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class=\"et_pb_column et_pb_column_2_3 et_pb_column_2_tb_body  et_pb_css_mix_blend_mode_passthrough\">\n\u003Cdiv class=\"et_pb_module et_pb_post_content et_pb_post_content_0_tb_body\">\n\u003Cdiv>\n\u003Ch2>\u003Cstrong>The Result\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>A new office scheme achieved \u003Cstrong>Part L compliance sign‑off first time\u003C\u002Fstrong> because the SBEM model remained aligned with \u003Cstrong>as built\u003C\u002Fstrong> services, not outdated early‑design assumptions.\u003Cbr>ATSPACE produced the SBEM calculations, tracked design and procurement changes throughout delivery, and issued final BRUKL outputs \u003Cstrong>in time for practical completion\u003C\u002Fstrong> with a clean, defensible evidence trail.\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>Project Snapshot\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>\u003Cstrong>Service:\u003C\u002Fstrong> SBEM calculations\u003Cbr>\u003Cstrong>Client:\u003C\u002Fstrong> Developer + design & build contractor\u003Cbr>\u003Cstrong>Site:\u003C\u002Fstrong> Meridian Exchange, 44 Station Boulevard, Reading RG1 1LZ\u003Cbr>\u003Cstrong>Building type:\u003C\u002Fstrong> 6‑storey new build office with reception + amenity areas\u003Cbr>\u003Cstrong>Floor area:\u003C\u002Fstrong> Approx. 7,400 m²\u003Cbr>\u003Cstrong>Services strategy:\u003C\u002Fstrong> All‑electric HVAC, mechanical ventilation, zone controls, metering\u003Cbr>\u003Cstrong>Programme stage:\u003C\u002Fstrong> Practical completion window\u003Cbr>\u003Cstrong>Compliance driver:\u003C\u002Fstrong> Building Regulations Part L (non‑domestic)\u003Cbr>\u003Cstrong>ATSPACE delivery:\u003C\u002Fstrong> Design‑stage SBEM, iterative model updates, as‑built SBEM, final BRUKL outputs\u003Cbr>\u003Cstrong>Team:\u003C\u002Fstrong> ATSPACE building performance engineer + compliance coordinator\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>Why SBEM Is Where Projects Lose Time\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>Part L issues on commercial buildings usually appear when the SBEM model \u003Cstrong>falls out of sync with real‑world decisions\u003C\u002Fstrong>.\u003C\u002Fp>\n\u003Cp>Typical triggers:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>lighting layouts change but schedules aren’t updated\u003C\u002Fli>\n\u003Cli>zoning\u002Fcontrols altered during value engineering\u003C\u002Fli>\n\u003Cli>ventilation rates shift during coordination\u003C\u002Fli>\n\u003Cli>metering and BMS intent not recorded clearly\u003C\u002Fli>\n\u003Cli>specifications drifting across drawings, schedules and O&Ms\u003C\u002Fli>\n\u003Cli>commissioning decisions not checked against compliance impact\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>The developer wanted a \u003Cstrong>calm route to completion\u003C\u002Fstrong> — no last‑minute SBEM redesign, no Building Control queries, no scramble.\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>What SBEM Calculations Do in Practice\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>SBEM (Simplified Building Energy Model) is used to demonstrate non‑domestic Part L compliance.\u003Cbr>The model is only as accurate as the inputs.\u003C\u002Fp>\n\u003Cp>A compliant SBEM process requires:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>accurate geometry & zoning\u003C\u002Fli>\n\u003Cli>correct fabric & glazing values\u003C\u002Fli>\n\u003Cli>correct lighting & controls\u003C\u002Fli>\n\u003Cli>correct HVAC type, efficiencies & control strategy\u003C\u002Fli>\n\u003Cli>ventilation rates aligned with coordinated design\u003C\u002Fli>\n\u003Cli>correct metering & BMS description\u003C\u002Fli>\n\u003Cli>a defensible evidence pack for Building Control\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>ATSPACE treats SBEM as a \u003Cstrong>managed deliverable\u003C\u002Fstrong>, not a final‑stage document.\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>What ATSPACE Was Asked To Do\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>The contractor needed ATSPACE to:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>produce SBEM outputs and BRUKL reports\u003C\u002Fli>\n\u003Cli>keep the model aligned to design development + procurement\u003C\u002Fli>\n\u003Cli>minimise Building Control queries via controlled evidence\u003C\u002Fli>\n\u003Cli>deliver final outputs \u003Cstrong>in time for PC\u003C\u002Fstrong>\u003C\u002Fli>\n\u003Cli>avoid late‑stage redesign triggered by compliance drift\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch2>\u003Cstrong>What ATSPACE Did\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Ch3>\u003Cstrong>Step 1: Lock down a clear baseline model early\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>We created a baseline SBEM model with recorded assumptions and agreed:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>which elements were fixed\u003C\u002Fli>\n\u003Cli>which were likely to change\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>This prevented disputes later about what the model assumed.\u003C\u002Fp>\n\u003Ch3>\u003Cstrong>Step 2: Short, targeted evidence checklist\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>Instead of asking for everything, we requested only the items that \u003Cstrong>move compliance\u003C\u002Fstrong>:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>lighting schedule + control strategy\u003C\u002Fli>\n\u003Cli>HVAC plant + efficiencies\u003C\u002Fli>\n\u003Cli>zoning + operating schedules\u003C\u002Fli>\n\u003Cli>ventilation rates + supply\u002Fextract strategy\u003C\u002Fli>\n\u003Cli>metering arrangement + sub‑metering\u003C\u002Fli>\n\u003Cli>heat‑recovery details where relevant\u003C\u002Fli>\n\u003Cli>any glazing\u002Ffabric changes\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>This cut down unnecessary email chasing and ensured no critical data went missing.\u003C\u002Fp>\n\u003Ch3>\u003Cstrong>Step 3: Track model updates alongside procurement\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>As products and strategies were finalised, the model was updated immediately.\u003Cbr>This prevented the classic “final‑stage shock” where the as‑installed strategy no longer matches the last compliant model.\u003C\u002Fp>\n\u003Ch3>\u003Cstrong>Step 4: Focus on the high‑impact compliance drivers\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>For offices, the main compliance movers are:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>lighting + lighting controls\u003C\u002Fli>\n\u003Cli>HVAC efficiencies + controls\u003C\u002Fli>\n\u003Cli>ventilation rates + heat recovery\u003C\u002Fli>\n\u003Cli>glazing values & solar control\u003C\u002Fli>\n\u003Cli>zoning and schedules\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>We ensured none of these were left vague.\u003C\u002Fp>\n\u003Ch3>\u003Cstrong>Step 5: As‑built confirmation before issuing outputs\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>Near completion, we conducted an as‑built review with the contractor + building services lead so final SBEM inputs reflected \u003Cstrong>actual installation\u003C\u002Fstrong>, not assumptions.\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>Problems Faced — and How They Were Solved\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Ch3>\u003Cstrong>Problem 1: Lighting substitution late in programme\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>Lighting was changed due to supplier issues.\u003C\u002Fp>\n\u003Cp>\u003Cstrong>Why it mattered:\u003C\u002Fstrong> lighting efficacy + controls strongly influence SBEM.\u003Cbr>\u003Cstrong>Fix:\u003C\u002Fstrong> confirmed installed product metrics, updated model, avoided compliance drift.\u003C\u002Fp>\n\u003Ch3>\u003Cstrong>Problem 2: Controls narrative unclear\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>Controls were installed, but documentation was weak.\u003C\u002Fp>\n\u003Cp>\u003Cstrong>Why it mattered:\u003C\u002Fstrong> unclear controls = conservative SBEM assumptions.\u003Cbr>\u003Cstrong>Fix:\u003C\u002Fstrong> worked with services team to document zoning + control strategy clearly.\u003C\u002Fp>\n\u003Ch3>\u003Cstrong>Problem 3: Ventilation rates altered during coordination\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>Ventilation values changed when ceilings and plant zones were reworked.\u003C\u002Fp>\n\u003Cp>\u003Cstrong>Why it mattered:\u003C\u002Fstrong> ventilation energy is a major SBEM factor.\u003Cbr>\u003Cstrong>Fix:\u003C\u002Fstrong> captured final coordinated strategy and updated the model accordingly.\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>Outcome\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>The office scheme achieved \u003Cstrong>Part L compliance sign‑off first time\u003C\u002Fstrong>, with all final SBEM\u002FBRUKL outputs delivered \u003Cstrong>before\u003C\u002Fstrong> practical completion.\u003C\u002Fp>\n\u003Cp>Project outcomes:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>no programme delays due to SBEM\u003C\u002Fli>\n\u003Cli>reduced Building Control queries\u003C\u002Fli>\n\u003Cli>model aligned to as‑built services\u003C\u002Fli>\n\u003Cli>clean audit trail supporting handover documentation\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch2>\u003Cstrong>Common Mistakes This Project Avoided\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cul>\n\u003Cli>leaving SBEM at design stage while procurement changes everything\u003C\u002Fli>\n\u003Cli>treating lighting substitutions as minor\u003C\u002Fli>\n\u003Cli>vague control strategies forcing conservative assumptions\u003C\u002Fli>\n\u003Cli>issuing final outputs without as‑built review\u003C\u002Fli>\n\u003Cli>discovering compliance drift only at the end\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch2>\u003Cstrong>CTA\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>If you need SBEM calculations that support \u003Cstrong>Part L sign‑off without last‑minute surprises\u003C\u002Fstrong>, ATSPACE will keep the model aligned to the as‑built building and deliver accurate outputs in time for practical completion.\u003C\u002Fp>\n\u003Cp>\u003Cstrong>Ask for:\u003C\u002Fstrong>\u003C\u002Fp>\n\u003Cul>\n\u003Cli>SBEM calculations + BRUKL 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