energy scales the peak load by the ratio of the seasonal average temperature difference to the design difference over the heating days entered, then divides by plant efficiency or COP.
Limitations: the model excludes solar gain, latent load from dehumidification, crop transpiration, CO₂ strategy, lighting waste heat and hourly weather variation. Long, narrow or multi-block layouts have more envelope per m² than the square assumption. Treat the result as a range, not a specification.
Worked example
A 1 ha double-inflated polyfilm house (U 4.0) with 6 m gutters has roughly 13,600 m² of envelope. Held at 18 °C against a −8 °C design temperature the raw transmission load is about 1,414 kW; a 10% wind uplift and a 30% screen saving bring the peak to roughly 1,089 kW, or about 109 W/m² of floor — so a heat plant of around 1,250 kW installed. Switching to twin-wall polycarbonate at U 3.0 cuts the same peak to about 817 kW.
How heating affects commercial greenhouse pricing
Peak heat load helps define the boiler or heat-pump scope; annual energy cost is a separate operating expense. This calculator does not price equipment or installation. Use the commercial greenhouse pricing guide for clearly labelled planning ranges and country guides, then compare written quotations against the same local design conditions.
What suppliers need to quote heating
Location and design temperature, covered area and gutter height, covering and screen specification, crop setpoints day and night, humidity strategy, available fuel or electrical capacity, and whether a buffer tank, CO₂ recovery or heat-pump integration is in scope. Missing any of these produces bids that cannot be compared.
Method, limits and sources
What it does not cover
- Infiltration is a percentage uplift, not the standard's separate air-leakage equation.
- One design temperature and a seasonal average; no hourly weather file, solar gain or dehumidification load.
- Results scope the heat plant for an RFQ; they are not an equipment selection.
Sources
- ANSI/ASAE EP406.4 Heating, Ventilating and Cooling Greenhouses — ASABE (American Society of Agricultural and Biological Engineers), JAN2003, reaffirmed 2008; now withdrawn and sold as a historical document.
Equation 1 gives heat loss through the cover as q = U × A × (inside − outside temperature), the transmission-loss line of this calculator.
The covering U-values, the 1.12 roof factor, wind uplift, screen savings, the 15% installed margin and the seasonal energy method are editable SeedMatch planning assumptions, not figures taken from the standard. Replace them with the project engineer's site design.
Frequently asked questions
Peak load is roughly the envelope area × U-value × the design temperature difference, plus a wind/infiltration uplift and less screen savings. With this calculator's method, one hectare with 6 m gutters held at 18 °C against a −10 °C design temperature and a 10% wind uplift comes to about 2.5 MW peak under single polyfilm, about 1.7 MW under double inflated polyfilm and about 0.8 MW under diffuse double glass with a 35% thermal screen. Engineers usually add ventilation, dehumidification and safety margins on top, so treat these as planning figures.
Multiply kW by 3,412.14. For example, a 100 kW peak load is about 341,214 BTU/h. The calculator shows both units.
Transmission load = envelope area (roof + walls, adjusted for shape) × U-value of the covering × (inside setpoint − outside design temperature). Infiltration and wind exposure add a percentage uplift, thermal screens subtract one, and installed capacity adds a safety margin above peak.
Use the local 99% winter design temperature — the value exceeded in about 99% of hours — not the record minimum. Sizing on the record low inflates boiler capacity and CAPEX for a handful of hours per decade.
A single closed screen typically cuts night transmission losses by 20–35%, and twin screens by 35–50%. Screens also reduce required installed capacity, which is often a larger saving than the fuel itself.
No. This is a planning estimate for budgeting and RFQ scope. Final boiler, heat-pump, pipe-rail and buffer sizing require a climate engineer working with local weather files, crop setpoints and humidity control strategy.
No. SeedMatchGroup is supplier-neutral and does not manufacture equipment. The calculator helps you specify the load; after review, a sourcing specialist may privately approach relevant manufacturers and integrators.
Send these numbers to the RFQ Builder
The numbers below were calculated with SeedMatchGroup's Greenhouse Heating Load Calculator. Indicative — the specialist will confirm scope before contacting suppliers.
12 inputs · assumptions · results
Pair this with the greenhouse energy calculator for total electricity, climate calculator for cooling and ventilation, and TCO calculator to compare covering and heat-plant options over 5 and 10 years. Cold-climate context: Canada, Netherlands, Germany.
How should energy and financing volatility change my plan?
Size the system on engineering loads first, then test running costs and financing against price swings. Use one shared stress case across tools: energy +24% and fertilizer +31% (World Bank 2026 vs 2025 index outlook, 28 April 2026), with water unchanged unless your utility confirms a change. These are index movements, not local prices or forecasts for your site.
- Ask bidders to quote energy use (kWh, m³ gas) and nutrient quantities, not just equipment price, so you can reprice them locally.
- Lenders usually review cash flow under higher costs; prepare the stressed case before applying. Financing is never guaranteed.
- If costs are the main pressure, compare retrofitting existing houses with expanding or building new before committing capital.
Turning this estimate into a request? The greenhouse systems request builder lists what changes a quote — structure, cover, climate and installation scope — and opens a pre-filled request that our team reviews before any supplier is contacted.
Understanding the values
What each choice in this calculator means, and how the options differ in practice.
- Temperature difference
- The gap between the night setpoint and the design outside temperature drives the load. Each extra degree of setpoint raises fuel use noticeably — check the crop's real minimum before raising it.
- Covering U-value
- How much heat the covering leaks. Single film leaks the most; double-layer, polycarbonate and glass with screens retain more. The U-value difference often matters more than heater size.
- Thermal screen
- A closed energy screen at night cuts radiative loss substantially. It is usually the cheapest heating 'fuel' you can buy.
Illustrative project summary
3 ha Venlo glass project
An agribusiness plans a high-tech glass block with screens, heating and hydroponics for year-round supply.
3 ha · Venlo glass greenhouse · Cucumbers and peppers
Indicative full greenhouse project CAPEX
USD 5.17M – USD 13.65M
Illustration only, not a real project or quotation. This is the structure, equipment and site-works budget for the example greenhouse, not the price of this calculator’s individual system, seeds or inputs, and not a result calculated from your entries. Excludes land, permits, packhouse, financing costs and working capital.
Based on the published commercial greenhouse cost benchmark. Written offers require a private project review; commercial projects start from USD 250K.
What can change the result?
This is a preliminary planning estimate based on the values you entered. The variables below usually move the outcome most, and should be confirmed with an agronomist, engineer and supplier offers before final design.
- Local climate: temperature, humidity, radiation and wind exposure
- Greenhouse type and technology level (tunnel, naturally ventilated, high-tech)
- Covering material and light transmission (film, polycarbonate, glass)
- Heating system, fuel type and winter set points
- Energy and utility tariffs, plus tariff escalation over time
Questions this calculator answers
Typical buyer and investor searches this tool is built for, including the markets where we run the most commercial projects.
- greenhouse heating, cooling and energy cost per hectare for a commercial project
- greenhouse heating, cooling and energy cost for a 2-hectare project — India
- greenhouse heating, cooling and energy cost: indicative planning ranges — Kenya
- greenhouse heating, cooling and energy cost benchmarks for investors — Saudi Arabia
- greenhouse heating, cooling and energy cost under local market conditions — Mexico
- greenhouse heating, cooling and energy cost — what to specify in a supplier RFQ
Method and decision path
How to use this result in a commercial project
Use the result to test scope and compare scenarios. It is not a design, agronomic prescription, financing offer or supplier quotation.
1. Enter site evidence
Replace defaults with measured area, climate, water, energy, crop and commercial assumptions.
2. Test scenarios
Change one assumption at a time and record the effect on capacity, cost, demand or return.
3. Validate the duty
Ask the relevant agronomist, engineer or financial adviser to check the inputs and constraints.
4. Prepare a private RFQ
Carry the confirmed scope into a human-reviewed brief so written offers can be compared on the same basis.
Final specifications, performance, prices, supplier participation and timing depend on the site and written supplier responses; none is guaranteed by this calculator.
Plan the project around the numbers
A calculator output is a starting point. Pair it with the planning guides below to align timeline, irrigation, budget and risk before you launch an RFQ.
One private brief, specialist review, private supplier research and a like-for-like comparison.
Spec gaps, MOQ, delivery, Incoterms and evidence labels for seeds, greenhouses, irrigation, fertilizers and produce.
Month-by-month schedule from concept to first harvest across 9 stages.
Design principles for drip, pivot, fertigation and filtration on commercial projects.
How CAPEX, working capital and operating cost drive the project business case.
The ten most expensive planning and procurement pitfalls — and how to avoid them.
Procurement answers behind these numbers
A model output only holds if the scope, contract route and delivery terms match the assumptions. These reference answers cover the commercial decisions that move the figure.
- Turnkey EPC vs separate equipment packages
- What belongs in a greenhouse equipment specification
- Normal payment milestones in equipment contracts
- Which Incoterms to use for greenhouse and irrigation equipment
- How long a commercial greenhouse takes from order to handover
- What is normally the owner's scope on a greenhouse project
Move greenhouse heating calculator into a structured RFQ
Editorial · not a sales pitchCalculator outputs are indicative. When your numbers stabilise, a supplier-neutral RFQ turns those estimates into a consistent brief for comparing the written offers that participating suppliers provide.
The facts a complete, supplier-neutral request on this topic includes. Use it as a checklist before submitting.
- Covered area (m² or ha), bay/gutter layout preference and target gutter height
- Site location, altitude and design loads (wind, snow, seismic) if known
- Crop and production system (soil, substrate, hydroponic, nursery)
- Covering choice: polyethylene film, polycarbonate or glass — and expected lifetime
- Climate scope: ventilation, screens, heating, cooling/pad-fan, CO₂, controls
- Irrigation/fertigation scope and water source quality
- Target commissioning date, phasing and budget band (USD $250K+)
- Incoterms, destination port/site and who handles civil works and erection
- Site plan or coordinates with plot dimensions
- Soil/water analysis where available
- Any existing concept drawing, BOQ or previous supplier offer
Opens the RFQ Builder pre-scoped as a greenhouse project so suppliers quote structure, covering, climate and irrigation on the same basis. You stay in control — nothing is submitted until you review and confirm.
Free to submit · supplier-neutral · reviewed by a specialist before any supplier is contacted.
Running these numbers for a client project?
Agronomists, greenhouse and irrigation consultants use this calculator for feasibility, then hand the project to us for supplier shortlisting, RFQ preparation and quote comparison. You stay client-facing and we work through you.
Your client relationship stays with you — we work through you and never contact your client unless you ask.
Indicative only
- This tool is indicative only.
- It is not financial advice.
- It is not agronomic advice.
- It is not engineering design.
- Final numbers require supplier, agronomist, engineer and local regulatory review.
SeedMatch Group is an independent agricultural project sourcing and RFQ platform. We are not a farm, seed producer, fertilizer manufacturer, irrigation manufacturer, greenhouse builder, EPC contractor, lender or financial advisor. Supplier and project partner outreach is handled only after a commercial project brief is reviewed.
Supplier and manufacturer content is provided for research, transparency and discovery only. Buyers submit one project or RFQ to SeedMatch Group; our team validates and organises it, manages any suitable supplier or manufacturer outreach, and presents the responses through SeedMatch. There is no public directory of company identities, automatic matching, direct messaging or direct buyer-supplier contact.